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.

    Tim Sweeney‏ @TimSweeneyEpic 6 Jan 2018
    • Report Tweet
    • Report NetzDG Violation

    The Spectre and Meltdown attacks are as unanticipated as the incompleteness theorem and failure of naive set theory. Though the issue is easy to see now, simply none of the world’s smartest chip designers had anticipated that system integrity could fail in this way.

    7:57 PM - 6 Jan 2018
    • 47 Retweets
    • 208 Likes
    • Alexander Duffy razh ᕼᗩᑎIᖴ ᖇOᔕᕼᗩᑎ Bazuqueiro E.J. Andrei Simionescu 🇭🇰 vaibhav sagar Jeremy Gibbons 이덕희 Vincent
    14 replies 47 retweets 208 likes
      1. New conversation
      2. Bram Stolk‏ @BramStolk 6 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @TimSweeneyEpic

        Don't you think the first CPU engineer to implement "speculative execution" with roll-backs, was thinking: "I hope this works. But I'm not 100% sure?" The concept of partly undoing executed code sounds so hairy, I can't imagine the designers being 100% confident about it.

        1 reply 1 retweet 2 likes
      3. Tim Sweeney‏ @TimSweeneyEpic 6 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @BramStolk

        What makes speculative execution tractable is that there is a known "committed" architecture state, and the property that speculative microarchitecture state is guaranteed to commit observably in-order and only once its dependencies are satisfied.

        2 replies 1 retweet 2 likes
      4. 2 more replies
      1. New conversation
      2. jonas echterhoff‏ @jonasechterhoff 7 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @TimSweeneyEpic

        Indeed, my first response when reading up on how Spectre works was "wow, that's kinda obvious and nobody has [publicly] considered that for 20 years?" - but then, I guess most security issues are "obvious" in retrospect. Hindsight is 20/20.

        5 replies 1 retweet 11 likes
      3. Tim Sweeney‏ @TimSweeneyEpic 7 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @jonasechterhoff

        Yeah, that’s what reminded me of naive set theory. It seemed sound by the very nature of mathematics, but then some hacker builds the set of all sets that don’t contain themselves...

        0 replies 2 retweets 5 likes
      4. End of conversation
      1. New conversation
      2. bmcnett‏ @bmcnett 6 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @TimSweeneyEpic

        hard to believe that the intelligence agencies never discovered this independently, a long time ago.

        1 reply 1 retweet 6 likes
      3. Cameron Hart‏ @bitshifternz 6 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @bmcnett @TimSweeneyEpic

        indeed

        0 replies 0 retweets 2 likes
      4. End of conversation
      1. New conversation
      2. Jonathan Murphy‏ @vercusgames 7 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @TimSweeneyEpic

        This was when they started allowing more and more back doors into computer hardware, outsourcing, cutting corners. There's always a price to pay when you take the wrong path.

        1 reply 1 retweet 1 like
      3. Tonči Jukić‏ @toncijukic 7 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @vercusgames @TimSweeneyEpic

        It has nothing with intentional backdoors. This is such a simple and complex problem at the same time that it hid in plain sight. You were stepping on it without being aware. As someone said already, it's easy to understand it see it as obvious now after we know about it.

        1 reply 1 retweet 3 likes
      4. 5 more replies
      1. Netoworking‏ @mblneto 7 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @TimSweeneyEpic

        Humans are just much better at coming up with ways of breaking out from a cell than building one.

        0 replies 1 retweet 2 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Jason Cross‏Verified account @JasonCross00 6 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @TimSweeneyEpic

        The worst failures are always failures of imagination.

        1 reply 0 retweets 3 likes
      3. Evan Dashevsky‏Verified account @haldash 7 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @JasonCross00 @TimSweeneyEpic

        We don't think these are purposeful backdoors put in place by the NSA?

        0 replies 0 retweets 0 likes
      4. End of conversation

    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