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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. Kent C. Dodds  🧑‍🚀‏ @kentcdodds Jan 18
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      Oh snap. Just found a situation where using a for of loop was BLAZINGLY FASTER than using a filter + reduce. Gotta figure out a good way to explain it, because it was just such a huge difference. Like, I'm talking: ~50ms vs ~2 minutes... Or something like that

      32 replies 75 retweets 716 likes
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    2. Kent C. Dodds  🧑‍🚀‏ @kentcdodds Jan 18
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      Ok, so here's basically what it was (before left, after right). The filesAndHashes is an array of ~66k items that look like this: { filepath: '/some/path', hash: 'some-hash' } alt: https://gist.github.com/kentcdodds/aacbf3ca4859301ed6cfabdca05f1e85 …pic.twitter.com/QkDsUgWS5B

      28 replies 31 retweets 232 likes
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      Mathias Bynens‏Verified account @mathias Jan 18
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      Replying to @kentcdodds

      filesByHash should be a map

      9:57 AM - 18 Jan 2020
      • 11 Likes
      • Willem Garnier Mats Pfeiffer Dragos Strugar (d11r) Ghani Joe Lencioni Evan Plaice Ken André Scar 🦁 Adrian Elton-Browning
      2 replies 0 retweets 11 likes
        1. Willem Garnier‏ @theonlywillem Jan 19
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          Replying to @mathias @kentcdodds

          Is a Map() object faster for insertion/lookup than a plain object when all keys are just strings? Or is this just about semantics / code clarity / protections against things like the key being malicious like "hasOwnProperty"

          0 replies 0 retweets 1 like
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        1. Cédric Marcone‏ @cedricmarcone Jan 20
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          Replying to @mathias @kentcdodds

          Genuine question: care to explain ? Key is a string what are the benefits ?

          0 replies 0 retweets 0 likes
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