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
TimSweeneyEpic's profile
Tim Sweeney
Tim Sweeney
Tim Sweeney
@TimSweeneyEpic

Tweets

Tim Sweeney

@TimSweeneyEpic

Epic Games founder & CEO

epicgames.com
Joined August 2013

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. Tim Sweeney‏ @TimSweeneyEpic Feb 1
      • Report Tweet
      • Report NetzDG Violation

      The ideal performance property we should ask of a high-level programming language and library is that it minimizes runtime and compile-time combinatorial complexity. We can accept constant overheads, but not higher-order overheads. This has many implications.

      6 replies 6 retweets 106 likes
      Show this thread
    2. Tim Sweeney‏ @TimSweeneyEpic Feb 1
      • Report Tweet
      • Report NetzDG Violation

      One is that containers should be designed to minimize asymptotic complexity of operations. If concatenating strings is O(m+n), we’re doing it wrong. This means we can’t expect nice linear arrays in memory, but must pay some sort of dynamic control flow cost for accessing them.

      3 replies 0 retweets 13 likes
      Show this thread
    3. Tim Sweeney‏ @TimSweeneyEpic Feb 1
      • Report Tweet
      • Report NetzDG Violation

      The other is we should never copy a non-constant-sized data structure, but ensure it can be used in all contexts as-is or with the help of a constant sized adapter.

      2 replies 0 retweets 14 likes
      Show this thread
    4. Tim Sweeney‏ @TimSweeneyEpic Feb 1
      • Report Tweet
      • Report NetzDG Violation

      Next, we have to abandon manually synchronized memory concurrency. The combinatorial complexity here isn’t in performance but in programmer reasoning. We must either stay single-threaded or adopt purely functional programming or transactions.

      1 reply 3 retweets 30 likes
      Show this thread
    5. Tim Sweeney‏ @TimSweeneyEpic Feb 1
      • Report Tweet
      • Report NetzDG Violation

      Finally, types should obey the mathematical properties expected of them. This means we must adopt mathematical integers, and if we support smaller integer storage formats, they are still just for storage. The byte 255 plus the byte 1 is not the byte 0, it’s the integer 256.

      2 replies 2 retweets 17 likes
      Show this thread
    6. Tim Sweeney‏ @TimSweeneyEpic Feb 1
      • Report Tweet
      • Report NetzDG Violation

      If we support floating point, then the float 1.0f can’t be equal to integer 1, because there exist functions f where f(1.0f) is unequal to f(1), and a==b implies that for all f, f(a)==f(b). We must either say 1 is not equal to 1.0f, or that we aren’t allowed to compare them.

      7 replies 0 retweets 34 likes
      Show this thread
      Tim Sweeney‏ @TimSweeneyEpic Feb 1
      • Report Tweet
      • Report NetzDG Violation

      Programming languages should be built on principles first and foremost, and avoid conveniences that violate principles. So much of what’s wrong today is the result of design by “wouldn’t it be nice if” without an earnest enumeration of guiding principles.

      7:00 PM - 1 Feb 2020
      • 12 Retweets
      • 73 Likes
      • Matthew G John S. Dvorak Matthew "Actual Unicorn" Simo Jane Flowers Daniel Oakley Antonio V Cavalcante Eryk Dobson Daniel Hooper John Koszarek
      5 replies 12 retweets 73 likes
        1. New conversation
        2. Jon Bonazza‏ @nerdwithdice Feb 1
          • Report Tweet
          • Report NetzDG Violation
          Replying to @TimSweeneyEpic

          What do you think about #golang ? It seems to meet most (though not all) of the ideas you've expressed in these threads. Was going to wait in ask when you come by the Seattle Epic offices in Feb, but thought I might as well as here. :)

          1 reply 0 retweets 3 likes
        3. Tim Sweeney‏ @TimSweeneyEpic Feb 1
          • Report Tweet
          • Report NetzDG Violation
          Replying to @nerdwithdice

          A language needs to thoroughly tackle generics in order to stay on the mainline of the programming language tech tree, which undoubtedly grows to support constructive logic proofs-as-programs.

          0 replies 0 retweets 7 likes
        4. End of conversation
        1. New conversation
        2. Tom Forsyth‏ @tom_forsyth Feb 1
          • Report Tweet
          • Report NetzDG Violation
          Replying to @TimSweeneyEpic

          Designing good languages is pretty easy. You just ask "what does JavaScript do" and then make that a fatal compile error.

          3 replies 3 retweets 54 likes
        3. ninepoints‏ @m_ninepoints Feb 1
          • Report Tweet
          • Report NetzDG Violation
          Replying to @tom_forsyth @TimSweeneyEpic

          Y'know, I used to think this but if you overlook the first 16 years of JS and just consider the last 7 or so, they've made some pretty big strides. Async/await/generator functions are a pretty elegant model, and with arrow functions, they sort of fixed the self/this fiasco

          2 replies 0 retweets 3 likes
        4. 1 more reply
        1. Jonathan Blow‏ @Jonathan_Blow Feb 1
          • Report Tweet
          • Report NetzDG Violation
          Replying to @TimSweeneyEpic

          I am not on board with most of this stuff, but if you follow these threads in a serious way I'll be interested to see where it goes.

          0 replies 0 retweets 11 likes
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo
        1. New conversation
        2. Wouter‏ @wvo Feb 2
          • Report Tweet
          • Report NetzDG Violation
          Replying to @TimSweeneyEpic

          These principles have a cost. If your principles and current CPUs disagree on how things are computed and what is fast, you are looking at unpredictable performance cliffs, unpredictable complex compiler optimizations, or likely both. Are those worth it, and for who?

          1 reply 1 retweet 2 likes
        3. Wouter‏ @wvo Feb 2
          • Report Tweet
          • Report NetzDG Violation
          Replying to @wvo @TimSweeneyEpic

          "performance" is not just for people writing game engines, a language that makes 10x faster "easy" also buys you simplicity and elegance in code where I have to spend less time second guessing the implementation, playing whack-a-mole with these "cliffs".

          0 replies 0 retweets 1 like
        4. End of conversation
        1. Jan‏ @PlayaJan Feb 2
          • Report Tweet
          • Report NetzDG Violation
          Replying to @TimSweeneyEpic

          What do you think of PureBasic? http://www.purebasic.com 

          0 replies 0 retweets 1 like
          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