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https://jcp.org

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
1
REVIEW
2
PASS
10
INFO
2

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

Mobile Desktop
96
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
56
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
91
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.

378 ms

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

678 ms

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.

0.119

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

610 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

678 ms

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
15
10 PASS 2 REVIEW 1 FIX
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
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Info::
All images are well-optimized
21 images 179 KB
0 oversized -0 KB
21 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
259 KB transferred, 33 requests
PASS
259 KB transferred, 33 requests
Info::
Page weighs 436 KB (259 KB transferred)
Info::
33 HTTP requests
Info::
Estimated 0.05 g CO2 per page load
259 KB / 2.4 MB budget
259 KB transferred
33 requests
0.05 g CO2 per page load
Images 179.3 KiB 69%
JavaScript 62.1 KiB 24%
HTML 9.3 KiB 4%
CSS 5.0 KiB 2%
Other 2.0 KiB 1%
Other 870 B 0%
Other 220 B 0%
0 2.4 MB 4.9 MB
Under budget
A
Third-Party Impact
22% third-party, 0 ms blocking
PASS
22% third-party, 0 ms blocking
Info::
Third-party code accounts for 22% of page weight (57.8 KiB of 258.7 KiB)
Info::
Third-party blocking time is low (0 ms)
78%
22%
First-party Third-party
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
115ms total JS execution
PASS
115ms total JS execution
Info::
Unattributable: 62ms CPU time
Info::
https://jcp.org/en/home/index: 53ms CPU time
Warning::
Third-party scripts: 62ms (54% of total)

Main Thread Breakdown

Other 47% Script Evaluation 30% Style & Layout 12% Rendering 5% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
Unattributable62ms1ms0ms3rd
https://jcp.org/en/home/index53ms10ms1ms1st
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
3 scripts, 27 KB unused
PASS
3 scripts, 27 KB unused
Warning::
https://s.go-mpulse.net/boomerang/UE9G5-FVEGY-MA38...: 27 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 27 KB
27 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://s.go-mpulse.net/boomerang/UE9G5-FVEGY-MA38N-LMMNY-SBQP257 KB27 KB (47%)✓3rd
https://jcp.org/includes/scripts/tabs.js2 KB—✓1st
https://jcp.org/includes/scripts/menu.js3 KB—✓1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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
33 resources · 259 KB · 27 KB savings available
PASS
33 resources · 259 KB · 27 KB savings available
Info::
Within 1MB page-weight target
Got: 259 KB
Info::
3 third-party resources (22% of weight)
33 resources · 258.7 KiB · 3 third-party Within 1MB page-weight target
Image 70% · 180.5 KiB
JavaScript 24% · 62.1 KiB
Document 4% · 10.3 KiB
CSS 2% · 5.0 KiB
Other 0% · 870 B

~26.7 KiB of savings available

Remove unused JavaScript: 26.7 KiB
Network Waterfall
33 requests over 1283ms
INFO
0 ms 500 ms 1.0 s FCP 378 ms LCP 678 mshttps://jcp.org// https://jcp.org/ — 302 — 1.1 KiB — 257 ms — h2http://jcp.org/en/home/index/en/home/index http://jcp.org/en/home/index — 307 — 0 B — 1 ms — http/1.1https://jcp.org/en/home/index/en/home/index https://jcp.org/en/home/index — 200 — 9.3 KiB — 327 ms — h2https://jcp.org/includes/css/menu.css/includes/css/menu.css https://jcp.org/includes/css/menu.css — 200 — 1.1 KiB — 25 ms — h2https://jcp.org/includes/css/style.css/includes/css/style.css https://jcp.org/includes/css/style.css — 200 — 2.6 KiB — 25 ms — h2https://jcp.org/includes/css/tabs.css/includes/css/tabs.css https://jcp.org/includes/css/tabs.css — 200 — 1.2 KiB — 26 ms — h2https://jcp.org/includes/scripts/tabs.js/includes/scripts/tabs.js https://jcp.org/includes/scripts/tabs.js — 200 — 2.0 KiB — 27 ms — h2https://jcp.org/includes/scripts/menu.js/includes/scripts/menu.js https://jcp.org/includes/scripts/menu.js — 200 — 3.3 KiB — 38 ms — h2https://jcp.org/images/spacer.gif/images/spacer.gif https://jcp.org/images/spacer.gif — 200 — 593 B — 39 ms — h2https://jcp.org/images/ad_banner2.gif/images/ad_banner2.gif https://jcp.org/images/ad_banner2.gif — 200 — 4.0 KiB — 39 ms — h2https://jcp.org/images/global/spacer.gif/images/global/spacer.gif https://jcp.org/images/global/spacer.gif — 200 — 592 B — 13 ms — h2https://jcp.org/images/Facebook_Logo_Primary.png/images/Facebook_Logo_Primary.png https://jcp.org/images/Facebook_Logo_Primary.png — 200 — 54.1 KiB — 21 ms — h2https://s.go-mpulse.net/boomerang/UE9G5-FVEGY-MA38N-LMMNY-SBQP2s.go-mpulse.net/boomerang/UE9G5-FVE... https://s.go-mpulse.net/boomerang/UE9G5-FVEGY-MA38N-LMMNY-SBQP2 — 200 — 56.8 KiB — 26 ms — h2https://jcp.org/images/logo-black.png/images/logo-black.png https://jcp.org/images/logo-black.png — 200 — 100.5 KiB — 25 ms — h2https://jcp.org/images/button_go.gif/images/button_go.gif https://jcp.org/images/button_go.gif — 200 — 925 B — 26 ms — h2https://jcp.org/images/hr_dots1.gif/images/hr_dots1.gif https://jcp.org/images/hr_dots1.gif — 200 — 617 B — 26 ms — h2https://jcp.org/images/hd_find-jsrs.gif/images/hd_find-jsrs.gif https://jcp.org/images/hd_find-jsrs.gif — 200 — 1.0 KiB — 29 ms — h2https://jcp.org/images/hd_my-jcp.gif/images/hd_my-jcp.gif https://jcp.org/images/hd_my-jcp.gif — 200 — 1.1 KiB — 30 ms — h2https://jcp.org/images/hd_jcp-info.gif/images/hd_jcp-info.gif https://jcp.org/images/hd_jcp-info.gif — 200 — 1.1 KiB — 31 ms — h2https://jcp.org/images/common/trans.gif/images/common/trans.gif https://jcp.org/images/common/trans.gif — 200 — 600 B — 32 ms — h2https://jcp.org/images/global/bar_green.gif/images/global/bar_green.gif https://jcp.org/images/global/bar_green.gif — 200 — 597 B — 33 ms — h2https://jcp.org/images/global/hd_quick-links.gif/images/global/hd_quick-links.gif https://jcp.org/images/global/hd_quick-links.gif — 200 — 1.1 KiB — 34 ms — h2https://jcp.org/images/global/hd_news.gif/images/global/hd_news.gif https://jcp.org/images/global/hd_news.gif — 200 — 1.0 KiB — 35 ms — h2https://jcp.org/images/global/hr_dots1.gif/images/global/hr_dots1.gif https://jcp.org/images/global/hr_dots1.gif — 200 — 644 B — 35 ms — h2https://jcp.org/images/common/logo_oracle_footer.gif/images/common/logo_oracle_footer.g... https://jcp.org/images/common/logo_oracle_footer.gif — 200 — 1.0 KiB — 36 ms — h2https://jcp.org/images/logo2.gif/images/logo2.gif https://jcp.org/images/logo2.gif — 200 — 6.9 KiB — 37 ms — h2https://jcp.org/images/nav-arrow.gif/images/nav-arrow.gif https://jcp.org/images/nav-arrow.gif — 200 — 605 B — 36 ms — h2https://jcp.org/images/arrow_submenus.gif/images/arrow_submenus.gif https://jcp.org/images/arrow_submenus.gif — 200 — 630 B — 37 ms — h2https://jcp.org/images/dots.gif/images/dots.gif https://jcp.org/images/dots.gif — 200 — 619 B — 38 ms — h2https://jcp.org/images/bar_bot.gif/images/bar_bot.gif https://jcp.org/images/bar_bot.gif — 200 — 1.3 KiB — 13 ms — h2
0 ms 500 ms 1.0 s FCP 378 ms LCP 678 mshttps://jcp.org// https://jcp.org/ — 302 — 1.1 KiB — 257 ms — h2http://jcp.org/en/home/index/en/home/index http://jcp.org/en/home/index — 307 — 0 B — 1 ms — http/1.1https://jcp.org/en/home/index/en/home/index https://jcp.org/en/home/index — 200 — 9.3 KiB — 327 ms — h2https://jcp.org/includes/css/menu.css/includes/css/menu.css https://jcp.org/includes/css/menu.css — 200 — 1.1 KiB — 25 ms — h2https://jcp.org/includes/css/style.css/includes/css/style.css https://jcp.org/includes/css/style.css — 200 — 2.6 KiB — 25 ms — h2https://jcp.org/includes/css/tabs.css/includes/css/tabs.css https://jcp.org/includes/css/tabs.css — 200 — 1.2 KiB — 26 ms — h2https://jcp.org/includes/scripts/tabs.js/includes/scripts/tabs.js https://jcp.org/includes/scripts/tabs.js — 200 — 2.0 KiB — 27 ms — h2https://jcp.org/includes/scripts/menu.js/includes/scripts/menu.js https://jcp.org/includes/scripts/menu.js — 200 — 3.3 KiB — 38 ms — h2https://jcp.org/images/spacer.gif/images/spacer.gif https://jcp.org/images/spacer.gif — 200 — 593 B — 39 ms — h2https://jcp.org/images/ad_banner2.gif/images/ad_banner2.gif https://jcp.org/images/ad_banner2.gif — 200 — 4.0 KiB — 39 ms — h2https://jcp.org/images/global/spacer.gif/images/global/spacer.gif https://jcp.org/images/global/spacer.gif — 200 — 592 B — 13 ms — h2https://jcp.org/images/Facebook_Logo_Primary.png/images/Facebook_Logo_Primary.png https://jcp.org/images/Facebook_Logo_Primary.png — 200 — 54.1 KiB — 21 ms — h2https://s.go-mpulse.net/boomerang/UE9G5-FVEGY-MA38N-LMMNY-SBQP2s.go-mpulse.net/boomerang/UE9G5-FVE... https://s.go-mpulse.net/boomerang/UE9G5-FVEGY-MA38N-LMMNY-SBQP2 — 200 — 56.8 KiB — 26 ms — h2https://jcp.org/images/logo-black.png/images/logo-black.png https://jcp.org/images/logo-black.png — 200 — 100.5 KiB — 25 ms — h2https://jcp.org/images/button_go.gif/images/button_go.gif https://jcp.org/images/button_go.gif — 200 — 925 B — 26 ms — h2https://jcp.org/images/hr_dots1.gif/images/hr_dots1.gif https://jcp.org/images/hr_dots1.gif — 200 — 617 B — 26 ms — h2https://jcp.org/images/hd_find-jsrs.gif/images/hd_find-jsrs.gif https://jcp.org/images/hd_find-jsrs.gif — 200 — 1.0 KiB — 29 ms — h2https://jcp.org/images/hd_my-jcp.gif/images/hd_my-jcp.gif https://jcp.org/images/hd_my-jcp.gif — 200 — 1.1 KiB — 30 ms — h2https://jcp.org/images/hd_jcp-info.gif/images/hd_jcp-info.gif https://jcp.org/images/hd_jcp-info.gif — 200 — 1.1 KiB — 31 ms — h2https://jcp.org/images/common/trans.gif/images/common/trans.gif https://jcp.org/images/common/trans.gif — 200 — 600 B — 32 ms — h2https://jcp.org/images/global/bar_green.gif/images/global/bar_green.gif https://jcp.org/images/global/bar_green.gif — 200 — 597 B — 33 ms — h2https://jcp.org/images/global/hd_quick-links.gif/images/global/hd_quick-links.gif https://jcp.org/images/global/hd_quick-links.gif — 200 — 1.1 KiB — 34 ms — h2https://jcp.org/images/global/hd_news.gif/images/global/hd_news.gif https://jcp.org/images/global/hd_news.gif — 200 — 1.0 KiB — 35 ms — h2https://jcp.org/images/global/hr_dots1.gif/images/global/hr_dots1.gif https://jcp.org/images/global/hr_dots1.gif — 200 — 644 B — 35 ms — h2https://jcp.org/images/common/logo_oracle_footer.gif/images/common/logo_oracle_footer.g... https://jcp.org/images/common/logo_oracle_footer.gif — 200 — 1.0 KiB — 36 ms — h2https://jcp.org/images/logo2.gif/images/logo2.gif https://jcp.org/images/logo2.gif — 200 — 6.9 KiB — 37 ms — h2https://jcp.org/images/nav-arrow.gif/images/nav-arrow.gif https://jcp.org/images/nav-arrow.gif — 200 — 605 B — 36 ms — h2https://jcp.org/images/arrow_submenus.gif/images/arrow_submenus.gif https://jcp.org/images/arrow_submenus.gif — 200 — 630 B — 37 ms — h2https://jcp.org/images/dots.gif/images/dots.gif https://jcp.org/images/dots.gif — 200 — 619 B — 38 ms — h2https://jcp.org/images/bar_bot.gif/images/bar_bot.gif https://jcp.org/images/bar_bot.gif — 200 — 1.3 KiB — 13 ms — h2https://jcp.org/favicon.ico/favicon.ico https://jcp.org/favicon.ico — 200 — 946 B — 18 ms — h2https://c.go-mpulse.net/api/config.json?key=UE9G5-FVEGY-MA38N-LMMNY-SBQP2&d=jcp.org&t=5922972&v=1.720.0&if=&sl=0&si=9c0fc0f4-097d-4eeb-b581-7ab9b795894c-tdwye7&plugins=AK,ConfigOverride,Continuity,PageParams,IFrameDelay,AutoXHR,SPA,History,Angular,Backbone,Ember,RT,CrossDomain,BW,PaintTiming,NavigationTiming,ResourceTiming,Memory,CACHE_RELOAD,Errors,TPAnalytics,UserTiming,Akamai,Early,EventTiming,LOGN&acao=&ak.ai=695954c.go-mpulse.net/api/config.json?key... https://c.go-mpulse.net/api/config.json?key=UE9G5-FVEGY-MA38N-LMMNY-SBQP2&d=jcp.org&t=5922972&v=1.720.0&if=&sl=0&si=9c0fc0f4-097d-4eeb-b581-7ab9b795894c-tdwye7&plugins=AK,ConfigOverride,Continuity,PageParams,IFrameDelay,AutoXHR,SPA,History,Angular,Backbone,Ember,RT,CrossDomain,BW,PaintTiming,NavigationTiming,ResourceTiming,Memory,CACHE_RELOAD,Errors,TPAnalytics,UserTiming,Akamai,Early,EventTiming,LOGN&acao=&ak.ai=695954 — 200 — 870 B — 222 ms — h2https://0217991e.akstat.io/0217991e.akstat.io/ https://0217991e.akstat.io/ — 204 — 220 B — 252 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
54% of JavaScript execution is third-party
First-party Third-party 62ms · 0KB · $1/mo
Unattributable
Other
Optional
Execution 62ms
Transfer 0 KB
Monthly Cost $1/mo

54% 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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