tustvold opened a new pull request, #2898:
URL: https://github.com/apache/arrow-rs/pull/2898
_Draft as builds on #2885_
# Which issue does this PR close?
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Part of #2864
# Rationale for this change
<!--
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the issue then this section is not needed.
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```
interleave i32(0.0) 100 [0..100, 100..230, 450..1000]
time: [651.12 ns 653.57 ns 656.31 ns]
change: [-63.090% -61.957% -60.766%] (p = 0.00 <
0.05)
Performance has improved.
interleave i32(0.0) 400 [0..100, 100..230, 450..1000]
time: [1.4171 µs 1.4235 µs 1.4299 µs]
change: [-78.002% -77.910% -77.815%] (p = 0.00 <
0.05)
Performance has improved.
interleave i32(0.0) 1024 [0..100, 100..230, 450..1000]
time: [3.0353 µs 3.0481 µs 3.0615 µs]
change: [-80.172% -80.078% -79.986%] (p = 0.00 <
0.05)
Performance has improved.
Found 16 outliers among 100 measurements (16.00%)
1 (1.00%) high mild
15 (15.00%) high severe
interleave i32(0.0) 1024 [0..100, 100..230, 450..1000, 0..1000]
time: [3.0152 µs 3.0182 µs 3.0222 µs]
change: [-79.156% -79.115% -79.069%] (p = 0.00 <
0.05)
Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
4 (4.00%) high mild
6 (6.00%) high severe
interleave i32(0.5) 100 [0..100, 100..230, 450..1000]
time: [1.3152 µs 1.3192 µs 1.3238 µs]
change: [-69.214% -69.114% -69.015%] (p = 0.00 <
0.05)
Performance has improved.
Found 20 outliers among 100 measurements (20.00%)
1 (1.00%) low mild
1 (1.00%) high mild
18 (18.00%) high severe
interleave i32(0.5) 400 [0..100, 100..230, 450..1000]
time: [3.6639 µs 3.6761 µs 3.6898 µs]
change: [-76.085% -75.971% -75.851%] (p = 0.00 <
0.05)
Performance has improved.
interleave i32(0.5) 1024 [0..100, 100..230, 450..1000]
time: [9.4650 µs 9.4999 µs 9.5384 µs]
change: [-76.249% -76.161% -76.071%] (p = 0.00 <
0.05)
Performance has improved.
Found 14 outliers among 100 measurements (14.00%)
1 (1.00%) high mild
13 (13.00%) high severe
interleave i32(0.5) 1024 [0..100, 100..230, 450..1000, 0..1000]
time: [9.5063 µs 9.5349 µs 9.5671 µs]
change: [-76.089% -75.990% -75.895%] (p = 0.00 <
0.05)
Performance has improved.
Found 21 outliers among 100 measurements (21.00%)
2 (2.00%) high mild
19 (19.00%) high severe
```
# What changes are included in this PR?
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There is no need to duplicate the description in the issue here but it is
sometimes worth providing a summary of the individual changes in this PR.
-->
Adds a specialized implementation for primitives
# Are there any user-facing changes?
No
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