doc: refine doc to highlight arrow-udf's difference #195

	name: Benchmark
	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	permissions:
	contents: write
	deployments: write

	jobs:
	benchmark:
	name: Run benchmark
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: '3.12'
	- uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: stable
	target: wasm32-wasi
	- name: Build UDF
	run: cargo build --release -p arrow-udf-example --target wasm32-wasi
	- name: Run benchmark
	run: set -o pipefail && cargo bench --bench bench -- --output-format bencher \| tee output.txt

	- name: Store benchmark result
	uses: benchmark-action/github-action-benchmark@v1
	with:
	name: Rust Benchmark
	tool: 'cargo'
	output-file-path: output.txt
	github-token: ${{ secrets.GITHUB_TOKEN }}
	auto-push: ${{ github.event_name != 'pull_request' }}
	# Show alert with commit comment on detecting possible performance regression
	alert-threshold: '200%'
	comment-on-alert: true
	fail-on-alert: true
	alert-comment-cc-users: '@wangrunji0408'

Provide feedback