Skip to content
By using Twitter’s services you agree to our Cookies Use. We and our partners operate globally and use cookies, including for analytics, personalisation, and ads.

This is the legacy version of twitter.com. We will be shutting it down on June 1, 2020. Please switch to a supported browser, or disable the extension which masks your browser. You can see a list of supported browsers in our Help Center.

  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

Tweets

Patrick Walton

@pcwalton

Research engineer at Mozilla

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

Tweets

  • © 2020 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Imprint
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. Thomas H. Ptacek‏ @tqbf 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @pcwalton @KirinDave

      Yeah, I read that like everyone else. I understand what a generational collector is. The problem with your argument, I think, is that there are much more popular languages with similarly dumb GCs that Go outperforms.

      1 reply 0 retweets 1 like
    2. Thomas H. Ptacek‏ @tqbf 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @tqbf @pcwalton @KirinDave

      You want to be arguing that Go’s GC is SUBOPTIMAL. But instead, you’re arguing that it’s INAPPROPRIATE. You’re going to lose that argument.

      1 reply 0 retweets 2 likes
    3. Patrick Walton‏ @pcwalton 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @tqbf @KirinDave

      But I’m only arguing that the Go GC design is suboptimal. I’m not trying to argue that it doesn’t work at all. My problem is that people don’t realize that it’s suboptimal. We’re forgetting all the lessons we learned in the ‘90s, which is tragic.

      2 replies 0 retweets 6 likes
    4. David Crawshaw‏ @davidcrawshaw 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @pcwalton @tqbf @KirinDave

      Your criticism of Go would be more interesting if you chatted with the team. rlh@ proposed a generational collector years ago, and has been trialling it in parallel with ROC for the past year. E.g. https://go-review.googlesource.com/c/go/+/105367 

      1 reply 0 retweets 2 likes
    5. David Crawshaw‏ @davidcrawshaw 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @davidcrawshaw @pcwalton and

      He and Austin have been distracted by a fact that has changed since the 90s: server tail latency matters so much Go customers are willing to throw away huge amounts of CPU to remove it. Hence generational is low priority, and the focus has been low pause. It's customer driven.

      3 replies 1 retweet 6 likes
    6. Patrick Walton‏ @pcwalton 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @davidcrawshaw @tqbf @KirinDave

      If you had a properly architected generational GC, you’d sacrifice a *tiny* amount of latency for huge throughput gains. Bump allocation in the nursery is such a huge benefit it’s virtually never worth throwing it away. That’s why Azul’s ultra-low-latency GC is generational.

      1 reply 0 retweets 0 likes
    7. David Crawshaw‏ @davidcrawshaw 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @pcwalton @tqbf @KirinDave

      Azul and Baker (who sat a few desks away from me in NYC) have discussed these issues with them. I'm sure you've heard the escape analysis argument, but that's why bump allocation is lower priority. It's still on the list, gri@ complained about it in a dart comparison years ago.

      1 reply 0 retweets 0 likes
    8. Patrick Walton‏ @pcwalton 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @davidcrawshaw @tqbf @KirinDave

      Then it sounds like we agree that concurrent generational GC is the way to go!

      1 reply 0 retweets 0 likes
    9. David Crawshaw‏ @davidcrawshaw 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @pcwalton @tqbf @KirinDave

      As long as all your global and per-thread pauses are sub-100-microseconds, sure. I don't personally have much need for generational though I agree there are some programs that need it. I certainly don't think Go is broken for putting it off.

      2 replies 0 retweets 1 like
    10. David Crawshaw‏ @davidcrawshaw 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @davidcrawshaw @pcwalton and

      I have other GC concerns, that I would happily sacrifice generational and other features for. How will GC scale in a 1000 core programs with a relatively-flat 100 TB heap? We may reach a point where even a nominal STW is too expensive. Do we have to segment heaps at some point?

      3 replies 0 retweets 1 like
      Patrick Walton‏ @pcwalton 9 May 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @davidcrawshaw @tqbf @KirinDave

      I agree that’s interesting, but how many customers have that situation? :) (I don’t see how that’s incompatible with generational GC anyway. TLABs are pretty awesome.)

      2:33 PM - 9 May 2018 from Civic Center, San Francisco
      1 reply 0 retweets 0 likes
        1. New conversation
        2. David Crawshaw‏ @davidcrawshaw 9 May 2018
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton @tqbf @KirinDave

          Right! I'm not considering the Go team work on that, they can't keep up with today's customer demands. I was letting myself be theoretical for a moment. It concerns me because I think we are heading that way, and it may require fundamental changes to the way I program.

          1 reply 0 retweets 0 likes
        3. David Crawshaw‏ @davidcrawshaw 9 May 2018
          • Report Tweet
          • Report NetzDG Violation
          Replying to @davidcrawshaw @pcwalton and

          I also agree that solutions may be compatible with generational GC. But it is a problem that may require putting a lot of fundamental assumptions up for consideration. If something made me start writing non-GCed code again on computers with separate DRAM chips, that would be why.

          1 reply 0 retweets 0 likes
        4. 1 more reply

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2020 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Imprint
        • Cookies
        • Ads info