urn:uuid:5c54a0e5-86ad-5891-8f5e-002009683e3c Topic: WebPerf – Ctrl blog Daniel Aleksandersen https://www.daniel.priv.no/ Copyright © 2021 Daniel Aleksandersen. https://www.ctrl.blog/assets/favicon/favicon.svg 2021-02-22T03:28:00Z weekly 10 urn:uuid:08f69157-4809-4616-a48c-2a402f388b33 2020-12-16T09:21:00Z 2020-12-16T09:21:00Z A technical and privacy review of Cloudflare Web Analytics Cloudflare has launched a new free web analytics/visitor-counting service. It promises to put end-user privacy first. The service has plenty of room to improve. <p>Last week, Cloudflare announced its new Web Analytics service: a cost-free stand-alone product for counting website visitors. In its announcement, Cloudflare promised that its new service puts privacy first, doesn’t collect any personal information, and doesn’t use persistent tracking such as cookies.</p> <p><a href="https://www.ctrl.blog/entry/review-cloudflare-analytics.html#src=feed">Read more …</a></p> urn:uuid:bff9371d-fc07-43f8-be7d-288af99a6078 2020-11-30T22:43:00Z 2020-11-30T22:43:00Z Chrome to remove HTTP/2 Push Chrome intends to remove support for server push; an underutilized performance feature introduced in HTTP/2. It cites low usage and implementation complexity. <p>Chromium developers have announced that they plan to remove support for HTTP/2 server push from the market-leading browser engine. Server push lets web servers preemptively send clients resources it expects them to request later. The technique can reduce the number of network round-trips required before the client has all the resources it needs to display a page. The announcement cited high implementation complexity, low adoption among websites, and questionable performance gains as the reason for the removal.</p> <p><a href="https://www.ctrl.blog/entry/http2-push-chromium-deprecation.html#src=feed">Read more …</a></p> urn:uuid:1dd51cf1-fea4-449e-a60c-89603e987aa7 2020-10-27T03:18:00Z 2021-02-22T03:28:00Z Twitter preconnects to the wrong domains Twitter tried to reduce load times for external links, but made things slower instead. It mistakenly normalizes domains to a point where they’re no longer useful. <p>Twitter tried to reduce load times for external links, but it made things slower instead. It mistakenly normalizes domain names to a point where they’re no longer can be used to fulfill their task.</p> <p><a href="https://www.ctrl.blog/entry/twitter-preconnects.html#src=feed">Read more …</a></p> urn:uuid:efb19ac5-2bd1-4df5-9732-19ccb34dce9b 2020-07-14T02:26:00Z 2020-07-14T02:26:00Z Comparing file sizes of lossless WebP vs FLIF vs PNG FLIF makes big claims on file size savings but lossless WebP delivers. <p>Last weekend, I compared two lossy image formats: AVIF and WebP. Today, I’m comparing the file size reduction of two lossless formats — FLIF and lossless WebP — compared to heavily optimized PNG images.</p> <p><a href="https://www.ctrl.blog/entry/webp-flif-comparison.html#src=feed">Read more …</a></p> urn:uuid:820202d3-0f34-4f2e-9b8c-b87a7dfb549c 2020-07-12T14:19:00Z 2020-07-12T14:19:00Z Comparing AVIF vs WebP file sizes at the same DSSIM I got impressive results when comparing AVIF and WebP images at the same visual quality (using DSSIM). AVIF’s 85th percentile was the same as WebP’s 15th! <p>I wanted to improve the image quality on the blog while keeping the file sizes small. To this end, I wanted to improve the visual quality of my WebP images and explore the new AVIF image format. Here are my findings from comparing WebP and AVIF to JPEGs at the same visual quality.</p> <p><a href="https://www.ctrl.blog/entry/webp-avif-comparison.html#src=feed">Read more …</a></p>