Performance
· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
5.24 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.77 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
304 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.007
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.24 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
8.77 s
Page Load Progression
DJS Execution CostAction2297ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202608200101/show_ads_impl_fy2021.js?bust=122880588 | 779ms | 628ms | 126ms | 3rd |
| https://www.pearreview.com/ | 476ms | 12ms | 6ms | 1st |
| Unattributable | 445ms | 11ms | 0ms | 1st |
| https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-1502173011299631 | 302ms | 215ms | 73ms | 3rd |
| https://www.pearreview.com/sites/all/themes/PearReview/js/jquery-G.js | 120ms | 90ms | 14ms | 1st |
| https://ep2.adtrafficquality.google/sodar/sodar2.js | 66ms | 58ms | 4ms | 3rd |
| https://www.pearreview.com/misc/jquery-G.js | 56ms | 50ms | 5ms | 1st |
| https://www.pearreview.com/misc/drupal-G.js | 53ms | 46ms | 2ms | 1st |
DJS BundlesAction11 scripts, 160 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202608200101/show_ads_impl_fy2021.js?bust=122880588 | 162 KB | 110 KB (68%) | ✓ | 3rd |
| https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-1502173011299631 | 56 KB | 27 KB (48%) | ✓ | 3rd |
| https://www.pearreview.com/sites/all/themes/PearReview/js/jquery-G.js | 37 KB | 23 KB (63%) | ✗ | 1st |
| https://www.pearreview.com/misc/jquery-G.js | 17 KB | — | ✓ | 1st |
| https://www.pearreview.com/misc/drupal-G.js | 4 KB | — | ✗ | 1st |
| https://www.pearreview.com/sites/default/files/languages/de_1ad018fc22722f19c63dba9334d35589-G.js | 2 KB | — | ✓ | 1st |
| https://www.pearreview.com/sites/all/themes/PearReview/js/jquery.lightbox-0.5-G.js | 6 KB | — | ✗ | 1st |
| https://www.pearreview.com/sites/all/themes/PearReview/js/jquery.color-G.js | 2 KB | — | ✓ | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496 | 11 KB | — | ✓ | 3rd |
| https://ep2.adtrafficquality.google/sodar/sodar2.js | 8 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BThird-Party Impact55% third-party, 0 ms blockingREVIEW
BImage Optimization11 images, 0 KB saveableREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BJavaScript Blocking1 JS blocking issue(s) detectedREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Page Weight Budget627 KB transferred, 50 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (44 KB)PASS
Web fonts
2
44 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Compression AlgorithmMain response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
AServer Response Intelligence2 server-response signal(s) detectedPASS
APage Weight Inventory50 resources · 627 KB · 160 KB savings availablePASS
~159.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 50 resources | 627.4 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
Network Waterfall50 requests over 3230msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 779ms | 162 KB | 68% | $10/mo | Costly |
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 302ms | 56 KB | 48% | $4/mo | Costly |
ep2.adtrafficquality.google ep2.adtrafficquality.google | Other | 66ms | 8 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- pagead2.googlesyndication.com adds 779ms and costs ~$10/month
- pagead2.googlesyndication.com adds 302ms and costs ~$4/month
50% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
pagead2.googlesyndication.com takes 779ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
68% of pagead2.googlesyndication.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
pagead2.googlesyndication.com takes 302ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev