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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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    Mathias Bynens‏Verified account @mathias 10 Sep 2019
    • Report Tweet
    • Report NetzDG Violation

    Mathias Bynens Retweeted Axel Rauschmayer

    Listen to Axel, y’all. Don’t focus on manual micro-optimizations, instead write readable code and let JS engines do their job!https://twitter.com/rauschma/status/1171459042474020864 …

    Mathias Bynens added,

    Axel Rauschmayer @rauschma
    1/ Thoughts: – Which construct performs best often varies between engines and even per engine, over time. – More often than not, there is no need to worry about micro-optimizations: Use what’s most elegant and use common patterns (=increases chance of engines optimizing). https://twitter.com/kleinfreund/status/1171456522397765634 …
    Show this thread
    10:59 PM - 10 Sep 2019
    • 46 Retweets
    • 233 Likes
    • Kesk Noren まっちー Ironeko Piotr Łukomiak Douglas Barbosa de Lima David Bernegger ✨ Matthew Bauer Hashem Qolami MinekoDaae
    3 replies 46 retweets 233 likes
      1. New conversation
      2. Thomas Steiner‏ @tomayac 11 Sep 2019
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        Replying to @mathias

        Thomas Steiner Retweeted Mathias Bynens

        Curious. Would you call https://twitter.com/mathias/status/1143551692732030979 … a macro optimization?

        Thomas Steiner added,

        Mathias BynensVerified account @mathias
        🚀 Perf tip: if your web app ships large JSON-like configuration as JavaScript object literals, consider using JSON.parse instead. It’s much faster, especially for cold loads! https://v8.dev/blog/cost-of-javascript-2019#json … pic.twitter.com/p0WICUm7zx
        1 reply 0 retweets 4 likes
      3. Mathias Bynens‏Verified account @mathias 11 Sep 2019
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        Replying to @tomayac

        It’s another example of an optimization I wouldn’t expect anyone to apply by hand. It’s one of those rare cases though where it makes sense for JS build tools to apply a transform (because this is not some implementation-specific detail, but rather applies everywhere).

        0 replies 0 retweets 2 likes
      4. End of conversation
      1. New conversation
      2. Filip Haglund‏ @kaptenadhoc 10 Sep 2019
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        Replying to @mathias

        While this is certainly true, it's a hedge that comes up pretty much EVERY time someone asks a performance related question.

        1 reply 0 retweets 0 likes
      3. Filip Haglund‏ @kaptenadhoc 10 Sep 2019
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        Replying to @kaptenadhoc @mathias

        I mean yes, absolutely we should be teaching the best practices of worrying about readability first and performance when it matters, but sometimes a curious mind just wants to know about the performance.

        1 reply 0 retweets 1 like
      4. 1 more reply
      1. Vihan Bhargava‏ @vihanbh 11 Sep 2019
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        Replying to @mathias

        Going to be honest they have their limitations. I have some code which scans recursively 20-depth objects which huge arrays. Switching to faster for loop mechanism increased speed by about 20ms median across program. Small but it can add up

        0 replies 0 retweets 0 likes
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