Nightly Benchmarks #89

	name: Nightly Benchmarks

	on:
	schedule:
	- cron: '0 2 * * *' # daily at 02:00 UTC
	workflow_dispatch:

	permissions:
	contents: write

	jobs:
	run-benchmarks:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.11'

	- name: Install deps
	run: \|
	sudo apt-get update
	sudo apt-get install -y cmake
	python -m pip install -U pip numpy matplotlib

	- name: Configure C++ (Release)
	run: \|
	cmake -S . -B build -DBUILD_BENCHMARKS=ON -DBUILD_TESTS=OFF -DCMAKE_BUILD_TYPE=Release

	- name: Build benchmarks
	run: \|
	cmake --build build --config Release -j

	- name: Run harness and save CSV
	run: \|
	python scripts/run_benchmarks.py --build-dir build --csv benchmark_results.csv --plot benchmark_results.png

	- name: Prepare gh-pages data
	run: \|
	mkdir -p gh-pages-data
	TS=$(date -u +"%Y%m%d-%H%M%S")
	cp benchmark_results.csv gh-pages-data/results-$TS.csv
	cp benchmark_results.png gh-pages-data/results-$TS.png

	- name: Push to gh-pages branch
	uses: JamesIves/github-pages-deploy-action@v4
	with:
	branch: gh-pages
	folder: gh-pages-data
	clean: false
	target-folder: data/benchmarks

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