build(deps): add gungraun (was iai-callgrind) instruction-count benches

Wire `gungraun` 0.18 as a dev-dependency and a `benches/` directory
with instruction-count benchmarks for the algorithmic hot paths.

Why gungraun and not criterion: heuropt's hot paths are deterministic
numerical loops where wall-clock noise dominates real differences.
gungraun runs each benchmark under valgrind/callgrind once and reports
exact instruction counts — stable across machines and CI runners,
detects sub-microsecond regressions cleanly.

Benchmarks added:
- pareto::non_dominated_sort  (the inner loop of every Pareto MOEA)
- pareto::crowding_distance   (NSGA-II survival selection)
- metrics::hypervolume_nd     (HSO recursion, used by SMS-EMOA)
- internal::cholesky          (BO's per-step posterior factorization)
- algorithms::nsga2 single generation (end-to-end smoke check)
- algorithms::cma_es single generation (eigendecomposition cost)

Tracked size only — these aren't part of the regular CI matrix because
they need valgrind installed. Run with `cargo bench` locally.

Wired via the standard `[[bench]]` Cargo entries with `harness = false`
so gungraun's main_macro does the dispatch.

This commit is contained in:

swaits

2026-05-05 10:36:29 -06:00

parent 15d3b2752c

commit 0b31b266ef

2 changed files with 179 additions and 0 deletions

									
										Cargo.toml
									
		+7
		
												View File
												
				@@ -23,3 +23,10 @@ rand = "0.9"

				rand_distr = "0.5"

				rayon = { version = "1", optional = true }

				serde = { version = "1", features = ["derive"], optional = true }

				[dev-dependencies]

				gungraun = "0.18"

				[[bench]]

				name = "hot_paths"

				harness = false