Add SSE4.2 to dynamic dispatch
conbench-apache-arrow / Conbench performance report
failed
Nov 27, 2025 in 0s
Found 37 regressions
Thanks for your patience. Conbench analyzed the 4 benchmarking runs that have been run so far on PR commit a4bfe8a.
Benchmarks with performance regressions
There were 37 possible performance regressions, according to the lookback z-score method.
Benchmarks with regressions:
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Pull Request Run on
amd64-c6a-4xlarge-linuxat 2025-11-27 19:32:37ZBM_UnpackUint64(C++) with params=DynamicAligned/47/64, source=cpp-micro, suite=arrow-bpacking-benchmarkIsInInt64SmallSet(C++) with params=64, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkIsInInt64SmallSet(C++) with params=16, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkBM_DeltaBitPackingDecode_Int64_Narrow(C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmarkIndexInInt32SmallSet(C++) with params=64, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkIsInInt16SmallSet(C++) with params=4, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkBM_UnpackUint32(C++) with params=DynamicUnaligned/20/64, source=cpp-micro, suite=arrow-bpacking-benchmarkIsInInt64SmallSet(C++) with params=2, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkBM_DeltaLengthDecodingByteArray(C++) with params=max-string-length:8/batch-size:2048, source=cpp-micro, suite=parquet-encoding-benchmarkBenchmarkTemporalBinary(C++) with params=<DaysBetween, date64_type>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmarkBM_UnpackUint32(C++) with params=Avx2Unaligned/20/64, source=cpp-micro, suite=arrow-bpacking-benchmarkBM_UnpackUint64(C++) with params=Avx2Unaligned/47/64, source=cpp-micro, suite=arrow-bpacking-benchmarkIsInInt64SmallSet(C++) with params=4, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkIsInInt32SmallSet(C++) with params=64, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkIsInInt16SmallSet(C++) with params=2, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkIsInInt16SmallSet(C++) with params=16, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkIsInInt32SmallSet(C++) with params=16, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkBM_DeltaBitPackingDecode_Int64_Narrow(C++) with params=32768, source=cpp-micro, suite=parquet-encoding-benchmarkBM_UnpackUint64(C++) with params=DynamicUnaligned/47/64, source=cpp-micro, suite=arrow-bpacking-benchmarkBM_DeltaDecodingByteArray(C++) with params=max-string-length:64/batch-size:2048/prefixed-percent:90, source=cpp-micro, suite=parquet-encoding-benchmarkIsInInt32SmallSet(C++) with params=4, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkIndexInInt32SmallSet(C++) with params=4, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkIsInInt32SmallSet(C++) with params=2, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkBM_DeltaDecodingByteArray(C++) with params=max-string-length:64/batch-size:2048/prefixed-percent:99, source=cpp-micro, suite=parquet-encoding-benchmarkBM_ReadStructOfListColumn(C++) with params=50, source=cpp-micro, suite=parquet-arrow-reader-writer-benchmarkBM_UnpackUint32(C++) with params=DynamicAligned/20/64, source=cpp-micro, suite=arrow-bpacking-benchmarkArrayRangeEqualsFixedSizeBinary(C++) with params=32768/10, source=cpp-micro, suite=arrow-compare-benchmarkIndexInInt32SmallSet(C++) with params=16, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkBenchmarkTemporalBinary(C++) with params=<DayTimeBetween, date64_type>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmarkIsInInt16SmallSet(C++) with params=64, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmarkIndexInInt32SmallSet(C++) with params=2, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmark
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Pull Request Run on
amd64-m5-4xlarge-linuxat 2025-11-27 19:49:52Z -
Pull Request Run on
test-mac-armat 2025-11-27 19:59:11ZBM_PlainDecodingSpacedBoolean(C++) with params=32768/1, source=cpp-micro, suite=parquet-encoding-benchmarkBM_PlainDecodingBoolean(C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmarkBM_PlainDecodingBoolean(C++) with params=32768, source=cpp-micro, suite=parquet-encoding-benchmarkBM_PlainDecodingSpacedBoolean(C++) with params=32768/100, source=cpp-micro, suite=parquet-encoding-benchmark
All benchmark runs analyzed:
- Pull Request Run on
amd64-c6a-4xlarge-linuxat 2025-11-27 19:32:37Z - Pull Request Run on
arm64-t4g-2xlarge-linuxat 2025-11-27 20:03:24Z - Pull Request Run on
amd64-m5-4xlarge-linuxat 2025-11-27 19:49:52Z - Pull Request Run on
test-mac-armat 2025-11-27 19:59:11Z
Details
This report was generated using the lookback z-score method with a z-score threshold of 30.0.
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