add disclaimer for https://github.com/phuslu/lru/issues/14 #611

	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: '1.22'
	check-latest: true
	- uses: actions/checkout@v4
	- name: go mod tidy
	run: \|
	mkdir bench
	cd bench
	awk '{if($0 ~ "// env writeratio="){a=1;b=1};if($0 ~ "```" && b=1){b=0};if (a&&b) {print}}' ../README.md \| tee bench_test.go
	go mod init bench
	go mod tidy
	go mod edit -replace github.com/phuslu/lru=../
	cat go.mod
	- name: Throughput benchmarks
	working-directory: ./bench
	run: \|
	env writeratio=0.1 zipfian=false go test -v -cpu=8 -run=none -bench=. -benchtime=5s -benchmem bench_test.go
	env writeratio=0.01 zipfian=true go test -v -cpu=8 -run=none -bench=. -benchtime=5s -benchmem bench_test.go

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