remove internal uses of `_Py_NewRef` #866

	name: benches

	on:
	push:
	branches:
	- "main"
	pull_request:
	# `workflow_dispatch` allows CodSpeed to trigger backtest
	# performance analysis in order to generate initial data.
	workflow_dispatch:

	jobs:
	benchmarks:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	- uses: dtolnay/rust-toolchain@stable
	with:
	components: rust-src

	- uses: actions/cache@v4
	with:
	path: \|
	~/.cargo/registry
	~/.cargo/git
	pyo3-benches/target
	target
	key: cargo-${{ runner.os }}-bench-${{ hashFiles('**/Cargo.toml') }}
	continue-on-error: true

	- name: Install cargo-codspeed
	run: cargo install cargo-codspeed

	- name: Install nox
	run: pip install nox

	- name: Run the benchmarks
	uses: CodSpeedHQ/action@v2
	with:
	run: nox -s codspeed
	token: ${{ secrets.CODSPEED_TOKEN }}

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