add custom target for didc #565

	name: Rust Bench
	on:
	pull_request:
	jobs:
	runBenchMark:
	name: run benchmark
	runs-on: ubuntu-latest
	env:
	RUSTC_VERSION: 1.77.0
	steps:
	- uses: actions/checkout@v4
	- name: Checkout base branch
	uses: actions/checkout@v4
	with:
	ref: ${{ github.base_ref }}
	path: main/
	- name: Install stable toolchain
	uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: ${{ env.RUSTC_VERSION }}
	override: true
	target: wasm32-unknown-unknown
	- uses: actions/setup-python@v4
	with:
	python-version: "3.10"
	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pyyaml
	- name: Cache cargo build
	uses: actions/cache@v4
	with:
	path: \|
	~/.cargo
	target
	rust/bench/target
	key: ${{ runner.os }}-bench-0.1.4-${{ hashFiles('**/Cargo.lock') }}
	- name: Install canbench
	run: cargo install canbench
	- name: Run perf for base branch
	run: \|
	pushd main/rust/bench
	canbench --persist
	popd
	cp main/rust/bench/canbench_results.yml rust/bench/
	- name: Run perf for PR beanch
	run: \|
	pushd rust/bench
	canbench --less-verbose --persist > /tmp/perf.txt
	python diff.py canbench_results.yml ../../main/rust/bench/canbench_results.yml > /tmp/table.md
	{
	cat /tmp/table.md
	echo "<details><summary>Click to see raw report</summary>"
	echo
	echo "\`\`\`"
	cat /tmp/perf.txt
	echo "\`\`\`"
	echo "</details>"
	} > /tmp/message.txt
	- name: Post comment
	uses: thollander/actions-comment-pull-request@v2
	with:
	filePath: /tmp/message.txt
	comment_tag: canbench

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