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. Patrick Walton‏ @pcwalton 3 Sep 2019
      • Report Tweet
      • Report NetzDG Violation

      Hot take: Exceptions are a fine error-handling mechanism.

      17 replies 11 retweets 141 likes
    2. whitequark‏ @whitequark 3 Sep 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @pcwalton

      I don't think an error-handling mechanism can be said to be "fine" or not without consideration of a specific implementation and domain. For example, I'm using zero-cost EH in a hard real-time system and it turns out people actually want the exceptional path to be fast and…

      1 reply 0 retweets 13 likes
    3. whitequark‏ @whitequark 3 Sep 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @whitequark @pcwalton

      not merely predictable, which throws quite a wrench in the works. (My alternatives at the time included "SjLj" and "CPS" and did not include "no EH" so I think it was the right choice at the moment, but it's still pretty painful.)

      1 reply 0 retweets 6 likes
    4. Patrick Walton‏ @pcwalton 3 Sep 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @whitequark

      Oh, I’m not really considering implementation details right now, just abstractly in terms of PL design.

      2 replies 0 retweets 2 likes
      Patrick Walton‏ @pcwalton 3 Sep 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @pcwalton @whitequark

      BTW, the “zero-cost exceptions” model is not universally loved among PL implementers. In fact, it’s pretty much a C++ism. JVMs in particular have traditionally never had zero-cost exceptions.

      2:48 PM - 3 Sep 2019
      • 7 Likes
      • Hong Minhee · 洪 民憙 Kaiwalya Joshi Yaah 🍑🦀☕ Gurwinder S. Michael 👻🎃 Status Quo 🎃👻 eddyb, thriving in isolation,
      2 replies 0 retweets 7 likes
        1. New conversation
        2. Patrick Walton‏ @pcwalton 3 Sep 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton @whitequark

          This famously got GCJ into trouble, because Eclipse would take something like a minute to start up, as its startup path threw thousands of exceptions during normal execution. GCJ had to switch to some other method.

          1 reply 0 retweets 26 likes
        3. gankra's gay‏ @Gankra_ 3 Sep 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton @whitequark

          this is one of my fav folklore facts, would love to know if you have a good reference for it that i can use

          1 reply 0 retweets 3 likes
        4. 4 more replies
        1. whitequark‏ @whitequark 3 Sep 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton

          I know. I chose it because in the circumstances, I could only use LLVM as a backend, it was a much better option than SjLj, and CPS-transforming everything would mean losing most debug information.

          0 replies 0 retweets 0 likes
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo

      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