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Preallocate buffers for FixedSizeBinary array creation #3793

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merged 4 commits into from
Mar 3, 2023

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maxburke
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@maxburke maxburke commented Mar 2, 2023

Closes issue #3792

@github-actions github-actions bot added the arrow Changes to the arrow crate label Mar 2, 2023
let mut buffer = MutableBuffer::from_len_zeroed(0);

let iter_size_hint = iter.size_hint().0;
let mut null_buf = MutableBuffer::from_len_zeroed((iter_size_hint + 7) / 8);
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I would perhaps expect to see MutableBuffer::new here - https://docs.rs/arrow-buffer/latest/arrow_buffer/struct.MutableBuffer.html#method.new?

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Done

let mut null_buf = MutableBuffer::from_len_zeroed(0);

let iter_size_hint = iter.size_hint().0;
let mut null_buf = MutableBuffer::from_len_zeroed((iter_size_hint + 7) / 8);
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Can we use bit_util::ceil here instead

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Done

@tustvold tustvold merged commit b9fcd7f into apache:master Mar 3, 2023
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ursabot commented Mar 3, 2023

Benchmark runs are scheduled for baseline = f8abb04 and contender = b9fcd7f. b9fcd7f is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

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3 participants