[renovate]

This PR contains the following updates:

Package	Type	Update	Change
divan (source)	dev-dependencies	major	5.0.0 → 6.0.0

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Release Notes

CodSpeedHQ/codspeed-rust (divan)

v6.0.0

Compare Source

CodSpeed for Rust 6.0.0 removes a source of measurement noise from your CPU Simulation benchmarks, so you can spend less time investigating unexpected changes in unrelated results.

Highlights

Your Divan and Criterion benchmarks now run in separate processes. Changes to one benchmark no longer carry allocator state into the benchmarks that follow it, improving consistency as your benchmark suite evolves.

Early results showed lower run-to-run variance, with roughly 70% fewer benchmarks varying by more than 1%.
No benchmark code changes required. Your WallTime results are unaffected.

Breaking Changes

• Some benchmark values may shift when you upgrade
• Each benchmark adds small process startup overhead to the run

Set CODSPEED_PROCESS_ISOLATION=false to revert to the previous behavior.

What's Changed

• fix(criterion): avoid duplicate setup in simulation iter_batched by @​not-matthias in #​198
• feat(divan): run each benchmark in its own process by @​not-matthias in #​194
• feat(codspeed): declare a Symposium plugin by @​adriencaccia in #​200

Full Changelog: CodSpeedHQ/codspeed-rust@v5.0.3...v6.0.0

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[codspeed]

Merging this PR will regress 1 benchmark

2 warnings

⚠️ 24 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

⚠️ Base and head ran on different runner types

Some benchmarks with significant performance changes were compared across different runner types, so the changes might not come from the code. Run base and head on the same runner type, or use CodSpeed Macro Runners for more stable results.

Learn more about Macro Runners

Open the report in CodSpeed to investigate

🎉 Hooray! codspeed-rust just leveled up to 6.0.0!

A heads-up, this is a breaking change and it might affect your current performance baseline a bit. But here's the exciting part - it's packed with new, cool features and promises improved result stability 🥳!
Curious about what's new? Visit our releases page to delve into all the awesome details about this new version.

⚡ 9 improved benchmarks
❌ 1 regressed benchmark
✅ 16 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
❌	cmp_parser	10.8 µs	12.2 µs	-10.98%
⚡	cmd_diff_release_equal[100]	27.5 µs	24.7 µs	+11.03%
⚡	cmd_cmp_gnu_equal[1000]	24.7 µs	23 µs	+7.64%
⚡	cmd_diff_gnu_equal[100]	24.3 µs	22.7 µs	+6.91%
⚡	cmd_diff_release_equal[10000]	25.8 µs	24.4 µs	+5.82%
⚡	cmd_cmp_release_equal[25000]	26 µs	24.6 µs	+5.8%
⚡	cmp_compare_files_different[100]	83.4 µs	79.3 µs	+5.13%
⚡	cmd_cmp_release_equal[1000]	25.7 µs	24.8 µs	+3.82%
⚡	cmd_diff_release_equal[25000]	25.3 µs	24.4 µs	+3.48%
⚡	cmd_cmp_release_equal[100]	26.3 µs	25.5 µs	+3.28%

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 renovate/divan-6.x (567c9a5) with main (0019867)}