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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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    Casey Muratori‏ @cmuratori 29 Aug 2019

    Things that still happen frequently: 1) People incredulously asking me why I don't use programming languages with garbage collection, 2) Teams who use garbage-collected languages presenting slides on the absurd amount of work they had to do to fix their stuttery framerates.pic.twitter.com/dxmgQlM84p

    5:19 PM - 29 Aug 2019
    • 282 Retweets
    • 1,211 Likes
    • Οεσε Παπα 𝓜𝓪𝓻𝓲𝓪 𝓟𝓪𝓻𝓻𝓪 🍑 Travis Chapman Sung Jin Kang Massinissa Mokhtari Ali Alwasiti Joshua Nate Lawrence WEREMSOFT
    41 replies 282 retweets 1,211 likes
      1. New conversation
      2. Tyler Glaiel‏Verified account @TylerGlaiel 29 Aug 2019
        Replying to @cmuratori

        "garbage collection means you don't need to worry about memory or object lifetime! Now here's our custom object pooling system meant to reduce garbage generation and speed up memory allocation by keeping track of object lifetime manually"

        2 replies 10 retweets 164 likes
      3. Alex May‏ @thestarboretum 29 Aug 2019
        Replying to @TylerGlaiel @cmuratori

        I love to have 800 files of macros and templates that transform c++ into a language with safe memory management meaning every new company i work at needs 6 months of me being inefficient while i learn their magical tribal knowledge necessary to use their code base.

        2 replies 0 retweets 47 likes
      4. Show replies
      1. Wes  🇵🇸‏ @weskerfoot 29 Aug 2019
        Replying to @cmuratori

        Just use this http://home.pipeline.com/~hbaker1/LinearLisp.html … :p

        0 replies 0 retweets 1 like
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      2. Jon Bonazza‏ @nerdwithdice 31 Aug 2019

        The Irony here is that Godot's Vector type (the base for LinkedList and Array) performs even more horribly. Two things that could change in Godot to increase perf considerably across the board: 1. Stop using LinkedList! 2. Get rid of the garbage Vector class

        0 replies 0 retweets 0 likes
      3. End of conversation
      1. New conversation
      2.  🐕 🐕 🐕 🐋 🐕 🐕 🐕‏ @flockofdogs 29 Aug 2019
        Replying to @cmuratori

        Ok. Don’t do event subscription? ...that ruins a lot of design patterns I rely on. Is there something I’m missing?

        2 replies 0 retweets 1 like
      3. Bryan W. Wagner‏ @bryanww 29 Aug 2019
        Replying to @flockofdogs @cmuratori

        Dispatchers are fine as long as events aren't heap allocated. In C/C++ pass them up the stack. In C# use 'unsafe' to pass stack-based structs.

        1 reply 0 retweets 4 likes
      4. Show replies
      1. New conversation
      2. Bill Merrill‏ @billassault 29 Aug 2019
        Replying to @cmuratori

        "Event subscription is expensive" is an interesting one. Normally that's your optimal path. Is this saying to stick with shitty polling mechanics and manual lookups because the subscription mechanism is _less_ efficient?

        2 replies 0 retweets 0 likes
      3. Spooky Forest‏Verified account @forte_bass 29 Aug 2019
        Replying to @billassault @cmuratori

        You have to take every optimization with a grain of salt. By event subscription, they mean event keyword (+=). And by expensive they mean "if you are doing it every frame". Don't worry until there's a problem and solving them is easier than any curmudgeon will let you believe.

        2 replies 0 retweets 3 likes
      4. Show replies
      1. New conversation
      2. Bryan W. Wagner‏ @bryanww 29 Aug 2019
        Replying to @cmuratori

        I tried this once in Java with LibGDX. I was able to achieve flat memory allocation. But it was a LOT of work, and I was only able to avoid unwanted allocs b/c of a deep working knowledge of java. This is much more work than manual alloc/dealloc in C.

        1 reply 0 retweets 5 likes
      3. Bryan W. Wagner‏ @bryanww 29 Aug 2019
        Replying to @bryanww @cmuratori

        I still had framerate issues, and the cause was very, very imprecise thread management timing. Not only do you have to account for OS scheduling issues, but those are further wrapped by the VM's thread scheduling issues. Even with busy wait averaging, it still can stall > 15ms.

        1 reply 0 retweets 3 likes
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