Skip to main content

Bundles/performance-core

Performance Core Audit

performance-core · v1.1.0 · paid

Core Web Vitals-focused performance review covering loading, rendering, image optimization, and resource hints.

Loading & Resource Priority

loading-resource-priority · weight 0.3

LCP element identified and optimized for fast delivery
ab-001995
critical
Time to First Byte under 800ms at 75th percentile
ab-001996
critical
Critical rendering path minimized
ab-001997
critical
Render-blocking CSS eliminated or inlined
ab-001998
high
Preload directives added for critical fonts, images, and scripts
ab-001999
high
Preconnect added for third-party origins
ab-002000
info
Resource hints prefetch and prerender optimized for likely next navigations
ab-002001
low

Rendering & Paint

rendering-paint · weight 0.25

Cumulative Layout Shift sources identified and fixed
ab-002002
high
First Input Delay under 100ms and Interaction to Next Paint under 200ms
ab-002003
high
Long tasks over 50ms broken up or eliminated
ab-002004
high
will-change used sparingly and correctly
ab-002005
low

Image & Media Optimization

image-media-optimization · weight 0.25

Image lazy loading implemented for below-fold content
ab-002006
medium
Next-gen image formats WebP and AVIF served to modern browsers
ab-002007
medium
Responsive images with srcset and sizes
ab-002008
medium
Font-display swap configured on all web fonts
ab-002009
medium
Video poster images provided and optimized
ab-002010
low

Script & Style Efficiency

script-style-efficiency · weight 0.2

Non-critical third-party scripts defer-loaded or async
ab-002011
high
CSS containment used on high-complexity components
ab-002012
medium
Web Worker used for CPU-heavy operations
ab-002013
low
Layout thrashing eliminated
ab-002014
low
Service Worker caching strategy defined
ab-002015
low
HTTP/2 or HTTP/3 enabled on server and CDN
ab-002016
low
Brotli or gzip compression enabled on text assets
ab-002017
low
Static assets served from CDN with geographic edge caching
ab-002018
info
Third-party script impact profiled per script
ab-002019
info
Performance budget defined for JS bundle size, CSS, images, LCP, FID, and CLS
ab-002020
info