AGENTS.md - Benchmarks (benchmarks/)

ASV suite that times dpnp only; README.md has the full setup.

Rules for Changes

NumPy is not timed: executor stays the single value 'dpnp'. Don't edit the leftover numpy branches in setup: ASV versions a benchmark by the source of setup and time_*, so any edit makes its results incomparable with the recorded history.
Keep params static and their values plain strings, numbers or tuples; skip unsupported devices in setup with SkipNotImplemented.
Timed bodies block on the result (self.sync(...) or dpnp.synchronize_array_data); otherwise they time only the submission.
Parameter axes shared by two or more modules live in benchmarks/benchmarks/_utils.py.
A new non-ASV dependency goes in both requirements.txt (what CI installs) and the benchmark extra in pyproject.toml; ASV itself is only in the extra.

From benchmarks/, against an environment that already has dpnp:

asv machine --yes
asv check --python=same
asv run --python=same --launch-method spawn --quick --bench bench_elementwise

Always pass --launch-method spawn: the SYCL runtime is not fork-safe. Don't pip install ".[benchmark]"; it rebuilds dpnp.