docs: add performance docs #1102

	---
	name: Tests
	on:
	pull_request:
	branches:
	- main
	paths-ignore:
	- 'docs/**'
	push:
	branches:
	- main
	paths-ignore:
	- 'docs/**'
	permissions:
	contents: read
	jobs:
	tests:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	php-versions: ['8.2', '8.3', '8.4']
	env:
	GOEXPERIMENT: cgocheck2
	GOMAXPROCS: 10
	steps:
	-
	uses: actions/checkout@v4
	-
	uses: actions/setup-go@v5
	with:
	go-version: '1.22'
	cache-dependency-path: \|
	go.sum
	caddy/go.sum
	-
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-versions }}
	ini-file: development
	coverage: none
	tools: none
	env:
	phpts: ts
	debug: true
	-
	name: Set CGO flags
	run: \|
	echo "CGO_CFLAGS=$(php-config --includes)" >> "$GITHUB_ENV"
	-
	name: Build
	run: go build
	-
	name: Build testcli binary
	working-directory: internal/testcli/
	run: go build
	-
	name: Run library tests
	run: go test -race -v ./...
	-
	name: Run Caddy module tests
	working-directory: caddy/
	run: go test -race -v ./...
	-
	name: Build the server
	working-directory: caddy/frankenphp/
	run: go build
	-
	name: Start the server
	working-directory: testdata/
	run: sudo ../caddy/frankenphp/frankenphp start
	-
	name: Run integrations tests
	run: ./reload_test.sh
	-
	name: Lint Go code
	uses: golangci/golangci-lint-action@v6
	if: matrix.php-versions == '8.3'
	with:
	version: latest

Provide feedback