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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
2
PASS
11
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
74
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.68 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.75 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.68 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.

1.76 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
11 PASS 2 REVIEW 2 FIX
D
Third-Party Impact
Action
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (197.6 KiB of 200.1 KiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Info::
All images are well-optimized
13 images 191 KB
0 oversized -0 KB
13 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
200 KB transferred, 19 requests
PASS
200 KB transferred, 19 requests
Info::
Page weighs 212 KB (200 KB transferred)
Info::
19 HTTP requests
Info::
Estimated 0.04 g CO2 per page load
200 KB / 2.4 MB budget
200 KB transferred
19 requests
0.04 g CO2 per page load
Images 190.6 KiB 95%
JavaScript 4.2 KiB 2%
CSS 2.8 KiB 1%
HTML 2.1 KiB 1%
Other 459 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
361ms total JS execution
PASS
361ms total JS execution
Info::
https://pbase.com/: 187ms CPU time
Info::
Unattributable: 174ms CPU time
Info::
Third-party scripts: 174ms (48% of total)

Main Thread Breakdown

Other 52% Style & Layout 33% Script Evaluation 7% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://pbase.com/187ms8ms1ms1st
Unattributable174ms6ms0ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
2 scripts, 0 KB unused
PASS
2 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ap1.pbase.com/js/common.js4 KB—✓3rd
https://ap1.pbase.com/js/main.js0 KB—✓3rd
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
19 resources · 200 KB · 0 KB savings available
PASS
19 resources · 200 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 200 KB
Warning::
17 third-party resources (99% of weight)
19 resources · 200.1 KiB · 17 third-party Within 1MB page-weight target
Image 95% · 191.1 KiB
JavaScript 2% · 4.2 KiB
CSS 1% · 2.8 KiB
Document 1% · 2.1 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
19 requests over 292ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.7 s LCP 1.8 shttps://pbase.com// https://pbase.com/ — 200 — 2.1 KiB — 39 ms — h2https://ap1.pbase.com/js/common.jsap1.pbase.com/js/common.js https://ap1.pbase.com/js/common.js — 200 — 3.7 KiB — 21 ms — h2https://ap1.pbase.com/js/main.jsap1.pbase.com/js/main.js https://ap1.pbase.com/js/main.js — 200 — 501 B — 29 ms — h2https://ap1.pbase.com/styles/common.cssap1.pbase.com/styles/common.css https://ap1.pbase.com/styles/common.css — 200 — 1.9 KiB — 29 ms — h2https://ap1.pbase.com/styles/main.cssap1.pbase.com/styles/main.css https://ap1.pbase.com/styles/main.css — 200 — 933 B — 18 ms — h2https://ap1.pbase.com/site/search.gifap1.pbase.com/site/search.gif https://ap1.pbase.com/site/search.gif — 200 — 581 B — 23 ms — h2https://ap1.pbase.com/site/pb_logo.gifap1.pbase.com/site/pb_logo.gif https://ap1.pbase.com/site/pb_logo.gif — 200 — 611 B — 16 ms — h2https://ap1.pbase.com/site/tabs/1r.gifap1.pbase.com/site/tabs/1r.gif https://ap1.pbase.com/site/tabs/1r.gif — 200 — 603 B — 6 ms — h2https://ap1.pbase.com/site/tabs/1l.gifap1.pbase.com/site/tabs/1l.gif https://ap1.pbase.com/site/tabs/1l.gif — 200 — 416 B — 7 ms — h2https://ap1.pbase.com/site/rc/light_gray_5_top.pngap1.pbase.com/site/rc/light_gray_5_... https://ap1.pbase.com/site/rc/light_gray_5_top.png — 200 — 3.2 KiB — 8 ms — h2https://ap1.pbase.com/site/rc/light_gray_5_bot.pngap1.pbase.com/site/rc/light_gray_5_... https://ap1.pbase.com/site/rc/light_gray_5_bot.png — 200 — 3.2 KiB — 10 ms — h2https://ap1.pbase.com/site/rc/dark_gray_5_top.pngap1.pbase.com/site/rc/dark_gray_5_t... https://ap1.pbase.com/site/rc/dark_gray_5_top.png — 200 — 3.2 KiB — 10 ms — h2https://ap1.pbase.com/site/rc/dark_gray_5_bot.pngap1.pbase.com/site/rc/dark_gray_5_b... https://ap1.pbase.com/site/rc/dark_gray_5_bot.png — 200 — 3.2 KiB — 11 ms — h2https://a4.pbase.com/g13/61/1159561/2/176172703.c29af3a4.JPEGa4.pbase.com/g13/61/1159561/2/17617... https://a4.pbase.com/g13/61/1159561/2/176172703.c29af3a4.JPEG — 200 — 99.2 KiB — 36 ms — h2https://a4.pbase.com/g1/89/259589/3/112396030.z3bcxwYj.jpga4.pbase.com/g1/89/259589/3/1123960... https://a4.pbase.com/g1/89/259589/3/112396030.z3bcxwYj.jpg — 200 — 25.6 KiB — 37 ms — h2https://a4.pbase.com/o4/87/331787/1/61501002.leica_r8_LR02999028420.jpga4.pbase.com/o4/87/331787/1/6150100... https://a4.pbase.com/o4/87/331787/1/61501002.leica_r8_LR02999028420.jpg — 200 — 15.1 KiB — 122 ms — h2https://a4.pbase.com/g9/17/104817/3/164329103.H5qfpVZD.jpga4.pbase.com/g9/17/104817/3/1643291... https://a4.pbase.com/g9/17/104817/3/164329103.H5qfpVZD.jpg — 200 — 30.6 KiB — 165 ms — h2https://a4.pbase.com/u38/world_images/upload/24960600.smlgflag.gifa4.pbase.com/u38/world_images/uploa... https://a4.pbase.com/u38/world_images/upload/24960600.smlgflag.gif — 200 — 5.2 KiB — 87 ms — h2https://pbase.com/favicon.ico/favicon.ico https://pbase.com/favicon.ico — 200 — 459 B — 9 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
48% of JavaScript execution is third-party
First-party Third-party 174ms · 0KB · €2/mo
Unattributable
Other
Optional
Execution 174ms
Transfer 0 KB
Monthly Cost €2/mo

48% of JavaScript execution time comes from third-party scripts.

Why this matters

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

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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