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pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

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Patrick Walton

@pcwalton

Research engineer at Mozilla

San Francisco, CA
pcwalton.github.io
Joined November 2009

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    1. Tamas Blummer‏ @TamasBlummer 11 Dec 2018
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      Replying to @dakami @rustlang

      Rust compiler will never be as fast as C, but it costs more time of the programmer trying to avoid or debug problems C allows to exist and Rust does not.

      1 reply 0 retweets 5 likes
    2. Dan Kaminsky‏Verified account @dakami 11 Dec 2018
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      Replying to @TamasBlummer @rustlang

      Taking 2x-5x is fine. Taking 20x-100x is not fine. I have to remove anything containing Rust from some of my projects now.

      1 reply 0 retweets 1 like
    3. Dan Kaminsky‏Verified account @dakami 11 Dec 2018
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      Replying to @dakami @TamasBlummer @rustlang

      A compile that would take 15 minutes now taking 20 hours is not ok.

      2 replies 0 retweets 4 likes
    4. Tamas Blummer‏ @TamasBlummer 11 Dec 2018
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      Replying to @dakami @rustlang

      That's gross I agree. It must be some exceptional size of code base and some very disruptive change to it.

      1 reply 0 retweets 1 like
    5. Pierre Chapuis‏ @pchapuis 12 Dec 2018
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      Replying to @TamasBlummer @dakami @rustlang

      You don't need an exceptional size of code base to have this issue, just your regular 6-figure LOC industrial project. Exceptionally large code bases have compile time issues in C++ (that's a major reason why Google created Go).

      2 replies 0 retweets 0 likes
    6. Dan Kaminsky‏Verified account @dakami 12 Dec 2018
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      Replying to @pchapuis @TamasBlummer @rustlang

      Where Chromium is building in 30-45 minutes, Firefox is taking 12-24 hours. Stuck in Rust. I can’t work with that.

      4 replies 0 retweets 1 like
    7. Pierre Chapuis‏ @pchapuis 12 Dec 2018
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      Replying to @dakami @TamasBlummer @rustlang

      I don't think such build times are expected for Firefox on any platform, sounds like a bug... Their build times in CI are < 1h afaik.

      1 reply 0 retweets 5 likes
    8. Dan Kaminsky‏Verified account @dakami 12 Dec 2018
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      Replying to @pchapuis @TamasBlummer @rustlang

      On gentoo, if I emerge Firefox, it’s ready tomorrow. I will loudly and happily proclaim my error if this is a gentoo bug and not a rust bug. I will sit down and write some rust code if that’s the case.

      5 replies 1 retweet 3 likes
    9. Rust Language‏ @rustlang 12 Dec 2018
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      Replying to @dakami @pchapuis @TamasBlummer

      For what it’s worth, we do know compile times are a pain point, and are always working on improving them. That does sound quite excessive though. I don’t follow Firefox build times, but if that was the norm, I’d expect to have heard about it.

      2 replies 0 retweets 10 likes
    10. Dan Kaminsky‏Verified account @dakami 12 Dec 2018
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      Replying to @rustlang @pchapuis @TamasBlummer

      Well, for what it’s worth, I expect you would have heard of it too. I’m making debug builds so perhaps *that* codepath is the problem. I should find out. Usually people just say “suck it up” rather than press for more science. I’m always game for more science!

      4 replies 0 retweets 5 likes
      Patrick Walton‏ @pcwalton 12 Dec 2018
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      Replying to @dakami @rustlang and

      I bet $10 Gentoo is building the Rust compiler in debug mode with whatever settings you’re using. Chromium compiles pretty slow too if you build LLVM in Debug+Asserts mode.

      3:09 PM - 12 Dec 2018
      • 3 Likes
      • nightmared mr. waddlesplash Jed Davis 🏳️‍🌈
      1 reply 0 retweets 3 likes
        1. Dan Kaminsky‏Verified account @dakami 12 Dec 2018
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          Replying to @pcwalton @rustlang and

          Not that slow but this would be my bug not theirs :)

          0 replies 0 retweets 0 likes
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