mapleFU commented on PR #39403:
URL: https://github.com/apache/arrow/pull/39403#issuecomment-1932308581
```c++
void DefLevelsToBitmap(const int16_t* def_levels, int64_t num_def_levels,
LevelInfo level_info, ValidityBitmapInputOutput*
output) {
// It is simpler to rely on rep_level here until PARQUET-1899 is done and
the code
// is deleted in a follow-up release.
if (level_info.rep_level > 0) {
#if defined(ARROW_HAVE_RUNTIME_BMI2)
if (CpuInfo::GetInstance()->HasEfficientBmi2()) {
return DefLevelsToBitmapBmi2WithRepeatedParent(def_levels,
num_def_levels,
level_info, output);
}
#endif
standard::DefLevelsToBitmapSimd</*has_repeated_parent=*/true>(
def_levels, num_def_levels, level_info, output);
} else {
standard::DefLevelsToBitmapSimd</*has_repeated_parent=*/false>(
def_levels, num_def_levels, level_info, output);
}
}
```
@pitrou is bmi2 enabled in `DefinitionLevelsToBitmapRepeated` benchmark?
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