[gatesn]

Allow Vortex extension types to export into arbitrary Arrow extension types (with matching ID + metadata). Unfortunately, arrow metadata is a UTF8 string, not binary, so vortex extension metadata is base64 encoded.

[codspeed]

Merging this PR will regress 2 benchmarks

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚠️ 23 benchmarks spent significant time in system calls

System calls cannot be consistently instrumented, so they are not included in the measure, which understates the real cost. Please switch to the Walltime instrument to accurately measure system calls.

Measurement and system calls

• decode_primitives[i64, (1000, 8)]
• test_scan_filter[int]
• density_sweep_dense_runs[0.001]
• chunked_dict_primitive_into_canonical[f64, (1000, 1000, 10)]
• warm[(16, 64)]
• compress_fsst[(500, 64, 4)]
• test_repeated_scan_scalar_at[int]
• random_i128[0.01]
• bench_compare_sliced_dict_primitive[(3333, 10000)]
• test_scan_filter[int_float]
• …and 13 more

ℹ️ 40 benchmarks have no flamegraph

The flamegraph could not be generated because we failed to resolve the symbols in the profiling trace. This happens when we fail to harvest information about language frames.

• test_scan_filter[int]
• test_repeated_scan_scalar_at[int_str_float]
• test_repeated_scan_scalar_at[int]
• test_repeated_scan_scalar_at[int_float]
• test_scan_to_arrow_array[int]
• test_scan_filter[int_float]
• test_scan_read_all_to_arrow_array[int]
• test_repeated_scan[int]
• test_scan_scalar_at[int_float]
• test_scan_filter_to_arrow_array[int_str_float]
• …and 30 more

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 6 improved benchmarks
❌ 2 regressed benchmarks
✅ 2400 untouched benchmarks
⏩ 12 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌ ⚠️	CPU Simulation	decode_primitives[i64, (1000, 8)]	24 µs	32.1 µs	-25.35%
❌ ⚠️	CPU Simulation	test_scan_filter[int]	3.2 ms	3.6 ms	-10.86%
⚡	Walltime	threshold_neon[8]	2.3 µs	1.3 µs	+70.02%
⚡ ⚠️	CPU Simulation	density_sweep_dense_runs[0.001]	61.4 µs	43.4 µs	+41.63%
⚡	Walltime	threshold_neon[64]	3.6 µs	2.5 µs	+41.6%
⚡	Walltime	filter_neon[8]	1,144 ns	897 ns	+27.54%
⚡	Walltime	filter_neon[64]	2.1 µs	1.7 µs	+20.57%
⚡	Walltime	filter_neon[80]	3 µs	2.6 µs	+15.32%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing ngates/arrow-unknown-extensions (91c46ff) with develop (ca80583)}

Footnotes

1. 12 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩