[not-matthias]

Fixes COD-4155.

setupCore called callgrindAddObjSkip(process.execPath), which made callgrind skip the whole node binary. Node runtime cost was then missing from simulation profiles. Remove the call so the node executable is instrumented.

Companion runner change: CodSpeedHQ/codspeed#617

[codspeed]

Merging this PR will degrade performance by 14.17%

4 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

See affected benchmarks

⚠️ 14 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

See affected benchmarks

⚠️ 8 benchmarks with a significant change ran on different hardware

Their base and head results were measured on machines with a different CPU, core count or memory, so the changes might not come from the code. Run base and head on the same runner type.

Learn more about Macro Runners

See affected benchmarks

⚠️ 14 benchmarks with a significant change ran in a different software environment

Their base and head results were measured with a different OS or toolchain, such as compiler, runtime or library versions, so the changes might come from this difference rather than from the code. Open an affected benchmark to see what changed.

See affected benchmarks

ℹ️ 16 benchmarks have no flamegraph

The flamegraph wasn't generated: most of the time was spent in runtime internals, which would leave nothing useful to analyze.

See affected benchmarks

⚡ 5 improved benchmarks
❌ 9 regressed benchmarks
✅ 256 untouched benchmarks
⏩ 56 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	CPU Simulation	recursive fibo 10	333.8 µs	689.7 µs	-51.6%
❌	CPU Simulation	wait 500ms	29.8 ms	54.2 ms	-45.09%
❌	CPU Simulation	wait 1sec	60 ms	98.8 ms	-39.29%
❌	CPU Simulation	test_recursive_fibo_10	334.9 µs	510.5 µs	-34.39%
❌	Memory	wait 1sec	22.7 KB	28.2 KB	-19.53%
❌	Walltime	switch 1	72 ns	84 ns	-14.29%
❌	Walltime	switch 1	72 ns	84 ns	-14.29%
❌	Walltime	fibo darwin	9.1 ms	10.6 ms	-14.12%
❌	Walltime	short body	1.6 µs	1.8 µs	-10.67%
⚡	CPU Simulation	wait 500ms	38.5 ms	29.4 ms	+30.77%
⚡	CPU Simulation	switch 1	652.4 µs	527.9 µs	+23.6%
⚡	CPU Simulation	wait 1sec	72.9 ms	60.4 ms	+20.65%
⚡	Walltime	switch 2	96 ns	84 ns	+14.29%
⚡	Walltime	test_iterative_fibo_10	132 ns	120 ns	+10%

Tip

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

---

_{Comparing cod-4155-remove-obj-skip-for-codspeed-node (ba26caa) with main (4ab6d84)}

Footnotes

1. 56 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. ↩