conbench-apache-arrow[bot] commented on PR #46789:
URL: https://github.com/apache/arrow/pull/46789#issuecomment-2967647488

   Thanks for your patience. Conbench analyzed the 4 benchmarking runs that 
have been run so far on PR commit ca35643e5f217f3ad0451bcaec364fc2ddbcfd5b.
   
   There were 72 benchmark results with an error:
   
   - Pull Request Run on `arm64-t4g-2xlarge-linux` at [2025-06-12 
13:10:19Z](https://conbench.ursa.dev/compare/runs/aa62c40c5b184e07af7e606ead73c9fd...faf46eb3dfb94604922ed6f944fa4172/)
     - [`tpch` (R) with engine=arrow, format=parquet, language=R, 
memory_map=False, query_id=TPCH-07, 
scale_factor=1](https://conbench.ursa.dev/benchmark-results/0684ae46c7ca72458000453af26c325c)
     - [`tpch` (R) with engine=arrow, format=native, language=R, 
memory_map=False, query_id=TPCH-09, 
scale_factor=1](https://conbench.ursa.dev/benchmark-results/0684ae5224b6779f800043fbb638a214)
   - and 70 more (see the report linked below)
   
   There were 18 benchmark results indicating a performance regression:
   
   - Pull Request Run on `arm64-t4g-2xlarge-linux` at [2025-06-12 
13:10:19Z](https://conbench.ursa.dev/compare/runs/aa62c40c5b184e07af7e606ead73c9fd...faf46eb3dfb94604922ed6f944fa4172/)
     - [`BM_ByteStreamSplitEncode_Float_Neon` (C++) with params=32768, 
source=cpp-micro, 
suite=parquet-encoding-benchmark](https://conbench.ursa.dev/compare/benchmarks/0684a7a22f0777d7800034bb8d8ee898...0684ad1f810a787b80007c3dc41e3035)
     - [`BM_ByteStreamSplitEncode_Float_Neon` (C++) with params=1024, 
source=cpp-micro, 
suite=parquet-encoding-benchmark](https://conbench.ursa.dev/compare/benchmarks/0684a7a22e897549800066aec3f5ec50...0684ad1f808f780c80001adefe505218)
   - and 16 more (see the report linked below)
   
   The [full Conbench report](https://github.com/apache/arrow/runs/43992507984) 
has more details.


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