pitrou commented on PR #35280:
URL: https://github.com/apache/arrow/pull/35280#issuecomment-1550047309
Just for the record, it's a pity that the all-or-mostly-null case is a bit
slower:
```
ArraySortIndicesInt64WideDict/32768/10000 254 us 254 us
2756 bytes_per_second=122.985M/s items_per_second=16.1199M/s
null_percent=0.01 size=32.768k
ArraySortIndicesInt64WideDict/32768/100 272 us 272 us
2615 bytes_per_second=115.005M/s items_per_second=15.0739M/s null_percent=1
size=32.768k
ArraySortIndicesInt64WideDict/32768/10 324 us 324 us
2162 bytes_per_second=96.5235M/s items_per_second=12.6515M/s
null_percent=10 size=32.768k
ArraySortIndicesInt64WideDict/32768/2 386 us 386 us
1811 bytes_per_second=80.9335M/s items_per_second=10.6081M/s
null_percent=50 size=32.768k
ArraySortIndicesInt64WideDict/32768/1 357 us 357 us
1956 bytes_per_second=87.483M/s items_per_second=11.4666M/s
null_percent=100 size=32.768k
ArraySortIndicesInt64WideDict/32768/0 254 us 254 us
2751 bytes_per_second=122.957M/s items_per_second=16.1163M/s null_percent=0
size=32.768k
ArraySortIndicesInt64WideDict/1048576/100 3398 us 3396 us
205 bytes_per_second=294.442M/s items_per_second=38.593M/s null_percent=1
size=1048.58k
ArraySortIndicesInt64WideDict/8388608/100 31369 us 31341 us
22 bytes_per_second=255.253M/s items_per_second=33.4566M/s null_percent=1
size=8.38861M
```
This can be left to another issue or PR, though. Overall the improvement is
very nice, especially for strings.
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