![【Unity】Unite Tokyo 2019 「大量のアセットも怖くない!~HTTP/2による高速な通信の実装例~」講演と壇上では語られなかった6つのこと。 - SEGA TECH Blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/6688ef6352c712bbdab0565066154002567b8171/height=288;version=1;width=512/https%3A%2F%2Fcdn-ak.f.st-hatena.com%2Fimages%2Ffotolife%2Fs%2Fsgtech%2F20191028%2F20191028000857.jpg)
Optimizing HTTP/2 prioritization with BBR and tcp_notsent_lowat10/12/2018 Getting the best end-user performance from HTTP/2 requires good support for resource prioritization. While most web servers support HTTP/2 prioritization, getting it to work well all the way to the browser requires a fair bit of coordination across the networking stack. This article will expose some of the interactions betwe
(注:2017/04/20、いただいたフィードバックを元に翻訳を修正いたしました。修正内容については、 こちら を参照ください。) 要約 HTTP/2 にはHTTP/1.xに比べて多数の改良点がありますが、 カオステスト を行ったところ、HTTP/2のパフォーマンスがHTTP/1より劣る状況があることが分かりました。 ネットワーク上にパケット損失がある場合、TCP層での輻輳制御によって、少数のTCPコネクションの中に多重化されているHTTP/2ストリームがスロットリングされます。さらに、TCPリトライのロジックにより、リトライが行われている間、1つのTCPコネクションに影響しているパケット損失が、いくつかのHTTP/2ストリームに同時に強い影響を与えます。言い換えれば、ヘッドオブラインブロッキングが事実上、ネットワーク階層の レイヤ7 から レイヤ4 へ移動したということです。 背景とサー
日本経済新聞は国内を代表する経済誌だ。その電子版はwebでの継続課金を大成功させ、いまや50万以上の有料会員を擁するモンスターサイトだ。 その日経電子版が11月6日に全面リニューアルしたのだが、公開後、web業界がにわかにざわついた。表示速度が爆速だったのだ。日経公式もモバイルで2倍の表示速度を達成したと堂々と宣言していた。 webサービスは継続率こそ神KPIで、その継続率には速度が大きく影響する。 これはチェキらないとヤバイと感じ、友人のkitakさんとスピードの秘密を調査してみた。 Fastlyをコンテンツキャッシュに使う殆どのデータはFastlyを経由して取得されていた。Fastlyは最近注目を集めているCDN(世界中にエッジサーバーを配置し、高速にコンテンツを配信するサービス)で、非常に高機能でユニークなサービスだ。 一般に、CDNはいったん世界中にコンテンツをばらまくと、それを無
"HTTP/2 push will solve that" is something I've heard a lot when it comes to page load performance problems, but I didn't know much about it, so I decided to dig in. HTTP/2 push is more complicated and low-level than I initially thought, but what really caught me off-guard is how inconsistent it is between browsers – I'd assumed it was a done deal & totally ready for production. This isn't an "HTT
Envoy Tweet Docs C++ L7 proxy and communication bus Envoy is an open source edge and service proxy, from the developers at Lyft Out of process architecture Envoy is a self contained server. It runs alongside any application language or framework. At Lyft we currently use it to proxy for PHP, Python, Go, Java, and C++. HTTP/2 Envoy has first class support for HTTP/2 for both incoming and outgoing c
How to Use Multiple GitHub Accounts Git is a popular tool for version control in software development. It is not uncommon to use multiple Git accounts. Correctly configuring and switching Git accounts is challenging. In this article, we show what Git provides for account configuration, its limitations, and the solution to switch accounts automatically based on a project parent directory location.
HPACK: the silent killer (feature) of HTTP/2 Loading... If you have experienced HTTP/2 for yourself, you are probably aware of the visible performance gains possible with HTTP/2 due to features like stream multiplexing, explicit stream dependencies, and Server Push. There is however one important feature that is not obvious to the eye. This is the HPACK header compression. Current implementation o
Two weeks ago CloudFlare announced that it was supporting HTTP/2 Server Push for all our customers. By simply adding a Link header to an HTTP response specifying preload CloudFlare would automatically push items to web browsers that support Server Push. To illustrate how easy this is I create a small PHP page that uses the PHP header function to insert appropriate Link headers to push images to th
Announcing Support for HTTP/2 Server Push Loading... Last November, we rolled out HTTP/2 support for all our customers. At the time, HTTP/2 was not in wide use, but more than 88k of the Alexa 2 million websites are now HTTP/2-enabled. Today, more than 70% of sites that use HTTP/2 are served via CloudFlare. CC BY 2.0 image by Roger Price Incremental Improvements On SPDY HTTP/2’s main benefit is mul
At first glance, the potential performance improvements of HTTP/1.1 versus HTTP/2 on our demo page may seem a bit hard to believe. So, we put together a technical explanation of how this demo actually works. We’d also like to credit the Gophertiles demo, which served as a basis for our own HTTP/2 demo. Overview A web page can only be served over either HTTP/1.1 or HTTP/2—mixing protocols is not al
If you can’t measure it, you can’t improve it. Measure the real user experience of your website as well as the performance benefits of using Cloudflare. Browser Insights lets you measure the TCP connection time, DNS response time, Time to First Byte (TTFB), page load time, and more from the perspective of your visitors all over the globe. The Speed Page on your dashboard also generates a filmstrip
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