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perf(scan): announce every chunk's reads when a V2 scan starts - #10847

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perf(scan): announce every chunk's reads when a V2 scan starts

c3d0d12
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CodSpeed / CodSpeed Performance Analysis succeeded Oct 27, 2026

Performance Gate Passed

3 warnings, 1 note

⚠️ Walltime results may be unreliable

Some benchmarks used the Walltime instrument outside CodSpeed Macro Runners, which can make the results inconsistent.

Learn more about Macro Runners

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⚠️ Unable to measure the execution of 2 benchmarks

These benchmarks measured no execution time, so their results are not comparable and count as unchanged. This usually happens when the compiler removes the code under test.

Prevent compiler optimizations

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⚠️ 25 benchmarks are dominated by system calls

System calls cannot be simulated consistently and are left out of the measure. The reported value understates the real cost. Switch to the Walltime instrument to measure them.

Learn more about system calls

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ℹ️ 40 benchmarks have no flamegraph

The flamegraph wasn't generated: the symbols of the profiling trace could not be resolved, because no information about the language frames was collected.

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⚡ 1 improved benchmark
✅ 2438 untouched benchmarks
⏩ 12 skipped benchmarks1

Performance Changes

Mode Benchmark BASE HEAD Efficiency
⚡ Walltime starts_with_avx512[64, VarBin] 62.1 µs 55.4 µs +12.11%

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Curious why performance improved? Comment @codspeedbot explain why performance improved on this PR, or directly use the CodSpeed MCP with your agent.


Comparing ji/segment-io-announce (c3d0d12) with ji/segment-io (054036d)

Open in CodSpeed

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. ↩