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mapreduce has poor performance #87

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alanedelman opened this issue Feb 8, 2023 · 3 comments
Closed

mapreduce has poor performance #87

alanedelman opened this issue Feb 8, 2023 · 3 comments
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arrays Things about the array abstraction. performance Gotta go fast.

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@alanedelman
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the good news is with single precision
https://github.com/mitmath/18337/blob/master/lecture1/the_dream.ipynb
works

the bad news, is @time doesn't show an improvement over my cpu even with n=50,000,000
@maleadt
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maleadt commented Feb 8, 2023

The main array abstraction used there is maximum, right? We implement that using mapreduce, which is currently known to perform badly: #46. I haven't had the time to investigate yet.

@alanedelman
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aha, keep me posted

@ViralBShah ViralBShah changed the title metal.jl not fast metal.jl not fast: mapreduce has poor performance Apr 12, 2023
@maleadt maleadt changed the title metal.jl not fast: mapreduce has poor performance mapreduce has poor performance May 22, 2023
@maleadt maleadt added performance Gotta go fast. arrays Things about the array abstraction. labels May 22, 2023
@maleadt
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maleadt commented May 22, 2023

There's been quite some changes to mapreduce already, so track the remainder of the problem in #46.

@maleadt maleadt closed this as completed May 22, 2023
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