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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Casey Muratori‏ @cmuratori Jul 7

      The hits keep on coming. I'm not sure whether to laugh or cry. https://nibblestew.blogspot.com/2021/07/looking-at-performance-of-refterm.html …

      75 replies 6 retweets 253 likes
    2. Tom Cheng‏ @t_cheng_1 Jul 7
      Replying to @cmuratori

      Most of this is bullshit, the high memory consumption looks interesting though, what's the performance like if you scale the glyph cache down until you hit 'normal' terminal levels?

      1 reply 0 retweets 0 likes
    3. Tom Cheng‏ @t_cheng_1 Jul 7
      Replying to @t_cheng_1 @cmuratori

      Also, why not use cstdlib memset/memcpy? seems like you're just doing extra work to kill performance, SIMD in memcpy makes a huge difference

      1 reply 0 retweets 0 likes
    4. The Sandvich Maker‏ @sandvich_maker Jul 7
      Replying to @t_cheng_1 @cmuratori

      As Casey points out in another reply, clang actually does optimize that "naive" memcpy to use SIMD. But anybody could always use the CRT if they want, it's a reference renderer, not a shipping product, after all.

      1 reply 0 retweets 2 likes
    5. Tom Cheng‏ @t_cheng_1 Jul 7
      Replying to @sandvich_maker @cmuratori

      Just a weird choice to do extra work just to hope the compiler optimises back it to the less-work version In my experience, any hand-rolled memcpy is going to shit on an impromptu compiled one, although maybe compilers are good now (?)

      1 reply 0 retweets 0 likes
      Casey Muratori‏ @cmuratori Jul 7
      Replying to @t_cheng_1 @sandvich_maker

      That's not why it's done. It's done because this is a clean compile that has no libraries. That's usually how I do anything made for benchmarking, because I don't want there to be any unforeseen complications from things the CRT might do on startup, etc.

      11:04 AM - 7 Jul 2021
      • 4 Likes
      • Arthur Tombs rm: can’t stat / Tom Cheng
      0 replies 0 retweets 4 likes

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