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
danluu's profile
Dan Luu
Dan Luu
Dan Luu
@danluu

Tweets

Dan Luu

@danluu

https://patreon.com/danluu 

danluu.com
Joined December 2008

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. Dan Luu‏ @danluu 7 Sep 2017
      • Report Tweet
      • Report NetzDG Violation

      What is RISC? https://danluu.com/risc-definition/ … Hint: it's not about the number of instructions.pic.twitter.com/2YLL4tBWkS

      6 replies 35 retweets 136 likes
      Show this thread
      Dan Luu‏ @danluu 29 Jul 2019
      • Report Tweet
      • Report NetzDG Violation

      Periodic reminder that basically every "RISC is obsolete" / "RISC is unscalable" article is based on a faulty assumption. RISC has never been about not having instructions like FJCVTZS.pic.twitter.com/1ozoH5MWgL

      "I wish I could also be excited, but to me, this is just a reminder that RISC architectures are fundamentally unscalable, and inevitably stop being RISC as soon as they need to be fast. People still call ARM a “RISC” architecture despite ARMv8.3-A adding a FJCVTZS instruction, which is “Floating-point Javascript Convert to Signed fixed-point, rounding toward Zero”. Reduced instruction set, my ass."
      2:15 PM - 29 Jul 2019
      • 17 Retweets
      • 57 Likes
      • Jasper Lyons warker Andrew Johnston Irving zumdeibel c.c. cooper David "Wear a Mask" Penfold 🌳 🌲 🌳 Schrödin̨ger's Trölł Eddy E. del Valle
      8 replies 17 retweets 57 likes
        1. New conversation
        2. Dan Luu‏ @danluu 30 Jul 2019
          • Report Tweet
          • Report NetzDG Violation

          To be fair, RISC is probably one of the worst named concepts in computer science. John Mashey spent a decade correcting people on Usenet and couldn't stem the tide of people who naively thought that the concept was defined by the name.

          3 replies 3 retweets 22 likes
          Show this thread
        3. Dan Luu‏ @danluu 30 Jul 2019
          • Report Tweet
          • Report NetzDG Violation

          People say dynamic programming is a ridiculous name, and it is, but at least it's merely meaningless.pic.twitter.com/vqz7qRD74N

          Twitter won't allow long enough alt text, see https://en.wikipedia.org/wiki/Dynamic_programming#History for the screenshotted quote.
          3 replies 26 retweets 96 likes
          Show this thread
        4. End of conversation
        1. New conversation
        2. Heath Borders‏ @heathborders 29 Jul 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @danluu

          (Assembly, CPU noob) What is RISC about?

          2 replies 0 retweets 0 likes
        3. Dan Luu‏ @danluu 30 Jul 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @heathborders

          Dan Luu Retweeted Dan Luu

          See the tweet before the tweet you're replying to :-)https://twitter.com/danluu/status/905827197713342465 …

          Dan Luu added,

          Dan Luu @danluu
          What is RISC? https://danluu.com/risc-definition/ … Hint: it's not about the number of instructions. pic.twitter.com/2YLL4tBWkS
          Show this thread
          1 reply 0 retweets 0 likes
        4. 2 more replies
        1. Fabian Giesen‏ @rygorous 29 Jul 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @danluu

          This one is especially funny because ARMv8 A64 is _way_ closer overall to the classic RISC philosophy than what's been happening in the 32-bit ARM space for a long time.

          0 replies 0 retweets 11 likes
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo
        1. Anarcho réformé patarchiste‏ @ObnoxiousJul 29 Jul 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @danluu

          You never have lived the hype of the acorn archimedes in the 90's and the disappointment for 30 years to feel like RISC was an overpromising product that was underdelivering. Every time it was: RISC is the best, BUT there was %{random} excuse. https://en.wikipedia.org/wiki/Acorn_Archimedes …

          0 replies 0 retweets 1 like
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo
        1. Tomasz Wegrzanowski‏ @t_a_w 29 Jul 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @danluu

          RISC-V already starts with mixed instruction sizes and unaligned access in just its base set.

          0 replies 0 retweets 0 likes
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo
        1. Ian Silvester‏ @Ian_Silvester 29 Jul 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @danluu @halvarflake

          Sorry, so what is the correction of the faulty assumption? Is it that RISC is simply a smaller set of instructions and doesn't put limits on how complex any given instruction can be? Or something else?

          0 replies 0 retweets 0 likes
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo
        1. Igor Skochinsky‏ @IgorSkochinsky 29 Jul 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @danluu

          Another example of “fat RISC” is Power ISA. It has over 2k instructions, many of them with very complicated semantics. VLE too.

          0 replies 0 retweets 0 likes
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo
        1. gim‏ @gim 15 Aug 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @danluu

          Only person who hasn't tried to parse intel opcodes can say arm is NOT RISC.

          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