feat: add perf v2 support

[not-matthias]

No description provided.

[Copilot]

Pull Request Overview

This PR migrates CodSpeed's Rust integration from a FIFO-based communication system to a new C-based instrument hooks API for performance v2 support. The changes enable better benchmark instrumentation and timing measurement for performance analysis.

• Replaces FIFO communication with instrument hooks FFI bindings
• Adds support for benchmark timestamp collection and marker insertion
• Updates benchmark examples to use the new codspeed_divan_compat API

Reviewed Changes

Copilot reviewed 16 out of 17 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
crates/divan_compat/divan_fork/src/divan.rs	Updates benchmark URI reporting to use instrument hooks instead of FIFO
crates/divan_compat/divan_fork/src/bench/mod.rs	Replaces FIFO guards with instrument hooks and adds timestamp collection
crates/codspeed/src/instrument_hooks/mod.rs	New FFI wrapper for C instrument hooks library with Unix/non-Unix implementations
crates/codspeed/src/instrument_hooks/ffi.rs	FFI bindings generated from C headers
crates/codspeed/build.rs	Build script to compile C library and generate bindings
crates/codspeed/Cargo.toml	Adds build dependencies for bindgen and cc
.gitmodules	Adds instrument-hooks submodule
.github/workflows/ci.yml	Updates CI configuration for new instrumentation mode

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[Copilot]

Pull Request Overview

Copilot reviewed 18 out of 19 changed files in this pull request and generated 1 comment.

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #121 will degrade performances by 23.49%

_{Comparing cod-1374-codspeed-rust-add-perf-v2-support (c9b70bf) with main (4be2e55)}

Summary

⚡ 11 improvements
❌ 10 regressions
✅ 146 untouched
🆕 19 new

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

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	Iterative	132.5 ns	161.7 ns	-18.04%
❌	Iterative[20]	132.5 ns	161.7 ns	-18.04%
❌	Iterative[21]	134.2 ns	163.3 ns	-17.86%
⚡	bench_array1[4]	183.6 ns	154.4 ns	+18.88%
⚡	bench_array2[4]	183.6 ns	154.4 ns	+18.88%
⚡	init_array[4]	183.6 ns	154.4 ns	+18.88%
❌	mut_borrow	895 ns	924.2 ns	-3.16%
🆕	bench_large_input	N/A	1.6 ms	N/A
🆕	bench_large_input_local	N/A	1.5 ms	N/A
🆕	fib_10	N/A	859.7 ns	N/A
🆕	fib_20	N/A	70 µs	N/A
🆕	fib_30	N/A	8.6 ms	N/A
🆕	sleep_100ms	N/A	566.1 ns	N/A
🆕	sleep_100ms_with_custom_sample	N/A	566.1 ns	N/A
🆕	sleep_10ms	N/A	566.1 ns	N/A
🆕	sleep_1ms	N/A	566.1 ns	N/A
🆕	sleep_50ms	N/A	566.1 ns	N/A
🆕	fib_in_thread[30]	N/A	9.7 ms	N/A
🆕	fib_in_thread[31]	N/A	15.8 ms	N/A
🆕	fib_in_thread[32]	N/A	25.5 ms	N/A
...	...	...	...	...

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

[art049]

looks good!

[codspeed-hq]

CodSpeed WallTime Performance Report

Merging #121 will degrade performances by 62.57%

_{Comparing cod-1374-codspeed-rust-add-perf-v2-support (c9b70bf) with main (4be2e55)}

Summary

⚡ 10 improvements
❌ 53 regressions
✅ 91 untouched
🆕 14 new

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

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	build_vec	214 ns	224 ns	-4.46%
❌	Recursive	47.2 µs	52.3 µs	-9.87%
❌	Recursive[20]	47 µs	52.5 µs	-10.48%
❌	Recursive[21]	76.6 µs	85.6 µs	-10.5%
⚡	fibonacci_custom_measurement	411 ns	372 ns	+10.48%
❌	large_setup	14 ns	16 ns	-12.5%
⚡	iter_batched_per_iteration	40 ns	38 ns	+5.26%
⚡	iter_batched_ref_per_iteration	40 ns	38 ns	+5.26%
❌	from_elem[2048]	245 ns	254 ns	-3.54%
❌	from_elem[4096]	321 ns	349 ns	-8.02%
⚡	from_elem_decimal[2048]	259 ns	240 ns	+7.92%
⚡	bench_array1[10]	10 ns	9 ns	+11.11%
⚡	bench_array2[10]	10 ns	9 ns	+11.11%
❌	init_array[1000]	1.8 µs	2 µs	-12.62%
⚡	fibo_10	2 ns	1 ns	×2
🆕	bench_large_input	N/A	50.5 ms	N/A
🆕	bench_large_input_local	N/A	50.4 ms	N/A
🆕	fib_10	N/A	428 ns	N/A
🆕	fib_20	N/A	52.4 µs	N/A
🆕	fib_30	N/A	6.5 ms	N/A
...	...	...	...	...

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