Performance
12 audit rules in this category. Click any rule to see the full description, examples, and an AI-agent fix snippet.
page_size
medium
Page size is within limits
Checks that total page size is within limits.
html_size
medium
HTML document size is reasonable
Checks that the HTML document size is reasonable.
ttfb
high
Time to First Byte is fast
Checks that Time to First Byte is fast.
compression
medium
Response uses compression
Checks if the response uses gzip or brotli compression.
js_file_count
medium
JavaScript file count is reasonable
Checks that the number of JavaScript files is reasonable.
css_file_count
medium
CSS file count is reasonable
Checks that the number of CSS files is reasonable.
render_blocking
high
No render-blocking resources
Checks for render-blocking resources in the page head.
total_requests
medium
Total requests are optimized
Checks that the total number of HTTP requests is optimized.
cache_headers
low
Cache headers are configured
Checks that cache headers are properly configured.
broken_scripts
high
All script files are reachable
Checks that all script files are reachable.
broken_stylesheets
high
All CSS files are reachable
Checks that all CSS files are reachable.
broken_images
medium
All images are reachable
Checks that all images are reachable.