Fix nil comparisons to match Shopify Liquid behavior #58

	name: Benchmarks

	on:
	push:
	branches: [ main, master ]
	pull_request:
	branches: [ main, master ]
	workflow_dispatch:

	jobs:
	benchmark:
	name: Performance Benchmarks
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Fetch all history for comparison
	submodules: true # Checkout reference-liquid submodule for benchmark tests

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version: '1.23'
	cache: true

	- name: Run benchmarks
	run: \|
	cd performance
	go test -bench=. -benchmem -benchtime=500ms \| tee benchmark_results.txt

	- name: Store benchmark result
	uses: benchmark-action/github-action-benchmark@v1
	if: github.event_name != 'pull_request' && github.ref == 'refs/heads/main'
	continue-on-error: true # Don't fail if gh-pages branch doesn't exist yet
	with:
	name: Go Benchmark
	tool: 'go'
	output-file-path: performance/benchmark_results.txt
	github-token: ${{ secrets.GITHUB_TOKEN }}
	auto-push: false # Disabled until gh-pages branch is set up
	alert-threshold: '150%'
	comment-on-alert: false
	fail-on-alert: false
	save-data-file: false # Disabled until gh-pages branch is created
	comment-always: false

	- name: Upload benchmark results
	uses: actions/upload-artifact@v4
	with:
	name: benchmark-results
	path: performance/benchmark_results.txt

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