alamb commented on PR #9122:
URL: https://github.com/apache/arrow-rs/pull/9122#issuecomment-3732518789
It seems like this may be worth a few percent in performance. I have
restarted the benchmarks to see if I can reproduce the numbers
```
arrow_array_reader/UInt32Array/plain encoded, mandatory, no NULLs
1.00 19.9±0.62µs ? ?/sec 1.06
21.1±1.12µs ? ?/sec
arrow_array_reader/UInt32Array/plain encoded, optional, half NULLs
1.00 117.2±0.80µs ? ?/sec 1.02
120.0±1.06µs ? ?/sec
arrow_array_reader/UInt32Array/plain encoded, optional, no NULLs
1.00 25.4±1.08µs ? ?/sec 1.01
25.8±1.02µs ? ?/sec
...
arrow_array_reader/UInt8Array/plain encoded, mandatory, no NULLs
1.00 28.9±0.34µs ? ?/sec 1.04
30.1±0.19µs ? ?/sec
arrow_array_reader/UInt8Array/plain encoded, optional, half NULLs
1.00 127.6±2.70µs ? ?/sec 1.01
129.2±2.33µs ? ?/sec
arrow_array_reader/UInt8Array/plain encoded, optional, no NULLs
1.00 33.6±0.32µs ? ?/sec 1.03
34.5±0.11µs ? ?/sec
```
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