RLI (Recently Logged-In) Browser Cache Bypassing
Tim Vereecke (@TimVereecke) loves speeding up websites and likes to understand the technical and business aspects of WebPerf since 15+ years. He is a web performance architect at Akamai and also runs scalemates.com: the largest (and fastest) scale modeling website on the planet. Delivering cached HTML pages to recently logged in (=RLI) visitors is unfortunately a guarantee to frustrate users! On w
CDN-Cache-Control: Precision Control for your CDN(s)
With these headers and directives set, intermediaries know whether it’s safe for something to be cached, how long it should be cached, and what to do once it’s no longer permitted to remain in cache. Interaction with other Cloudflare featuresEdge Cache TTL Page RuleEdge Cache TTL is a page rule that is meant to override the amount of time an asset is cached on the edge (Cloudflare data centers) an
The perils of the “real” client IP | adam-p
## SummaryThis post ended up being incredibly long comprehensive. I’m afraid that many people won’t read enough to get everything that’s important, so here are the key points: When deriving the “real client IP address” from the X-Forwarded-For header, use the rightmost IP in the list. The leftmost IP in the XFF header is commonly considered to be “closest to the client” and “most real”, but it’s t
Fastly Launches Highly-Secure Serverless JavaScript
Talk to an expertTry Fastly free Compute@Edge’s unique isolation sandbox technology enables a fast, secure JavaScript experience as developers continue to enter into the growing serverless computing landscape. SAN FRANCISCO -- JULY 21, 2021 -- Fastly, Inc. (NYSE: FSLY), a global edge cloud platform provider, today announced the availability of JavaScript in Compute@Edge, allowing developers to bui
Introducing CloudFront Functions – Run Your Code at the Edge with Low Latency at Any Scale | Amazon Web Services
AWS News Blog Introducing CloudFront Functions – Run Your Code at the Edge with Low Latency at Any Scale With Amazon CloudFront, you can securely deliver data, videos, applications, and APIs to your customers globally with low latency and high transfer speeds. To offer a customized experience and the lowest possible latency, many modern applications execute some form of logic at the edge. The use
Content delivery networks (CDNs)
Content delivery networks (CDNs) improve site performance by using a distributed network of servers to deliver resources to users. Because CDNs reduce server load, they reduce server costs and are well-suited to handling traffic spikes. This article discusses how CDNs work and provides platform-agnostic guidance on choosing, configuring, and optimizing a CDN setup. Overview #A content delivery net
An Update on CDNJS
When you loaded this blog, a file was delivered to your browser called jquery-3.2.1.min.js. jQuery is a library which makes it easier to build websites, and was at one point included on as many as 74.1% of all websites. A full eighteen million sites include jQuery and other libraries using one of the most popular tools on Earth: CDNJS. Beginning about a month ago Cloudflare began to take a more ac
How to get Faster Websites With Early and Priority Hints
Talk to an expertTry Fastly free How to get Faster Websites With Early and Priority HintsWebsites still load too slowly. During the most critical time in the page load lifecycle, your connection is often almost totally idle. A new technology proposed by Fastly engineer Kazuho Oku hopes to make better use of that critical first couple of seconds. Have you ever gone to a site on your phone only to e
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CloudFront Functions: 20% faster than CloudFlare Workers, 230% faster than Lambda@Edge