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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
94
GRADE
A
FIX
2
REVIEW
1
PASS
12
INFO
2

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
54
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
88
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.

1.27 s

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

1.27 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.

1.52 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.

1.27 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
12 PASS 1 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 (385.6 KiB of 391.3 KiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
D
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.
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present

No Cache-Control header

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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
391 KB transferred, 19 requests
PASS
391 KB transferred, 19 requests
Info::
Page weighs 1.5 MB (391 KB transferred)
Info::
19 HTTP requests
Info::
Estimated 0.08 g CO2 per page load
391 KB / 2.4 MB budget
391 KB transferred
19 requests
0.08 g CO2 per page load
JavaScript 341.2 KiB 87%
CSS 23.9 KiB 6%
HTML 13.2 KiB 3%
Images 9.7 KiB 2%
Other 2.7 KiB 1%
Other 455 B 0%
Other 142 B 0%
Other 0 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
Image Optimization
5 images, 0 KB saveable
PASS
5 images, 0 KB saveable
Info::
All images are well-optimized
5 images 10 KB
0 oversized -0 KB
2 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
169ms total JS execution
PASS
169ms total JS execution
Info::
Unattributable: 85ms CPU time
Info::
https://c2.com/: 84ms CPU time
Warning::
Third-party scripts: 85ms (51% of total)

Main Thread Breakdown

Other 53% Style & Layout 24% Script Evaluation 14% Rendering 4% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
Unattributable85ms4ms0ms3rd
https://c2.com/84ms14ms1ms1st
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
7 scripts, 0 KB unused
PASS
7 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.google-analytics.com/urchin.js7 KB—✓3rd
https://f.vimeocdn.com/p/4.46.43/js/player.module.js212 KB—✓3rd
https://f.vimeocdn.com/p/4.46.43/js/vendor.module.js93 KB—✓3rd
https://f.vimeocdn.com/js_opt/modules/utils/vuid.min.js1 KB—✓3rd
https://www.gstatic.com/cv/js/sender/v1/cast_sender.js?loadCastFramework=12 KB—✓3rd
https://www.gstatic.com/cast/sdk/libs/sender/1.0/cast_framework.js12 KB—✓3rd
https://www.gstatic.com/eureka/clank/147/cast_sender.js13 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 · 391 KB · 0 KB savings available
PASS
19 resources · 391 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 391 KB
Warning::
16 third-party resources (99% of weight)
Info::
1 resources over 200KB
19 resources · 391.3 KiB · 16 third-party Within 1MB page-weight target
JavaScript 87% · 341.2 KiB
CSS 6% · 23.9 KiB
Document 3% · 13.2 KiB
Image 3% · 12.4 KiB
Other 0% · 597 B
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 1519ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.3 s LCP 1.3 shttps://c2.com// https://c2.com/ — 200 — 1.9 KiB — 499 ms — http/1.1https://c2.com/c2.gif/c2.gif https://c2.com/c2.gif — 200 — 1.0 KiB — 165 ms — http/1.1https://www.google-analytics.com/urchin.jswww.google-analytics.com/urchin.js https://www.google-analytics.com/urchin.js — 200 — 7.3 KiB — 113 ms — h2https://player.vimeo.com/video/858385player.vimeo.com/video/858385 https://player.vimeo.com/video/858385 — 200 — 11.3 KiB — 329 ms — http/1.1https://ssl.google-analytics.com/__utm.gif?utmwv=1.4&utmn=788876444&utmcs=windows-1252&utmsr=412x823&utmsc=24-bit&utmul=en-us&utmje=0&utmfl=-&utmcn=1&utmdt=Cunningham%20%26%20Cunningham%2C%20Inc.&utmhn=c2.com&utmhid=419649407&utmr=-&utmp=/&utmac=UA-2377314-2&utmcc=__utma%3D69715522.788876444.1776892294.1776892294.1776892294.1%3B%2B__utmz%3D69715522.1776892294.1.1.utmccn%3D(direct)%7Cutmcsr%3D(direct)%7Cutmcmd%3D(none)%3B%2Bssl.google-analytics.com/__utm.gif?... https://ssl.google-analytics.com/__utm.gif?utmwv=1.4&utmn=788876444&utmcs=windows-1252&utmsr=412x823&utmsc=24-bit&utmul=en-us&utmje=0&utmfl=-&utmcn=1&utmdt=Cunningham%20%26%20Cunningham%2C%20Inc.&utmhn=c2.com&utmhid=419649407&utmr=-&utmp=/&utmac=UA-2377314-2&utmcc=__utma%3D69715522.788876444.1776892294.1776892294.1776892294.1%3B%2B__utmz%3D69715522.1776892294.1.1.utmccn%3D(direct)%7Cutmcsr%3D(direct)%7Cutmcmd%3D(none)%3B%2B — 200 — 603 B — 115 ms — h2https://f.vimeocdn.com/p/4.46.43/js/player.module.jsf.vimeocdn.com/p/4.46.43/js/player.... https://f.vimeocdn.com/p/4.46.43/js/player.module.js — 200 — 211.5 KiB — 76 ms — h2https://f.vimeocdn.com/p/4.46.43/js/vendor.module.jsf.vimeocdn.com/p/4.46.43/js/vendor.... https://f.vimeocdn.com/p/4.46.43/js/vendor.module.js — 200 — 93.3 KiB — 75 ms — h2https://f.vimeocdn.com/p/4.46.43/css/player.cssf.vimeocdn.com/p/4.46.43/css/player... https://f.vimeocdn.com/p/4.46.43/css/player.css — 200 — 23.9 KiB — 65 ms — h2https://i.vimeocdn.com/video/21002819-c96980b45fefa14a2ef8e779c2ed5ebc5ff56ca132710b81ad8d701f63c01e26-d?mw=80&q=85i.vimeocdn.com/video/21002819-c9698... https://i.vimeocdn.com/video/21002819-c96980b45fefa14a2ef8e779c2ed5ebc5ff56ca132710b81ad8d701f63c01e26-d?mw=80&q=85 — 200 — 1.2 KiB — 65 ms — h2https://c2.com/favicon.ico/favicon.ico https://c2.com/favicon.ico — 200 — 2.7 KiB — 164 ms — http/1.1https://f.vimeocdn.com/js_opt/modules/utils/vuid.min.jsf.vimeocdn.com/js_opt/modules/utils... https://f.vimeocdn.com/js_opt/modules/utils/vuid.min.js — 200 — 1.1 KiB — 2 ms — h2https://i.vimeocdn.com/video/21002819-c96980b45fefa14a2ef8e779c2ed5ebc5ff56ca132710b81ad8d701f63c01e26-d?mw=400&mh=226i.vimeocdn.com/video/21002819-c9698... https://i.vimeocdn.com/video/21002819-c96980b45fefa14a2ef8e779c2ed5ebc5ff56ca132710b81ad8d701f63c01e26-d?mw=400&mh=226 — 200 — 5.9 KiB — 119 ms — h2https://www.gstatic.com/cv/js/sender/v1/cast_sender.js?loadCastFramework=1www.gstatic.com/cv/js/sender/v1/cas... https://www.gstatic.com/cv/js/sender/v1/cast_sender.js?loadCastFramework=1 — 200 — 2.5 KiB — 114 ms — h2https://arclight.vimeo.com/add/player-stats?beacon=1&session-id=092a4f3adb2389de56c2d6d8696140a508192db81776892294arclight.vimeo.com/add/player-stats... https://arclight.vimeo.com/add/player-stats?beacon=1&session-id=092a4f3adb2389de56c2d6d8696140a508192db81776892294 — 200 — 142 B — 148 ms — h2https://i.vimeocdn.com/portrait/defaults-blue_60x60?region=usi.vimeocdn.com/portrait/defaults-bl... https://i.vimeocdn.com/portrait/defaults-blue_60x60?region=us — 200 — 955 B — 2 ms — h2https://orion.bendingspoons.com/v3/identity/settingsorion.bendingspoons.com/v3/identity... https://orion.bendingspoons.com/v3/identity/settings — 200 — 0 B — 202 ms — h2https://www.gstatic.com/cast/sdk/libs/sender/1.0/cast_framework.jswww.gstatic.com/cast/sdk/libs/sende... https://www.gstatic.com/cast/sdk/libs/sender/1.0/cast_framework.js — 200 — 12.1 KiB — 44 ms — h2https://www.gstatic.com/eureka/clank/147/cast_sender.jswww.gstatic.com/eureka/clank/147/ca... https://www.gstatic.com/eureka/clank/147/cast_sender.js — 200 — 13.4 KiB — 35 ms — h2https://orion.bendingspoons.com/v3/identity/settingsorion.bendingspoons.com/v3/identity... https://orion.bendingspoons.com/v3/identity/settings — 200 — 455 B — 129 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
51% of JavaScript execution is third-party
First-party Third-party 85ms · 0KB · $1/mo
Unattributable
Other
Optional
Execution 85ms
Transfer 0 KB
Monthly Cost $1/mo

51% 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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