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mathias's profile
Mathias Bynens
Mathias Bynens
Mathias Bynens
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@mathias

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Mathias BynensVerified account

@mathias

I work on @ChromeDevTools & @v8js at Google and on ECMAScript through TC39. ♥ JavaScript, HTML, CSS, HTTP, performance, security, Bash, Unicode, i18n, macOS.

Munich, Germany
mths.be
Joined January 2007

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    1. V8‏Verified account @v8js 24 Apr 2018
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      🚀 Chrome 66 reduces parse and compilation time for JavaScript code by 20-40% during initial load.   How? V8’s code caching now also kicks in after top-level execution! https://v8project.blogspot.com/2018/04/improved-code-caching.html …pic.twitter.com/NIP3cikmvg

      3 replies 321 retweets 767 likes
    2. Roman Liutikov‏ @roman01la 24 Apr 2018
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      Replying to @v8js

      Why generated code is keyed on the source string and not for example a hash of that string?pic.twitter.com/XGw2mjLY5V

      2 replies 0 retweets 1 like
    3. Roman Liutikov‏ @roman01la 24 Apr 2018
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      Replying to @roman01la @v8js

      Also what's the motivation behind keying serialized code by script URL? I imagine this can result in cache miss for an identical script served from a different URL.pic.twitter.com/Mp87cdKPBq

      2 replies 0 retweets 0 likes
    4. Mathias Bynens‏Verified account @mathias 24 Apr 2018
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      Replying to @roman01la @v8js

      Chrome already caches the source itself keyed on the URL. @v8js just stores the cached code as additional metadata.

      1 reply 0 retweets 0 likes
    5. Roman Liutikov‏ @roman01la 24 Apr 2018
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      Replying to @mathias @v8js

      Is it intentional? I imagine there are a bunch of possible sources for same third party scripts.

      1 reply 0 retweets 0 likes
      Mathias Bynens‏Verified account @mathias 24 Apr 2018
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      Replying to @roman01la @v8js

      Sure, but they could all have different caching headers. That’s why Chrome needs to cache per URL.

      4:25 AM - 24 Apr 2018
      1 reply 0 retweets 0 likes
        1. Leszek Swirski‏ @leszekswirski 28 Apr 2018
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          Replying to @mathias @roman01la @v8js

          Since the code is attached to the network cache as metadata, we can get it "for free" when looking up the script by URL. Keying by contents would mean separate caches and having to read+hash the file after reading from the network cache. Also, lifetimes are not obvious.

          0 replies 0 retweets 0 likes
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