[vector.bool] Optimize copy / move algorithms#3353
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StephanTLavavej merged 22 commits intomicrosoft:mainfrom Sep 21, 2023
Merged
[vector.bool] Optimize copy / move algorithms#3353StephanTLavavej merged 22 commits intomicrosoft:mainfrom
StephanTLavavej merged 22 commits intomicrosoft:mainfrom
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StephanTLavavej
requested changes
Jan 20, 2023
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benchmarks/src/std/containers/sequences/vector.bool/move/test.cpp
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barcharcraz
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Feb 24, 2023
benchmarks/src/std/containers/sequences/vector.bool/move/test.cpp
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Use `_UnalignedDestBits` for clarity. Define `_VbFirst_ch`, `_VbLast_ch`, `_VbDest_ch` in that order to mirror the originals. Use `auto`.
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benchmarks/src/std/containers/sequences/vector.bool/copy/test.cpp
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benchmarks/src/std/containers/sequences/vector.bool/copy/test.cpp
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StephanTLavavej
approved these changes
Sep 12, 2023
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This has passed a billion iterations ( |
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/azp run |
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Azure Pipelines successfully started running 1 pipeline(s). |
barcharcraz
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Sep 20, 2023
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I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed. |
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Thanks for contributing this major optimization, enduring the almost 2 years it took to review (since the creation of #2461), and finding the time to fix the correctness issues! 👻 🚀 🎉 |
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I reran the perf numbers and described the speedups in the changelog as varying from 1.8x to 3200x (of course this was only on my machine but the perf numbers are approximate anyways). |
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This is a revival of my old PR that optimized the copy / move algorithms
Unfortunately I did not have that much time recently, so here it is finally. The speedup is rather nice and grows well with the size of the array
Results_vec_bool.xlsx