add memory usage tests #120

	name: benchmark

	on:
	schedule:
	- cron: '0 0 * * *'
	push:
	branches:
	- master

	jobs:
	benchmark:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/setup-go@v4
	with:
	go-version: '1.21'
	check-latest: true
	- uses: actions/checkout@v4
	- name: go mod tidy
	run: \|
	mkdir bench
	cd bench
	awk '{if($0 ~ "// go test -v"){a=1;b=1};if($0 ~ "```" && b=1){b=0};if (a&&b) {print}}' ../README.md \| tee bench_test.go
	go mod tidy
	go mod edit -replace github.com/phuslu/lru=../
	- name: Tests
	run: \|
	go test -v -bench=. -race -count=1 -coverprofile=coverage.txt
	- name: Benchmark
	working-directory: ./bench
	run: \|
	go test -v -cpu=8 -run=none -bench=. -benchtime=5s -benchmem bench_test.go
	- name: Memory Usage
	working-directory: ./bench
	run: \|
	awk '{if($0 ~ "// memusage.go"){a=1;b=1};if($0 ~ "```" && b=1){b=0};if (a&&b) {print}}' ../README.md \| tee memusage.go
	go run memusage.go phuslu
	go run memusage.go theine
	go run memusage.go cloudflare
	go run memusage.go ristretto
	go run memusage.go otter
	go run memusage.go ecache
	- name: Upload coverage reports to Codecov
	uses: codecov/codecov-action@v3
	with:
	token: ${{ secrets.CODECOV_TOKEN }}

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