java #16

	name: Minimal setup
	on:
	pull_request_target:
	branches:
	- master
	- bench

	jobs:
	benchmark:
	name: Performance regression check
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up JDK 11
	uses: actions/setup-java@v2
	with:
	java-version: '11'
	distribution: 'adopt'
	# Run benchmark with `go test -bench` and stores the output to a file
	- name: Run benchmark
	run: ./gradlew jmh
	# Download previous benchmark result from cache (if exists)
	- name: Download previous benchmark data
	uses: actions/cache@v1
	with:
	path: ./cache
	key: ${{ runner.os }}-benchmark
	# Run `github-action-benchmark` action
	- name: Store benchmark result
	uses: benchmark-action/github-action-benchmark@v1
	with:
	# What benchmark tool the output.txt came from
	tool: 'jmh'
	# Where the output from the benchmark tool is stored
	output-file-path: ./lib/build/results/jmh/results.json
	# Where the previous data file is stored
	external-data-json-path: ./cache/benchmark-data.json
	# Workflow will fail when an alert happens
	fail-on-alert: true
	# GitHub API token to make a commit comment
	github-token: ${{ secrets.GITHUB_TOKEN }}
	# Enable alert commit comment
	comment-on-alert: true
	# Enable Job Summary for PRs
	summary-always: true
	# Mention @rhysd in the commit comment
	alert-comment-cc-users: '@felldo'
	# Upload the updated cache file for the next job by actions/cache

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