etseidl commented on PR #6252:
URL: https://github.com/apache/arrow-rs/pull/6252#issuecomment-2290021576
Benchmark results on my 3.6GHz Core i7-12700K workstation:
```
group
master2 opt2
-----
------- ----
arrow_array_reader/BYTE_ARRAY/Decimal128Array/plain encoded, mandatory, no
NULLs 1.01 874.0±10.20µs ? ?/sec 1.00
864.0±8.43µs ? ?/sec
arrow_array_reader/BYTE_ARRAY/Decimal128Array/plain encoded, optional, half
NULLs 1.01 1053.8±9.32µs ? ?/sec 1.00
1040.0±10.77µs ? ?/sec
arrow_array_reader/BYTE_ARRAY/Decimal128Array/plain encoded, optional, no
NULLs 1.01 875.0±6.37µs ? ?/sec 1.00
868.1±9.46µs ? ?/sec
arrow_array_reader/BYTE_STREAM_SPLIT/Decimal128Array/byte_stream_split
encoded, mandatory, no NULLs 1.04 527.3±13.64µs ? ?/sec 1.00
508.8±5.76µs ? ?/sec
arrow_array_reader/BYTE_STREAM_SPLIT/Decimal128Array/byte_stream_split
encoded, optional, half NULLs 1.34 839.5±7.18µs ? ?/sec 1.00
626.5±6.79µs ? ?/sec
arrow_array_reader/BYTE_STREAM_SPLIT/Decimal128Array/byte_stream_split
encoded, optional, no NULLs 1.02 525.6±10.89µs ? ?/sec 1.00
517.7±7.51µs ? ?/sec
arrow_array_reader/BYTE_STREAM_SPLIT/Float16Array/byte_stream_split encoded,
mandatory, no NULLs 1.34 94.7±1.68µs ? ?/sec 1.00
70.6±0.90µs ? ?/sec
arrow_array_reader/BYTE_STREAM_SPLIT/Float16Array/byte_stream_split encoded,
optional, half NULLs 3.13 441.1±4.19µs ? ?/sec 1.00
140.7±1.31µs ? ?/sec
arrow_array_reader/BYTE_STREAM_SPLIT/Float16Array/byte_stream_split encoded,
optional, no NULLs 1.38 101.2±1.08µs ? ?/sec 1.00
73.6±0.55µs ? ?/sec
arrow_array_reader/FIXED_LENGTH_BYTE_ARRAY/Decimal128Array/plain encoded,
mandatory, no NULLs 1.00 226.6±3.52µs ? ?/sec 1.09
247.0±2.83µs ? ?/sec
arrow_array_reader/FIXED_LENGTH_BYTE_ARRAY/Decimal128Array/plain encoded,
optional, half NULLs 1.43 712.9±9.35µs ? ?/sec 1.00
497.5±5.20µs ? ?/sec
arrow_array_reader/FIXED_LENGTH_BYTE_ARRAY/Decimal128Array/plain encoded,
optional, no NULLs 1.00 233.7±2.68µs ? ?/sec 1.07
250.1±2.46µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/binary packed skip, mandatory, no
NULLs 1.43 81.6±1.79µs ? ?/sec 1.00
57.0±1.03µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/binary packed skip, optional, no
NULLs 1.41 82.7±0.59µs ? ?/sec 1.00
58.5±0.57µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/binary packed, mandatory, no NULLs
1.75 131.3±1.29µs ? ?/sec 1.00
74.9±0.75µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/binary packed, optional, half NULLs
3.57 447.2±3.73µs ? ?/sec 1.00
125.3±1.12µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/binary packed, optional, no NULLs
1.69 135.0±1.46µs ? ?/sec 1.00
80.1±0.88µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/dictionary encoded, mandatory, no
NULLs 1.74 133.5±1.09µs ? ?/sec 1.00
76.8±0.65µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/dictionary encoded, optional, half
NULLs 3.49 447.2±3.45µs ? ?/sec 1.00
128.1±1.36µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/dictionary encoded, optional, no
NULLs 1.70 136.7±1.21µs ? ?/sec 1.00
80.4±0.74µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/plain encoded, mandatory, no NULLs
2.64 90.9±0.97µs ? ?/sec 1.00
34.5±0.41µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/plain encoded, optional, half NULLs
4.19 424.6±3.82µs ? ?/sec 1.00
101.4±1.01µs ? ?/sec
arrow_array_reader/INT32/Decimal128Array/plain encoded, optional, no NULLs
2.49 94.3±0.98µs ? ?/sec 1.00
37.9±0.40µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/binary packed skip, mandatory, no
NULLs 1.50 83.6±0.75µs ? ?/sec 1.00
55.7±0.36µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/binary packed skip, optional, no
NULLs 1.48 86.0±1.42µs ? ?/sec 1.00
58.2±0.78µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/binary packed, mandatory, no NULLs
1.70 139.7±2.43µs ? ?/sec 1.00
82.2±1.40µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/binary packed, optional, half NULLs
3.39 451.5±4.55µs ? ?/sec 1.00
133.2±0.97µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/binary packed, optional, no NULLs
1.66 143.0±1.28µs ? ?/sec 1.00
86.3±0.75µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/dictionary encoded, mandatory, no
NULLs 1.69 140.8±1.71µs ? ?/sec 1.00
83.4±0.64µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/dictionary encoded, optional, half
NULLs 3.36 451.2±4.20µs ? ?/sec 1.00
134.1±1.03µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/dictionary encoded, optional, no
NULLs 1.57 144.0±1.76µs ? ?/sec 1.00
91.8±1.26µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/plain encoded, mandatory, no NULLs
2.21 108.7±1.10µs ? ?/sec 1.00
49.1±0.95µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/plain encoded, optional, half NULLs
3.96 433.8±4.27µs ? ?/sec 1.00
109.5±0.92µs ? ?/sec
arrow_array_reader/INT64/Decimal128Array/plain encoded, optional, no NULLs
2.05 112.2±1.10µs ? ?/sec 1.00
54.8±0.34µs ? ?/sec
```
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