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Optimize point clouds #4932

Merged
merged 5 commits into from
Jan 29, 2024
Merged

Optimize point clouds #4932

merged 5 commits into from
Jan 29, 2024

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emilk
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@emilk emilk commented Jan 29, 2024 •
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What

Some optimizations I found while playing around with large point clouds.

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  • I have read and agree to Contributor Guide and the Code of Conduct
  • I've included a screenshot or gif (if applicable)
  • I have tested the web demo (if applicable):
  • The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG

@emilk emilk added 🚀 performance Optimization, memory use, etc include in changelog labels Jan 29, 2024
@Wumpf Wumpf self-requested a review January 29, 2024 10:33
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Wumpf approved these changes Jan 29, 2024
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neat, but how much faster did it get for you?

crates/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs
Comment on lines +123 to +124
// TODO(emilk): optimize the extend function.
// Right now it is 3-4x faster to collect to a vec first, which is crazy.
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oh wow, that's so sad. I wonder what aspect of this method is this and if that's true with all iterators or only some.

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I'm guessing all the added bounds check

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emilk commented Jan 29, 2024

Well, I have 16 cores, so color loading got around 16x faster :)

@emilk emilk merged commit d017565 into main Jan 29, 2024
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@emilk emilk deleted the emilk/optimize-point-clouds branch January 29, 2024 13:17
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@emilk @Wumpf