fix(criterion-compat): fix URI formatting when criterion_group!/criterion_main! are bypassed

[not-matthias]

No description provided.

[Copilot]

Pull request overview

Fixes CodSpeed Criterion-compat benchmark URI construction when users bypass criterion_group! / criterion_main! (e.g., custom main), ensuring URIs don’t include empty segments and that current_file is derived from the callsite when missing.

Changes:

• Build benchmark URIs from non-empty components (file / macro group / group name / function) to avoid malformed :: sequences.
• Derive current_file from #[track_caller] callsite when criterion_group! didn’t set it.
• Add a new bench reproducer for the “custom main” scenario and register it in Cargo.toml.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
crates/criterion_compat/src/compat/group.rs	Makes URI formatting robust to missing file and/or macro group components.
crates/criterion_compat/src/compat/criterion.rs	Adds callsite-based fallback to populate current_file when macros aren’t used.
crates/criterion_compat/benches/repro_custom_main.rs	Adds a reproducer bench for bypassing criterion_group!/criterion_main!.
crates/criterion_compat/Cargo.toml	Registers the new repro_custom_main bench target.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

You can also share your feedback on Copilot code review. Take the survey.

[codspeed-hq]

Merging this PR will degrade performance by 23.81%

⚡ 6 improved benchmarks
❌ 6 regressed benchmarks
✅ 563 untouched benchmarks
🆕 10 new benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	WallTime	slice_into_vec_with_bytes	94 ns	57 ns	+64.91%
❌	WallTime	string_copy_with_bytes_counter	56 ns	58 ns	-3.45%
❌	WallTime	knight_tour[7]	250.8 ms	267.7 ms	-6.3%
❌	WallTime	iterative[10]	16 ns	21 ns	-23.81%
❌	WallTime	iter_batched_ref_large_input	44 ns	48 ns	-8.33%
🆕	WallTime	my_bench	N/A	< 1 ns	N/A
❌	WallTime	iter_batched_per_iteration	44 ns	48 ns	-8.33%
🆕	WallTime	parameterized[42]	N/A	< 1 ns	N/A
⚡	WallTime	bench_array2[10]	29 ns	9 ns	×3.2
❌	WallTime	bench_array2[42]	51 ns	66 ns	-22.73%
⚡	WallTime	fib_10	413 ns	375 ns	+10.13%
🆕	Memory	my_bench	N/A	0 B	N/A
🆕	Memory	parameterized[42]	N/A	0 B	N/A
🆕	Memory	my_bench	N/A	0 B	N/A
🆕	Memory	parameterized[42]	N/A	0 B	N/A
🆕	Simulation	my_bench	N/A	< 1 ns	N/A
🆕	Simulation	parameterized[42]	N/A	< 1 ns	N/A
🆕	Simulation	my_bench	N/A	< 1 ns	N/A
⚡	Simulation	Iterative	161.9 ns	132.8 ns	+21.97%
⚡	Simulation	Iterative[20]	161.9 ns	132.8 ns	+21.97%
...	...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

---

_{Comparing cod-2324-investigate-issues-with-uri-formatting-in-codspeed-criterion (3fddbb2) with main (dccf5f4)}