tustvold opened a new pull request, #2944:
URL: https://github.com/apache/arrow-rs/pull/2944
# 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 str(20, 0.0) 100 [0..100, 100..230, 450..1000]
time: [1.0792 µs 1.0795 µs 1.0799 µs]
change: [-60.193% -60.122% -60.019%] (p = 0.00 <
0.05)
Performance has improved.
Found 6 outliers among 100 measurements (6.00%)
3 (3.00%) high mild
3 (3.00%) high severe
interleave str(20, 0.0) 400 [0..100, 100..230, 450..1000]
time: [3.2179 µs 3.2187 µs 3.2197 µs]
change: [-60.739% -60.622% -60.497%] (p = 0.00 <
0.05)
Performance has improved.
Found 11 outliers among 100 measurements (11.00%)
4 (4.00%) low mild
2 (2.00%) high mild
5 (5.00%) high severe
interleave str(20, 0.0) 1024 [0..100, 100..230, 450..1000]
time: [7.4057 µs 7.4079 µs 7.4101 µs]
change: [-60.606% -60.542% -60.442%] (p = 0.00 <
0.05)
Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
2 (2.00%) high mild
1 (1.00%) high severe
interleave str(20, 0.0) 1024 [0..100, 100..230, 450..1000, 0..1000]
time: [7.4336 µs 7.4369 µs 7.4403 µs]
change: [-58.701% -58.630% -58.525%] (p = 0.00 <
0.05)
Performance has improved.
Found 9 outliers among 100 measurements (9.00%)
7 (7.00%) high mild
2 (2.00%) high severe
interleave str(20, 0.5) 100 [0..100, 100..230, 450..1000]
time: [1.6810 µs 1.6815 µs 1.6821 µs]
change: [-58.572% -58.434% -58.308%] (p = 0.00 <
0.05)
Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
1 (1.00%) low mild
4 (4.00%) high mild
2 (2.00%) high severe
interleave str(20, 0.5) 400 [0..100, 100..230, 450..1000]
time: [5.2158 µs 5.2246 µs 5.2341 µs]
change: [-64.090% -63.972% -63.864%] (p = 0.00 <
0.05)
Performance has improved.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) high severe
interleave str(20, 0.5) 1024 [0..100, 100..230, 450..1000]
time: [16.993 µs 17.013 µs 17.032 µs]
change: [-54.202% -54.077% -53.991%] (p = 0.00 <
0.05)
Performance has improved.
interleave str(20, 0.5) 1024 [0..100, 100..230, 450..1000, 0..1000]
time: [17.424 µs 17.443 µs 17.464 µs]
change: [-52.353% -52.256% -52.128%] (p = 0.00 <
0.05)
Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
3 (3.00%) high mild
1 (1.00%) high severe
```
# What changes are included in this PR?
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sometimes worth providing a summary of the individual changes in this PR.
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Adds a specialized implementation for string arrays
# Are there any user-facing changes?
No
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