Casey Destroys Optimization Myths | TheStandup
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Top Comments (10)
Casey's patience is legendary.
the only "always do x" i can think of that works for optimization is "always make sure it's slow before trying to optimize it"
Casey: "To be fair, I am the wrong one to explain it" *proceeds to give a university-level lesson about floating point*
I'm amazed Casey manages to keep it together with all the clowning and interruptions at TheStandup
The author of the tweet neglected to mention that they were measuring all of this on a Redstone CPU in Minecraft.
Awlays here for Casey taking a wrecking ball to sacred cows
always here for some more mergecop
If it was "always do X", the compiler would've done it for you
I was recently working on some CPU image processing stuff where the inverse-multiply thing actually *did* matter. But like Casey said, It was only once I verified that I wasn't memory-bound/everything was in L1, AND I was getting a lot of serialization. Even then for my algorithm it was only like a 5% speedup. Other stuff like making my loops play nice with the cache were like 50% speedups.
"Two web devs are bullying low level backend dev for 25 minutes"
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Top Comments (10)
Casey's patience is legendary.
the only "always do x" i can think of that works for optimization is "always make sure it's slow before trying to optimize it"
Casey: "To be fair, I am the wrong one to explain it" *proceeds to give a university-level lesson about floating point*
I'm amazed Casey manages to keep it together with all the clowning and interruptions at TheStandup
The author of the tweet neglected to mention that they were measuring all of this on a Redstone CPU in Minecraft.
Awlays here for Casey taking a wrecking ball to sacred cows
always here for some more mergecop
If it was "always do X", the compiler would've done it for you
I was recently working on some CPU image processing stuff where the inverse-multiply thing actually *did* matter. But like Casey said, It was only once I verified that I wasn't memory-bound/everything was in L1, AND I was getting a lot of serialization. Even then for my algorithm it was only like a 5% speedup. Other stuff like making my loops play nice with the cache were like 50% speedups.
"Two web devs are bullying low level backend dev for 25 minutes"