Rules
CLS Optimization Hints
Checks for Cumulative Layout Shift prevention
DOM Size
Detects excessive DOM complexity that impacts performance
Font Loading
Checks for font loading best practices
INP Optimization Hints
Checks for Interaction to Next Paint optimization
Lazy Loading Above Fold
Detects lazy loading on likely above-fold images
LCP Optimization Hints
Checks for Largest Contentful Paint optimization opportunities
Preconnect Hints
Checks for preconnect hints to critical third-party origins
Render-Blocking Resources
Checks for render-blocking CSS and JavaScript
Time to First Byte
Measures server response time (TTFB)
Disable All Performance Rules
squirrel.toml