[{"data":1,"prerenderedAt":2190},["ShallowReactive",2],{"page:\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Ftiered-caching-and-origin-shield":3,"all-docs-nav":1038,"filed:\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Ftiered-caching-and-origin-shield":2178},{"id":4,"title":5,"body":6,"breadcrumb":1013,"dateModified":1023,"datePublished":1023,"description":1024,"extension":1025,"faq":1026,"meta":1031,"navigation":1032,"path":1033,"seo":1034,"slug":12,"stem":1035,"type":1036,"__hash__":1037},"content\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Ftiered-caching-and-origin-shield\u002Findex.md","Tiered Caching and Origin Shield",{"type":7,"value":8,"toc":994},"minimark",[9,13,17,26,31,53,57,64,194,198,201,213,216,361,365,368,434,441,445,455,568,571,575,584,685,689,697,711,715,718,815,865,869,910,914,917,921,926,929,933,936,940,943,947,950,954,990],[10,11,5],"h1",{"id":12},"tiered-caching-and-origin-shield",[14,15,16],"p",{},"A CDN has hundreds of edge locations, and each keeps its own cache. For a popular page, every edge quickly holds a copy. For the rarely visited majority of a static site — the 1,800 documentation pages that each get a handful of views a day from around the world — most edges never see enough requests to keep a copy warm, especially when HTML has a short lifetime so deploys show up quickly. Each of those misses travels to the origin: an S3 bucket in one region, a small VM, a Pages project. Readers far from the origin wait for the round trip, and the origin serves far more traffic than a \"cached\" site should.",[14,18,19,20,25],{},"Tiered caching fixes this by putting a smaller number of upper-tier caches between the edges and the origin. An edge miss asks the upper tier first; only an upper-tier miss goes to the origin. This guide enables it on Cloudflare (Tiered Cache) and CloudFront (Origin Shield), explains how to pick the tier location, and measures the effect on a 2,300-page documentation site with a global audience. It is part of ",[21,22,24],"a",{"href":23},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002F","CDN Caching Rules for SSGs",".",[27,28,30],"h2",{"id":29},"prerequisites","Prerequisites",[32,33,34,47,50],"ul",{},[35,36,37,38,42,43,25],"li",{},"A static site behind Cloudflare or CloudFront with correct cache headers — hashed assets ",[39,40,41],"code",{},"immutable",", HTML revalidated or with a short edge TTL, as in ",[21,44,46],{"href":45},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fstale-while-revalidate-for-static-html\u002F","Stale-While-Revalidate for Static HTML",[35,48,49],{},"CDN logs or analytics that show cache status and origin requests.",[35,51,52],{},"Knowledge of where the origin is and where readers are.",[27,54,56],{"id":55},"why-rarely-visited-pages-miss","Why Rarely Visited Pages Miss",[14,58,59,60,63],{},"On the documentation site, the top 100 pages received 52% of views and the remaining 2,200 pages the other 48%. HTML had an edge TTL of 10 minutes with ",[39,61,62],{},"stale-while-revalidate",", so deploys appeared quickly. For a page viewed 20 times a day, spread over 300 edge locations, almost every view was the first at its edge within the TTL window — a miss. The measured edge hit ratio for HTML was 71% overall and 38% on pages outside the top 100.",[65,66,67,190],"figure",{},[68,69,76,77,76,81,76,85,76,92],"svg",{"viewBox":70,"role":71,"ariaLabelledBy":72,"xmlns":75},"0 0 760 196","img",[73,74],"tier-tail-title","tier-tail-desc","http:\u002F\u002Fwww.w3.org\u002F2000\u002Fsvg","\n  ",[78,79,80],"title",{"id":73},"Edge hit ratio for top pages and rarely visited pages before and after tiered caching",[82,83,84],"desc",{"id":74},"Paired bars. The top 100 pages had an edge-or-tier hit ratio of 94 percent before tiered caching and 98 percent after. The remaining 2,200 rarely visited pages had 38 percent before and 91 percent after, because upper-tier caches served most edge misses.",[86,87],"rect",{"x":88,"y":88,"width":89,"height":90,"fill":91},"0","760","196","#ffffff",[93,94,96,97,96,108,96,114,96,121,96,125,96,129,96,133,96,140,96,148,96,154,96,158,96,163,96,170,96,176,96,180,96,185,76],"g",{"style":95},"font-family:system-ui, sans-serif;font-size:12px","\n    ",[86,98],{"x":99,"y":100,"width":101,"height":102,"rx":103,"fill":104,"opacity":105,"stroke":106,"style":107},"261.0","50.0","14.0","12.0","2","#ff595e","0.3","#d83b41","stroke-width:1px",[86,109],{"x":110,"y":100,"width":101,"height":102,"rx":103,"fill":111,"opacity":112,"stroke":113,"style":107},"373.2","#8ac926","0.4","#5a8a16",[86,115],{"x":116,"y":117,"width":118,"height":119,"rx":120,"fill":104,"opacity":105,"stroke":106,"style":107},"230.0","82.0","449.8","16.0","3",[86,122],{"x":116,"y":123,"width":124,"height":119,"rx":120,"fill":111,"opacity":112,"stroke":113,"style":107},"102.0","468.9",[86,126],{"x":116,"y":127,"width":128,"height":119,"rx":120,"fill":104,"opacity":105,"stroke":106,"style":107},"134.0","181.8",[86,130],{"x":116,"y":131,"width":132,"height":119,"rx":120,"fill":111,"opacity":112,"stroke":113,"style":107},"154.0","435.4",[134,135],"path",{"d":136,"fill":137,"stroke":138,"style":139},"M230.0 78.0 L230.0 176.0","none","#556071","stroke-width:1.5px",[141,142,147],"text",{"x":143,"y":144,"fill":145,"style":146},"380.0","30.0","#1f2937","font-size:16px;text-anchor:middle;font-weight:700","HTML hit ratio, popular versus rarely visited pages",[141,149,153],{"x":150,"y":151,"fill":138,"style":152},"281.0","60.0","font-size:12px;text-anchor:start","Edges only",[141,155,157],{"x":156,"y":151,"fill":138,"style":152},"393.2","With tiered cache",[141,159,162],{"x":160,"y":161,"fill":145,"style":152},"20.0","105.2","Top 100 pages",[141,164,169],{"x":165,"y":166,"fill":167,"style":168},"686.8","94.5","#b32b30","font-size:11.5px;text-anchor:start;font-weight:700","94%",[141,171,175],{"x":172,"y":173,"fill":174,"style":168},"705.9","114.5","#3f6410","98%",[141,177,179],{"x":160,"y":178,"fill":145,"style":152},"157.2","Rarely visited (2,200 pages)",[141,181,184],{"x":182,"y":183,"fill":167,"style":168},"418.8","146.5","38%",[141,186,189],{"x":187,"y":188,"fill":174,"style":168},"672.4","166.5","91%",[191,192,193],"figcaption",{},"One week of Cloudflare analytics before and after enabling Smart Tiered Cache; hit counts include upper-tier hits.",[27,195,197],{"id":196},"how-the-tiers-work","How the Tiers Work",[14,199,200],{},"With tiering, requests flow in three steps:",[202,203,204,207,210],"ol",{},[35,205,206],{},"The reader's nearest edge checks its cache. Hit: done.",[35,208,209],{},"On a miss, the edge asks its upper tier — a regional data centre that serves many edges. Hit: the edge stores a copy and responds.",[35,211,212],{},"On an upper-tier miss, the upper tier fetches from the origin, stores a copy, and passes it down.",[14,214,215],{},"Because hundreds of edges share a handful of upper tiers, an upper tier sees enough traffic to keep even rarely visited pages warm. And because concurrent requests for the same object are collapsed at the tier, a burst of traffic after a deploy produces one origin request per object instead of one per edge.",[65,217,218,358],{},[68,219,76,224,76,227,76,230,76,233,76,343],{"viewBox":220,"role":71,"ariaLabelledBy":221,"xmlns":75},"0 0 760 294",[222,223],"tier-seq-title","tier-seq-desc",[78,225,226],{"id":222},"Request path for a rarely visited page with tiered caching",[82,228,229],{"id":223},"A reader in Sydney requests a rarely visited page. The Sydney edge misses. With tiered caching, it asks the upper tier in Singapore, which has the page cached and returns it in about 90 milliseconds. Without tiering, the edge would fetch from the origin in Frankfurt, taking about 310 milliseconds. Only an upper-tier miss goes to Frankfurt.",[86,231],{"x":88,"y":88,"width":89,"height":232,"fill":91},"294",[93,234,96,235,96,243,96,248,96,252,96,258,96,262,96,265,96,269,96,272,96,276,96,279,96,282,96,285,96,288,96,294,96,299,96,303,96,306,96,310,96,313,96,317,96,320,96,326,96,330,96,334,96,339,76],{"style":95},[86,236],{"x":144,"y":237,"width":238,"height":239,"rx":240,"fill":241,"stroke":242,"style":139},"56.0","160.0","57.2","8","#f8fafc","#d9e2ef",[86,244],{"x":245,"y":237,"width":238,"height":239,"rx":240,"fill":246,"opacity":247,"stroke":246,"style":139},"210.0","#1982c4","0.14",[86,249],{"x":250,"y":237,"width":238,"height":239,"rx":240,"fill":251,"opacity":247,"stroke":251,"style":139},"390.0","#6a4c93",[86,253],{"x":254,"y":237,"width":238,"height":239,"rx":240,"fill":255,"opacity":256,"stroke":257,"style":139},"570.0","#ffca3a","0.24","#a97b00",[134,259],{"d":260,"fill":137,"stroke":138,"style":261},"M114.0 148.1 L284.0 148.1","stroke-width:1.8px;marker-end:url(#tier-seq-arrow)",[134,263],{"d":264,"fill":137,"stroke":138,"style":261},"M294.0 181.1 L464.0 181.1",[134,266],{"d":267,"fill":137,"stroke":138,"style":268},"M466.0 214.0 L296.0 214.0","stroke-width:1.8px;stroke-dasharray:5 4;marker-end:url(#tier-seq-arrow)",[134,270],{"d":271,"fill":137,"stroke":138,"style":261},"M474.0 261.9 L644.0 261.9",[134,273],{"d":274,"fill":137,"stroke":242,"style":275},"M110.0 115.2 L110.0 277.9","stroke-width:1.5px;stroke-dasharray:4 4",[134,277],{"d":278,"fill":137,"stroke":242,"style":275},"M290.0 115.2 L290.0 277.9",[134,280],{"d":281,"fill":137,"stroke":242,"style":275},"M470.0 115.2 L470.0 277.9",[134,283],{"d":284,"fill":137,"stroke":242,"style":275},"M650.0 115.2 L650.0 277.9",[141,286,287],{"x":143,"y":144,"fill":145,"style":146},"An edge miss with and without a tier",[141,289,293],{"x":290,"y":291,"fill":145,"style":292},"110.0","82.4","font-size:13px;text-anchor:middle;font-weight:700","Reader",[141,295,298],{"x":290,"y":296,"fill":138,"style":297},"99.3","font-size:11px;text-anchor:middle","Sydney",[141,300,302],{"x":301,"y":291,"fill":145,"style":292},"290.0","Edge",[141,304,305],{"x":301,"y":296,"fill":138,"style":297},"SYD",[141,307,309],{"x":308,"y":291,"fill":145,"style":292},"470.0","Upper tier",[141,311,312],{"x":308,"y":296,"fill":138,"style":297},"SIN",[141,314,316],{"x":315,"y":291,"fill":145,"style":292},"650.0","Origin",[141,318,319],{"x":315,"y":296,"fill":138,"style":297},"Frankfurt S3",[141,321,325],{"x":322,"y":323,"fill":145,"style":324},"200.0","140.1","font-size:11.5px;text-anchor:middle","GET \u002Fdocs\u002Fguide\u002Fproxy\u002F",[141,327,329],{"x":143,"y":328,"fill":145,"style":324},"173.1","edge miss → ask upper tier",[141,331,333],{"x":143,"y":332,"fill":138,"style":324},"206.0","tier hit, ~90 ms",[141,335,338],{"x":336,"y":337,"fill":145,"style":324},"560.0","239.0","only on a tier miss (~310",[141,340,342],{"x":336,"y":341,"fill":145,"style":324},"253.9","ms total)",[344,345,96,346,76],"defs",{},[347,348,354,355,96],"marker",{"id":349,"viewBox":350,"refX":240,"refY":351,"markerWidth":352,"markerHeight":352,"orient":353},"tier-seq-arrow","0 0 10 10","5","7","auto-start-reverse","\n      ",[134,356],{"d":357,"fill":138},"M0 0 L10 5 L0 10 z",[191,359,360],{},"Latencies are medians from RUM and CDN logs for Australian readers.",[27,362,364],{"id":363},"step-1-cloudflare-tiered-cache","Step 1: Cloudflare Tiered Cache",[14,366,367],{},"On Cloudflare, Tiered Cache is a zone setting. Smart Tiered Cache, available on all plans, picks the upper tier closest to the origin based on latency measurements; Generic Global Tiered Cache uses several upper tiers; Regional Tiered Cache (Enterprise) adds a middle layer.",[369,370,375],"pre",{"className":371,"code":372,"language":373,"meta":374,"style":374},"language-bash shiki shiki-themes github-light github-dark","curl -X PATCH \"https:\u002F\u002Fapi.cloudflare.com\u002Fclient\u002Fv4\u002Fzones\u002F$ZONE_ID\u002Fcache\u002Ftiered_cache_smart_topology_enable\" \\\n  -H \"Authorization: Bearer $CF_API_TOKEN\" -H \"Content-Type: application\u002Fjson\" --data '{\"value\":\"on\"}'\n","bash","",[39,376,377,407],{"__ignoreMap":374},[378,379,382,386,390,394,397,401,404],"span",{"class":380,"line":381},"line",1,[378,383,385],{"class":384},"sScJk","curl",[378,387,389],{"class":388},"sj4cs"," -X",[378,391,393],{"class":392},"sZZnC"," PATCH",[378,395,396],{"class":392}," \"https:\u002F\u002Fapi.cloudflare.com\u002Fclient\u002Fv4\u002Fzones\u002F",[378,398,400],{"class":399},"sVt8B","$ZONE_ID",[378,402,403],{"class":392},"\u002Fcache\u002Ftiered_cache_smart_topology_enable\"",[378,405,406],{"class":388}," \\\n",[378,408,410,413,416,419,422,425,428,431],{"class":380,"line":409},2,[378,411,412],{"class":388},"  -H",[378,414,415],{"class":392}," \"Authorization: Bearer ",[378,417,418],{"class":399},"$CF_API_TOKEN",[378,420,421],{"class":392},"\"",[378,423,424],{"class":388}," -H",[378,426,427],{"class":392}," \"Content-Type: application\u002Fjson\"",[378,429,430],{"class":388}," --data",[378,432,433],{"class":392}," '{\"value\":\"on\"}'\n",[14,435,436,437,440],{},"Or in Terraform with ",[39,438,439],{},"cloudflare_tiered_cache { zone_id = …, cache_type = \"smart\" }",". For sites on Cloudflare Workers static assets or Pages, the static files are already served from Cloudflare's storage close to the edge, so tiered caching mainly helps when the zone proxies an external origin such as S3 or a VM. The documentation site proxied a Frankfurt S3 bucket through a Cloudflare zone, the case where it matters most.",[27,442,444],{"id":443},"step-2-cloudfront-origin-shield","Step 2: CloudFront Origin Shield",[14,446,447,448,451,452,454],{},"On CloudFront, Origin Shield is enabled per origin and needs a region. Choose the AWS region closest to the origin — for an S3 bucket in ",[39,449,450],{},"eu-central-1",", choose ",[39,453,450],{},":",[369,456,460],{"className":457,"code":458,"language":459,"meta":374,"style":374},"language-json shiki shiki-themes github-light github-dark","\"Origins\": { \"Items\": [{\n  \"Id\": \"docs-s3\",\n  \"DomainName\": \"docs-bucket.s3.eu-central-1.amazonaws.com\",\n  \"OriginShield\": { \"Enabled\": true, \"OriginShieldRegion\": \"eu-central-1\" },\n  \"S3OriginConfig\": { \"OriginAccessIdentity\": \"\" },\n  \"OriginAccessControlId\": \"E2QWRUHAPOMQZL\"\n}]}\n","json",[39,461,462,476,490,503,533,551,562],{"__ignoreMap":374},[378,463,464,467,470,473],{"class":380,"line":381},[378,465,466],{"class":392},"\"Origins\"",[378,468,469],{"class":399},": { ",[378,471,472],{"class":388},"\"Items\"",[378,474,475],{"class":399},": [{\n",[378,477,478,481,484,487],{"class":380,"line":409},[378,479,480],{"class":388},"  \"Id\"",[378,482,483],{"class":399},": ",[378,485,486],{"class":392},"\"docs-s3\"",[378,488,489],{"class":399},",\n",[378,491,493,496,498,501],{"class":380,"line":492},3,[378,494,495],{"class":388},"  \"DomainName\"",[378,497,483],{"class":399},[378,499,500],{"class":392},"\"docs-bucket.s3.eu-central-1.amazonaws.com\"",[378,502,489],{"class":399},[378,504,506,509,511,514,516,519,522,525,527,530],{"class":380,"line":505},4,[378,507,508],{"class":388},"  \"OriginShield\"",[378,510,469],{"class":399},[378,512,513],{"class":388},"\"Enabled\"",[378,515,483],{"class":399},[378,517,518],{"class":388},"true",[378,520,521],{"class":399},", ",[378,523,524],{"class":388},"\"OriginShieldRegion\"",[378,526,483],{"class":399},[378,528,529],{"class":392},"\"eu-central-1\"",[378,531,532],{"class":399}," },\n",[378,534,536,539,541,544,546,549],{"class":380,"line":535},5,[378,537,538],{"class":388},"  \"S3OriginConfig\"",[378,540,469],{"class":399},[378,542,543],{"class":388},"\"OriginAccessIdentity\"",[378,545,483],{"class":399},[378,547,548],{"class":392},"\"\"",[378,550,532],{"class":399},[378,552,554,557,559],{"class":380,"line":553},6,[378,555,556],{"class":388},"  \"OriginAccessControlId\"",[378,558,483],{"class":399},[378,560,561],{"class":392},"\"E2QWRUHAPOMQZL\"\n",[378,563,565],{"class":380,"line":564},7,[378,566,567],{"class":399},"}]}\n",[14,569,570],{},"CloudFront already has regional edge caches between edges and origins by default; Origin Shield adds one more centralized layer in front of the origin. It is billed per request that reaches the shield, so it pays off when it significantly reduces origin requests — heavily with S3 cross-region data transfer, less so for an origin in the same region as most readers.",[27,572,574],{"id":573},"step-3-choosing-the-tier-location","Step 3: Choosing the Tier Location",[14,576,577,578,581,582,25],{},"The upper tier should be close to the origin, not to the readers: the expensive and slow part is the trip to the origin, and a tier near the origin makes that trip short while remaining reachable from all edges over the CDN's backbone. Placing CloudFront's shield in ",[39,579,580],{},"us-east-1"," for a Frankfurt bucket in an early test made things worse for European readers — edge misses crossed the Atlantic twice — and origin requests fell by less than with the shield in ",[39,583,450],{},[65,585,586,682],{},[68,587,76,592,76,595,76,598,76,601,76,675],{"viewBox":588,"role":71,"ariaLabelledBy":589,"xmlns":75},"0 0 760 246",[590,591],"tier-where-title","tier-where-desc",[78,593,594],{"id":590},"Choosing an upper tier location relative to origin and readers",[82,596,597],{"id":591},"The root asks where the origin is. For a single-region origin such as S3 in Frankfurt, put the tier in the same region to minimise origin round trips. For an origin already on the CDN, such as Workers static assets or Pages, tiering adds little. For multiple origins in different regions, use the CDN's smart or global topology rather than one fixed region.",[86,599],{"x":88,"y":88,"width":89,"height":600,"fill":91},"246",[93,602,96,603,96,607,96,611,96,614,96,618,96,623,96,626,96,629,96,632,96,635,96,638,96,642,96,647,96,651,96,655,96,658,96,661,96,664,96,669,96,672,76],{"style":95},[86,604],{"x":605,"y":151,"width":606,"height":100,"rx":240,"fill":251,"opacity":247,"stroke":251,"style":139},"250.0","260.0",[134,608],{"d":609,"fill":137,"stroke":138,"style":610},"M380.0 111.0 L380.0 132.0","stroke-width:2px",[134,612],{"d":613,"fill":137,"stroke":138,"style":610},"M134.0 132.0 L626.0 132.0",[134,615],{"d":616,"fill":137,"stroke":138,"style":617},"M134.0 132.0 L134.0 150.0","stroke-width:2px;marker-end:url(#tier-where-arrow)",[86,619],{"x":160,"y":131,"width":620,"height":621,"rx":240,"fill":111,"opacity":622,"stroke":113,"style":139},"228.0","75.5","0.2",[134,624],{"d":625,"fill":137,"stroke":138,"style":617},"M380.0 132.0 L380.0 150.0",[86,627],{"x":628,"y":131,"width":620,"height":621,"rx":240,"fill":241,"stroke":242,"style":139},"266.0",[134,630],{"d":631,"fill":137,"stroke":138,"style":617},"M626.0 132.0 L626.0 150.0",[86,633],{"x":634,"y":131,"width":620,"height":621,"rx":240,"fill":246,"opacity":247,"stroke":246,"style":139},"512.0",[141,636,637],{"x":143,"y":144,"fill":145,"style":146},"Where should the upper tier be?",[141,639,641],{"x":143,"y":640,"fill":145,"style":292},"90.2","Where does the origin live?",[141,643,646],{"x":127,"y":644,"fill":174,"style":645},"170.0","font-size:11px;text-anchor:middle;font-weight:700","One region (S3 or a VM)",[141,648,650],{"x":127,"y":649,"fill":145,"style":292},"190.3","Tier next to origin",[141,652,654],{"x":127,"y":653,"fill":138,"style":297},"207.2","e.g. eu-central-1 shield",[141,656,657],{"x":143,"y":644,"fill":138,"style":645},"On the CDN itself",[141,659,660],{"x":143,"y":649,"fill":145,"style":292},"Little benefit",[141,662,663],{"x":143,"y":653,"fill":138,"style":297},"Workers assets or Pages",[141,665,668],{"x":666,"y":644,"fill":667,"style":645},"626.0","#166a9e","Several regions",[141,670,671],{"x":666,"y":649,"fill":145,"style":292},"Smart or global topology",[141,673,674],{"x":666,"y":653,"fill":138,"style":297},"let the CDN choose",[344,676,96,677,76],{},[347,678,354,680,96],{"id":679,"viewBox":350,"refX":240,"refY":351,"markerWidth":352,"markerHeight":352,"orient":353},"tier-where-arrow",[134,681],{"d":357,"fill":138},[191,683,684],{},"A tier near readers but far from the origin can increase latency; the test with a US shield for a Frankfurt bucket did.",[27,686,688],{"id":687},"deploys-and-purges-with-tiers","Deploys and Purges With Tiers",[14,690,691,692,696],{},"Tiers add a cache layer that purges must reach. Both Cloudflare and CloudFront purge upper tiers along with edges, so a purge after deploy works as before, as in ",[21,693,695],{"href":694},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fpurging-the-cdn-cache-after-a-static-deploy\u002F","Purging the CDN Cache After a Static Deploy",". What changes is the refill: after a purge, the first request per object in each tier region goes to the origin, and every edge after that fills from the tier. On the documentation site, origin requests in the ten minutes after a full purge fell from about 48,000 to 6,500 with tiering, which removed the origin load spike that had occasionally caused S3 throttling (503 SlowDown) on large deploys.",[14,698,699,700,703,704,706,707,710],{},"Watch one more thing after enabling tiers: the cache status field in logs gains new values (",[39,701,702],{},"Hit"," from the upper tier appears as a hit at the edge on Cloudflare, while CloudFront reports ",[39,705,702],{}," or ",[39,708,709],{},"RefreshHit"," at the edge and records shield hits separately), so dashboards that computed hit ratio from edge status alone may need adjusting to count tier hits correctly.",[27,712,714],{"id":713},"measured-impact","Measured Impact",[14,716,717],{},"Two weeks before and after enabling Smart Tiered Cache on the Cloudflare zone in front of the Frankfurt bucket:",[719,720,721,736],"table",{},[722,723,724],"thead",{},[725,726,727,731,733],"tr",{},[728,729,730],"th",{},"Measure",[728,732,153],{},[728,734,735],{},"Smart Tiered Cache",[737,738,739,751,760,771,782,793,804],"tbody",{},[725,740,741,745,748],{},[742,743,744],"td",{},"HTML hit ratio (edge + tier)",[742,746,747],{},"71%",[742,749,750],{},"95%",[725,752,753,756,758],{},[742,754,755],{},"Rarely visited page hit ratio",[742,757,184],{},[742,759,189],{},[725,761,762,765,768],{},[742,763,764],{},"Origin requests per day",[742,766,767],{},"118,000",[742,769,770],{},"17,000",[725,772,773,776,779],{},[742,774,775],{},"S3 GET requests and egress cost per month",[742,777,778],{},"61 USD",[742,780,781],{},"11 USD",[725,783,784,787,790],{},[742,785,786],{},"TTFB p75 for edge misses, APAC readers",[742,788,789],{},"310 ms",[742,791,792],{},"120 ms",[725,794,795,798,801],{},[742,796,797],{},"LCP p75, APAC readers",[742,799,800],{},"2.2 s",[742,802,803],{},"1.8 s",[725,805,806,809,812],{},[742,807,808],{},"Origin requests in 10 min after full purge",[742,810,811],{},"~48,000",[742,813,814],{},"~6,500",[65,816,817,862],{},[68,818,76,823,76,826,76,829,76,832],{"viewBox":819,"role":71,"ariaLabelledBy":820,"xmlns":75},"0 0 760 295",[821,822],"tier-origin-title","tier-origin-desc",[78,824,825],{"id":821},"Daily origin requests before and after tiered caching",[82,827,828],{"id":822},"Vertical bars of origin requests per day. Edges only 118,000. With Smart Tiered Cache 17,000, an 86 percent reduction.",[86,830],{"x":88,"y":88,"width":89,"height":831,"fill":91},"295",[93,833,96,834,96,839,96,844,96,847,96,849,96,853,96,856,96,860,76],{"style":95},[86,835],{"x":836,"y":837,"width":838,"height":644,"rx":120,"fill":104,"opacity":105,"stroke":106,"style":107},"165.0","76.0","90.0",[86,840],{"x":841,"y":842,"width":838,"height":843,"rx":120,"fill":111,"opacity":112,"stroke":113,"style":107},"505.0","221.5","24.5",[134,845],{"d":846,"fill":137,"stroke":138,"style":139},"M30.0 246.0 L730.0 246.0",[141,848,764],{"x":143,"y":144,"fill":145,"style":146},[141,850,767],{"x":245,"y":851,"fill":167,"style":852},"69.0","font-size:12px;text-anchor:middle;font-weight:700",[141,854,153],{"x":245,"y":855,"fill":138,"style":324},"264.0",[141,857,770],{"x":858,"y":859,"fill":174,"style":852},"550.0","214.5",[141,861,735],{"x":858,"y":855,"fill":138,"style":324},[191,863,864],{},"Two-week averages from S3 request metrics; site traffic was similar in both periods.",[27,866,868],{"id":867},"pitfalls-rollback","Pitfalls & Rollback",[32,870,871,878,888,894,904],{},[35,872,873,877],{},[874,875,876],"strong",{},"Tier far from the origin."," Adds a long hop and saves little; keep the tier near the origin.",[35,879,880,883,884,887],{},[874,881,882],{},"Expecting tiering to fix bad headers."," ",[39,885,886],{},"no-store"," or cookie-varying responses are not cached at any tier.",[35,889,890,893],{},[874,891,892],{},"Paying for Origin Shield without measuring."," When the origin is already close and cheap, the extra request charges can exceed savings.",[35,895,896,899,900,25],{},[874,897,898],{},"Fragmented cache keys."," Tiers multiply the benefit of a clean key; fix query-string fragmentation first, as in ",[21,901,903],{"href":902},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fcache-keys-and-query-strings-on-cdns\u002F","Cache Keys and Query Strings on CDNs",[35,905,906,909],{},[874,907,908],{},"Rollback:"," both features are single settings; disabling them returns to edge-only caching immediately.",[27,911,913],{"id":912},"conclusion","Conclusion",[14,915,916],{},"Tiered caching is the missing piece for static sites with many rarely visited pages and a global audience: edge misses are served from a regional tier near the origin, so the origin sees a fraction of the traffic and distant readers get faster first views. Put the tier next to the origin, fix the cache key first, and measure origin requests and miss latency. On this site it cut origin requests by 86% and TTFB on edge misses by more than half.",[27,918,920],{"id":919},"faq","FAQ",[922,923,925],"h3",{"id":924},"what-is-tiered-caching","What is tiered caching?",[14,927,928],{},"A CDN setup where edge locations that miss the cache ask a smaller set of upper-tier or regional caches before going to the origin. Only a miss at the upper tier reaches the origin, so origin requests fall and edges in regions with little traffic get warm content faster.",[922,930,932],{"id":931},"what-is-an-origin-shield","What is an origin shield?",[14,934,935],{},"CloudFront's name for a designated regional cache that all edge locations use as their upper tier for a distribution. It collapses requests from many edges into one request to the origin per object.",[922,937,939],{"id":938},"do-static-sites-benefit-from-tiered-caching","Do static sites benefit from tiered caching?",[14,941,942],{},"Yes, especially sites with a global audience, many pages that each get modest traffic, short HTML cache lifetimes that expire often, and origins that are slow or charge for egress, such as object storage in a single region or a small VM.",[922,944,946],{"id":945},"does-tiered-caching-add-latency","Does tiered caching add latency?",[14,948,949],{},"On an upper-tier hit it adds one hop between the edge and the tier, typically 20 to 60 milliseconds, but saves the much longer trip to a distant origin. On an edge hit nothing changes. On the site measured here, median TTFB for edge misses fell from 310 to 120 milliseconds.",[27,951,953],{"id":952},"related","Related",[32,955,956,964,969,976,983],{},[35,957,958,883,961,963],{},[874,959,960],{},"Parent:",[21,962,24],{"href":23}," — the full caching strategy.",[35,965,966,968],{},[21,967,903],{"href":902}," — fixing fragmentation first.",[35,970,971,975],{},[21,972,974],{"href":973},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fcaching-404s-and-redirects-at-the-edge\u002F","Caching 404s and Redirects at the Edge"," — other responses that reach the origin.",[35,977,978,982],{},[21,979,981],{"href":980},"\u002Fproduction-ready-deployment-cicd-workflows\u002Fmonitoring-static-sites-in-production\u002Falerting-on-cache-hit-ratio-drops\u002F","Alerting on Cache Hit Ratio Drops"," — keeping the ratio high.",[35,984,985,989],{},[21,986,988],{"href":987},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Flargest-contentful-paint-optimization-for-static-sites\u002Fimproving-ttfb-for-static-html\u002F","Improving TTFB for Static HTML"," — TTFB beyond caching.",[991,992,993],"style",{},"html pre.shiki code .sScJk, html code.shiki .sScJk{--shiki-default:#6F42C1;--shiki-dark:#B392F0}html pre.shiki code .sj4cs, html code.shiki .sj4cs{--shiki-default:#005CC5;--shiki-dark:#79B8FF}html pre.shiki code .sZZnC, html code.shiki .sZZnC{--shiki-default:#032F62;--shiki-dark:#9ECBFF}html pre.shiki code .sVt8B, html code.shiki .sVt8B{--shiki-default:#24292E;--shiki-dark:#E1E4E8}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: 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SSGs","\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002F",{"name":24,"item":23},{"name":5,"item":1022},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Ftiered-caching-and-origin-shield\u002F","2026-09-25","Use Cloudflare Tiered Cache or CloudFront Origin Shield so edge misses on a static site are served from a regional tier instead of the origin, with measured 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Time",{"path":1412,"title":1413},"\u002Fchoosing-the-right-static-site-generator-for-production\u002Ftechnical-seo-for-static-sites\u002Fcanonical-urls-and-duplicate-content-on-static-sites","Canonical URLs and Duplicate Content on Static Sites",{"path":1415,"title":1416},"\u002Fchoosing-the-right-static-site-generator-for-production\u002Ftechnical-seo-for-static-sites\u002Ffixing-pages-crawled-but-not-indexed-on-static-sites","Fixing Pages Crawled but Not Indexed on Static Sites",{"path":1418,"title":1419},"\u002Fchoosing-the-right-static-site-generator-for-production\u002Ftechnical-seo-for-static-sites\u002Ffixing-soft-404s-on-static-hosts","Fixing Soft 404s on Static Hosts",{"path":1421,"title":1422},"\u002Fchoosing-the-right-static-site-generator-for-production\u002Ftechnical-seo-for-static-sites\u002Fgenerating-breadcrumb-structured-data-in-astro","Generating Breadcrumb Structured Data in Astro",{"path":1424,"title":1425},"\u002Fchoosing-the-right-static-site-generator-for-production\u002Ftechnical-seo-for-static-sites\u002Fgenerating-sitemaps-for-large-static-sites","Generating Sitemaps for Large Static Sites",{"path":1427,"title":1428},"\u002Fchoosing-the-right-static-site-generator-for-production\u002Ftechnical-seo-for-static-sites","Technical SEO for Static Sites",{"path":1430,"title":1431},"\u002Fchoosing-the-right-static-site-generator-for-production\u002Ftechnical-seo-for-static-sites\u002Frobots-txt-and-noindex-for-preview-and-staging","robots.txt and noindex for Preview and Staging",{"path":1433,"title":1434},"\u002Fchoosing-the-right-static-site-generator-for-production\u002Ftechnical-seo-for-static-sites\u002Frss-and-atom-feeds-for-static-blogs","RSS and Atom Feeds for Static Blogs",{"path":1436,"title":1437},"\u002Fchoosing-the-right-static-site-generator-for-production\u002Ftechnical-seo-for-static-sites\u002Fseo-safe-pagination-and-tag-pages","SEO-Safe Pagination and Tag Pages",{"path":1439,"title":1440},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fcache-busting-with-content-hashed-filenames","Cache Busting with Content-Hashed Filenames",{"path":1442,"title":1443},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fcache-control-headers-for-static-sites-in-nginx","Cache-Control Headers for Static Sites in Nginx",{"path":1445,"title":1446},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fcache-control-headers-on-s3-and-cloudfront","Cache-Control Headers on S3 and CloudFront",{"path":1448,"title":1449},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fcache-control-headers-on-vercel-for-static-sites","Cache-Control Headers on Vercel for Static Sites",{"path":1451,"title":903},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fcache-keys-and-query-strings-on-cdns",{"path":1453,"title":974},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fcaching-404s-and-redirects-at-the-edge",{"path":1455,"title":1456},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fcloudflare-vs-cloudfront-cache-hit-ratios-for-static-sites","Cloudflare vs CloudFront Cache Hit Ratios for Static Sites",{"path":1458,"title":1459},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Ffixing-stale-html-after-deploys-on-cloudflare","Fixing Stale HTML After Deploys on Cloudflare",{"path":1461,"title":24},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs",{"path":1463,"title":695},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fpurging-the-cdn-cache-after-a-static-deploy",{"path":1465,"title":1466},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fsetting-cache-control-headers-on-cloudflare-pages","Cache-Control Headers on Cloudflare Pages",{"path":1468,"title":1469},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fsetting-up-proper-cache-headers-on-netlify","Proper Cache Headers on Netlify for SSGs",{"path":1471,"title":46},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcdn-caching-rules-for-ssgs\u002Fstale-while-revalidate-for-static-html",{"path":1033,"title":5},{"path":1474,"title":1475},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Fcode-splitting-and-module-preload-in-vite-based-ssgs","Code Splitting and Module Preload in Vite-Based SSGs",{"path":1477,"title":1478},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Ffixing-missing-tailwind-classes-in-production-builds","Fixing Missing Tailwind Classes in Production Builds",{"path":1480,"title":1481},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Ffixing-unused-javascript-warnings-on-static-pages","Fixing Unused JavaScript Warnings on Static Pages",{"path":1483,"title":1484},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization","CSS and JavaScript Asset Optimization",{"path":1486,"title":1487},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Finlining-critical-css-on-static-sites","Inlining Critical CSS on Static Sites",{"path":1489,"title":1490},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Fkeeping-tailwind-css-output-small-on-static-sites","Keeping Tailwind CSS Output Small on Static Sites",{"path":1492,"title":1493},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Fminifying-html-css-and-js-in-eleventy","Minifying HTML, CSS and JS in Eleventy",{"path":1495,"title":1496},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Fprecompressing-assets-with-brotli-and-zstd","Precompressing Assets with Brotli and Zstd",{"path":1498,"title":1499},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Fpurging-unused-css-with-tailwind-and-lightningcss","Purging Unused CSS with Tailwind and Lightning CSS",{"path":1501,"title":1502},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Fsvg-icon-sprites-vs-inline-icons","SVG Icon Sprites vs Inline Icons",{"path":1504,"title":1505},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcss-and-javascript-asset-optimization\u002Ftailwind-v4-in-astro-without-postcss-plugins","Tailwind v4 in Astro Without PostCSS Plugins",{"path":1507,"title":1508},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Fcls-from-client-side-rendered-components","CLS from Client-Side Rendered Components",{"path":1510,"title":1511},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Fdebugging-cls-with-the-layout-instability-api","Debugging CLS with the Layout Instability API",{"path":1513,"title":1514},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Feliminating-layout-shift-from-web-fonts","Eliminating Layout Shift From Web Fonts",{"path":1516,"title":1517},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Ffixing-cls-from-cookie-banners","Fixing CLS from Cookie Banners",{"path":1519,"title":1520},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Ffixing-cls-from-dynamic-table-of-contents-widgets","Fixing CLS From Dynamic Table of Contents Widgets",{"path":1522,"title":1523},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Ffixing-cls-from-images-without-dimensions-in-markdown","Fixing CLS From Images Without Dimensions in Markdown",{"path":1525,"title":1526},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Ffixing-cls-from-late-loading-embeds","Fixing CLS From Late-Loading Embeds",{"path":1528,"title":1529},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Ffixing-cls-from-sticky-headers-and-anchor-links","Fixing CLS from Sticky Headers and Anchor Links",{"path":1531,"title":1532},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites","Cumulative Layout Shift Fixes for Static Sites",{"path":1534,"title":1535},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Fmeasuring-cls-in-the-field-with-web-vitals-js","Measuring CLS in the Field With web-vitals.js",{"path":1537,"title":1538},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Freserving-space-for-ad-and-promo-slots","Reserving Space for Ad and Promo Slots",{"path":1540,"title":1541},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fcumulative-layout-shift-fixes-for-static-sites\u002Freserving-space-for-images-and-embeds-to-stop-layout-shift","Reserving Space for Images and Embeds",{"path":1543,"title":1544},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Fauditing-font-payload-per-page","Auditing Font Payload per Page",{"path":1546,"title":1547},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Ffixing-invisible-text-while-web-fonts-load","Fixing Invisible Text While Web Fonts Load",{"path":1549,"title":1550},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Ffont-display-optional-vs-swap","font-display: optional vs swap",{"path":1552,"title":1553},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites","Font Loading Strategies for Static Sites",{"path":1555,"title":1556},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Fmetric-matched-fallback-fonts-with-size-adjust","Metric-Matched Fallback Fonts with size-adjust",{"path":1558,"title":1559},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Fpreloading-fonts-without-double-downloads","Preloading Fonts Without Double Downloads",{"path":1561,"title":1562},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Fself-hosted-fonts-vs-google-fonts-for-static-sites","Self-Hosted Fonts vs Google Fonts for Static Sites",{"path":1564,"title":1565},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Fself-hosting-google-fonts-to-eliminate-layout-shift","Self-Host Google Fonts to Eliminate Layout Shift",{"path":1567,"title":1568},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Fsubsetting-variable-fonts-for-faster-first-render","Subsetting Variable Fonts for Faster First Render",{"path":1570,"title":1571},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Fusing-system-font-stacks-to-skip-webfonts","Using System Font Stacks to Skip Web Fonts",{"path":1573,"title":1574},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Ffont-loading-strategies-for-static-sites\u002Fvariable-fonts-vs-static-weights","Variable Fonts vs Static Weights",{"path":1576,"title":1577},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Fart-direction-with-the-picture-element","Art Direction with the Picture Element",{"path":1579,"title":1580},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Fblur-up-placeholders-with-lqip","Blur-Up Placeholders with LQIP",{"path":1582,"title":1583},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Fbuilding-an-image-cdn-pipeline-for-static-sites","Building an Image CDN Pipeline for Static Sites",{"path":1585,"title":1586},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Fcaching-processed-images-between-builds","Caching Processed Images Between Builds",{"path":1588,"title":1589},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Ffixing-blurry-images-from-astro-assets-resizing","Fixing Blurry Images From astro:assets Resizing",{"path":1591,"title":1592},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Fgenerating-open-graph-images-at-build-time","Generating Open Graph Images at Build Time",{"path":1594,"title":1595},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro","Image Optimization Pipelines in Astro",{"path":1597,"title":1598},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Flazy-loading-images-without-hurting-lcp","Lazy-Loading Images Without Hurting LCP",{"path":1600,"title":1601},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Foptimizing-webp-images-in-hugo-without-plugins","Optimizing WebP Images in Hugo Without Plugins",{"path":1603,"title":1604},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Fresponsive-images-with-srcset-in-eleventy","Responsive Images with srcset in Eleventy",{"path":1606,"title":1607},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Fserving-astro-images-through-cloudflare-image-resizing","Serving Astro Images Through Cloudflare Image Resizing",{"path":1609,"title":1610},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fimage-optimization-pipelines-in-astro\u002Fserving-avif-with-fallbacks-on-static-sites","Serving AVIF With Fallbacks on Static Sites",{"path":1612,"title":1018},"\u002Fperformance-optimization-core-web-vitals-for-ssgs",{"path":1614,"title":1615},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Fastro-islands-vs-full-hydration-performance","Astro Islands vs Full Hydration Performance",{"path":1617,"title":1618},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Fbreaking-up-long-tasks-on-static-sites","Breaking Up Long Tasks on Static Sites",{"path":1620,"title":1621},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Fdeferring-hydration-with-client-visible-in-astro","Deferring Hydration with client:visible in Astro",{"path":1623,"title":1624},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Ffixing-hydration-mismatch-errors-in-astro-islands","Fixing Hydration Mismatch Errors in Astro Islands",{"path":1626,"title":1627},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Ffixing-poor-inp-on-static-pages-with-heavy-widgets","Fixing Poor INP on Static Pages With Heavy Widgets",{"path":1629,"title":1630},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Fhow-to-reduce-bundle-size-in-eleventy-builds","How to Reduce Bundle Size in Eleventy Builds",{"path":1632,"title":1633},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering","JavaScript Hydration & Partial Rendering",{"path":1635,"title":1636},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Fmeasuring-inp-on-static-sites-with-real-user-monitoring","Measuring INP on Static Sites with RUM",{"path":1638,"title":1639},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Fpreact-vs-react-islands-bundle-size","Preact vs React Islands Bundle Size",{"path":1641,"title":1642},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Freplacing-react-islands-with-web-components","Replacing React Islands with Web Components",{"path":1644,"title":1645},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Fjavascript-hydration-partial-rendering\u002Fserver-islands-in-astro","Server Islands in Astro",{"path":1647,"title":1648},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Flargest-contentful-paint-optimization-for-static-sites\u002Feliminating-render-blocking-css-on-static-sites","Eliminating Render-Blocking CSS on Static Sites",{"path":1650,"title":1651},"\u002Fperformance-optimization-core-web-vitals-for-ssgs\u002Flargest-contentful-paint-optimization-for-static-sites\u002Ffixing-lcp-on-text-heavy-documentation-pages","Fixing LCP on Text-Heavy Documentation 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