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Perf: Introduce zero copy path when tonic returns an aligned buffer #10273

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Perf: Introduce zero copy path when tonic returns an aligned buffer #10273

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1d44d7f
introduce zero copy path when tonic returns an aligned buffer
Rich-T-kid Jul 2, 2026
1af08d7
clear space
Rich-T-kid Jul 2, 2026
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12 changes: 11 additions & 1 deletion arrow-flight/src/decode.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -336,8 +336,18 @@ impl FlightDataDecoder {
"Unable to convert flight data header to a record batch".to_string(),
)
})?;
let buffer = {
// Arrow spec requires 64-byte buffer alignment for SIMD;
// see https://arrow.apache.org/docs/format/Columnar.html#buffer-alignment-and-padding
// reuse the allocation if already aligned, otherwise copy into a fresh aligned buffer.
if data.data_body.as_ptr() as usize % 64 == 0 {
&Buffer::from(data.data_body.clone())
} else {
&Buffer::from(data.data_body.as_ref())
}
};
let batch = arrow_ipc::reader::RecordBatchDecoder::try_new(
&Buffer::from(data.data_body.as_ref()),
buffer,
record_batch,
Arc::clone(&state.schema),
&state.dictionaries_by_field,
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