The 6 Most Damaging Findings (Recap)

Signal % of Sites Failing Impact

Excessive unused CSS (50%+) 67% +1.4s to First Paint

Image payload >1 MB 72% +1-3s to LCP per 100KB

Render-blocking scripts 82% +1.8s to FCP on average

Missing email auth (SPF/DKIM/DMARC) 83% Proposals & invoices land in spam

Inaccessible color contrast 44% Unreadable text for ~15% of users

"Looks good, runs bad" pattern ~60% Post-redesign performance regression

3 Quick Fixes Any Dev Can Do in 30 Minutes

1. Defer Non-Critical JavaScript (30 min, free)

Gtag, analytics, web fonts loading synchronously — they all block first paint.

<!-- Before blocks render --> <script src= "gtag.js" ></script>

<!-- After — defer until parsing completes --> <script src= "gtag.js" defer ></script>

Enter fullscreen mode

Exit fullscreen mode

Verify: DevTools → Network → reload. Look for scripts without async / defer that aren't powering above-the-fold content.…