Avoid a clone when creating StringArray/BinaryArray from ArrayData #9160
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alamb
commented
Jan 13, 2026
| /// | ||
| /// - buffer must contain valid arrow offsets ( [`OffsetBuffer`] ) for the | ||
| /// given length and offset. | ||
| unsafe fn get_offsets_from_buffer<O: ArrowNativeType>( |
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This is a version of get_offsets immediately above here that takes the Buffers rather than ArrayData. Once I have ported all the arrays, I will remove get_offsets
alamb
commented
Jan 13, 2026
| value_data, | ||
| data_type: T::DATA_TYPE, | ||
| nulls: data.nulls().cloned(), | ||
| data_type, |
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This also saves calling Drop on DataType and a clone of Nulls -- probably not measurable but faster 🤷
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Sometimes a lot of Drop can be surprisingly slow
Jefffrey
approved these changes
Jan 14, 2026
Dandandan
approved these changes
Jan 14, 2026
Dandandan
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to Dandandan/arrow-rs
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Jan 15, 2026
…pache#9160) # Which issue does this PR close? - Part of apache#9061 - broken out of apache#9058 # Rationale for this change Let's make arrow-rs the fastest we can and the fewer allocations the better # What changes are included in this PR? Apply pattern from apache#9114 # Are these changes tested? Existing tests # Are there any user-facing changes? No
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Which issue does this PR close?
make_array) #9061ArrayData(speed up reading from Parquet reader) #9058Rationale for this change
Let's make arrow-rs the fastest we can and the fewer allocations the better
What changes are included in this PR?
Apply pattern from #9114
Are these changes tested?
Existing tests
Are there any user-facing changes?
No