Merge branch 'main' of https://github.com/blueokanna/Tzcraft #4

	# Runs the comparison benchmark (tzcraft vs chrono / time / jiff), appends
	# the dependency and `unsafe` footprint, and commits the assembled report to
	# `benchmark.md` in the repository root.
	#
	# The three comparison libraries live only in the `benchmarks/` package
	# (`publish = false`); `tzcraft`'s own dependency graph is unaffected.

	name: Benchmark

	on:
	push:
	branches: [main]
	paths-ignore:
	- benchmark.md
	- benchmarks/Cargo.lock
	workflow_dispatch:

	permissions:
	contents: write

	env:
	CARGO_TERM_COLOR: always

	jobs:
	benchmark:
	name: tzcraft vs chrono / time / jiff
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: dtolnay/rust-toolchain@stable
	- uses: Swatinem/rust-cache@v2
	with:
	workspaces: benchmarks

	- name: Run the comparison harness
	run: cargo run --release --manifest-path benchmarks/Cargo.toml -- benchmark.md "$(date -u +%Y-%m-%dT%H:%M:%SZ)" "$(git rev-parse --short HEAD)" "$(uname -srm)"

	- name: Append dependency and unsafe footprint
	run: bash benchmarks/footprint.sh benchmark.md

	- name: Commit benchmark.md
	run: \|
	git config user.name "github-actions[bot]"
	git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
	git add benchmark.md benchmarks/Cargo.lock
	if git diff --cached --quiet; then
	echo "No benchmark changes; nothing to commit."
	else
	git commit -m "Update benchmark report"
	git push
	fi

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