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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
1
PASS
12
INFO
2

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

Mobile Desktop
92
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
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.

2.20 s

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

2.78 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.

0.010

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

3.39 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.

2.78 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
74% third-party, 0 ms blocking
FIX
74% third-party, 0 ms blocking
Warning::
Third-party code accounts for 74% of page weight (219.4 KiB of 297.8 KiB)
Info::
Third-party blocking time is low (0 ms)
26%
74%
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
298 KB transferred, 21 requests
PASS
298 KB transferred, 21 requests
Info::
Page weighs 669 KB (298 KB transferred)
Info::
21 HTTP requests
Info::
Estimated 0.06 g CO2 per page load
298 KB / 2.4 MB budget
298 KB transferred
21 requests
0.06 g CO2 per page load
HTML 122.0 KiB 41%
JavaScript 78.1 KiB 26%
CSS 40.1 KiB 13%
Fonts 37.6 KiB 13%
Images 18.7 KiB 6%
Other 954 B 0%
Other 471 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 19 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
475ms total JS execution
PASS
475ms total JS execution
Info::
https://platform.twitter.com/widgets.js: 154ms CPU time
Info::
https://nghttp2.org/: 128ms CPU time
Info::
Unattributable: 120ms CPU time
Info::
https://ajax.googleapis.com/ajax/libs/jquery/1.9.1...: 72ms CPU time
Warning::
Third-party scripts: 347ms (73% of total)

Main Thread Breakdown

Script Evaluation 39% Other 31% Style & Layout 19% Rendering 4% Script Parsing & Compilation 4% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://platform.twitter.com/widgets.js154ms124ms8ms3rd
https://nghttp2.org/128ms5ms1ms1st
Unattributable120ms4ms0ms3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js72ms46ms7ms3rd
A+
Font Loading
3 fonts (38 KB)
PASS
3 fonts (38 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

38 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.2 s LCP 2.8 shttps://fonts.gstatic.com/s/ptserif/v19/EJRVQgYoZZY2vCFuvAFWzr-_dSb_.woff2EJRVQgYoZZY2vCFuvAFWzr-... https://fonts.gstatic.com/s/ptserif/v19/EJRVQgYoZZY2vCFuvAFWzr-_dSb_.woff2 — 13.1 KiB — 27 ms — font-display: swaphttps://fonts.gstatic.com/s/ptsans/v18/jizaRExUiTo99u79D0KExcOPIDU.woff2jizaRExUiTo99u79D0KExcO... https://fonts.gstatic.com/s/ptsans/v18/jizaRExUiTo99u79D0KExcOPIDU.woff2 — 11.2 KiB — 37 ms — font-display: swaphttps://fonts.gstatic.com/s/ptserif/v19/EJRSQgYoZZY2vCFuvAnt66qSVyvVp8NA.woff2EJRSQgYoZZY2vCFuvAnt66q... https://fonts.gstatic.com/s/ptserif/v19/EJRSQgYoZZY2vCFuvAnt66qSVyvVp8NA.woff2 — 13.2 KiB — 31 ms — font-display: swap
EJRVQgYoZZY2vCFuvAFWzr-... woff2 swap
Size 13 KB
Load time 27 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
jizaRExUiTo99u79D0KExcO... woff2 swap
Size 11 KB
Load time 37 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
EJRSQgYoZZY2vCFuvAnt66q... woff2 swap
Size 13 KB
Load time 31 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
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+
JS Bundles
5 scripts, 0 KB unused
PASS
5 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://nghttp2.org/javascripts/modernizr-2.0.js7 KB—✓1st
https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js33 KB—✓3rd
https://nghttp2.org/javascripts/octopress.js8 KB—✓1st
https://platform.twitter.com/widgets.js27 KB—✓3rd
https://platform.twitter.com/js/button.856debeac157d9669cf51e73a08fbc93.js3 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
21 resources · 298 KB · 0 KB savings available
PASS
21 resources · 298 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 298 KB
Warning::
14 third-party resources (74% of weight)
21 resources · 297.8 KiB · 14 third-party Within 1MB page-weight target
Document 41% · 122.0 KiB
JavaScript 26% · 78.1 KiB
CSS 13% · 40.1 KiB
Font 13% · 37.6 KiB
Image 6% · 19.1 KiB
Other 0% · 954 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
21 requests over 2690ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.2 s LCP 2.8 shttps://nghttp2.org// https://nghttp2.org/ — 200 — 6.4 KiB — 850 ms — h2https://nghttp2.org/stylesheets/screen.css/stylesheets/screen.css https://nghttp2.org/stylesheets/screen.css — 200 — 38.3 KiB — 680 ms — h2https://nghttp2.org/javascripts/modernizr-2.0.js/javascripts/modernizr-2.0.js https://nghttp2.org/javascripts/modernizr-2.0.js — 200 — 6.9 KiB — 680 ms — h2https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.jsajax.googleapis.com/ajax/libs/jquer... https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js — 200 — 32.9 KiB — 119 ms — h2https://nghttp2.org/javascripts/octopress.js/javascripts/octopress.js https://nghttp2.org/javascripts/octopress.js — 200 — 8.2 KiB — 728 ms — h2https://fonts.googleapis.com/css?family=PT+Serif:regular,italic,bold,bolditalicfonts.googleapis.com/css?family=PT+... https://fonts.googleapis.com/css?family=PT+Serif:regular,italic,bold,bolditalic — 200 — 740 B — 101 ms — h2https://fonts.googleapis.com/css?family=PT+Sans:regular,italic,bold,bolditalicfonts.googleapis.com/css?family=PT+... https://fonts.googleapis.com/css?family=PT+Sans:regular,italic,bold,bolditalic — 200 — 1.1 KiB — 98 ms — h2https://platform.twitter.com/widgets.jsplatform.twitter.com/widgets.js https://platform.twitter.com/widgets.js — 200 — 27.3 KiB — 140 ms — h2https://nghttp2.org/images/line-tile.png?1413623488/images/line-tile.png?1413623488 https://nghttp2.org/images/line-tile.png?1413623488 — 200 — 708 B — 286 ms — h3https://nghttp2.org/images/noise.png?1413623488/images/noise.png?1413623488 https://nghttp2.org/images/noise.png?1413623488 — 200 — 17.4 KiB — 564 ms — h3data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAABCAYAAACsXeyTAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAF…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAABCAYAAACsXeyTAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAF… — 200 — 0 B — 0 ms — datahttps://fonts.gstatic.com/s/ptserif/v19/EJRVQgYoZZY2vCFuvAFWzr-_dSb_.woff2fonts.gstatic.com/s/ptserif/v19/EJR... https://fonts.gstatic.com/s/ptserif/v19/EJRVQgYoZZY2vCFuvAFWzr-_dSb_.woff2 — 200 — 13.1 KiB — 27 ms — h3https://fonts.gstatic.com/s/ptsans/v18/jizaRExUiTo99u79D0KExcOPIDU.woff2fonts.gstatic.com/s/ptsans/v18/jiza... https://fonts.gstatic.com/s/ptsans/v18/jizaRExUiTo99u79D0KExcOPIDU.woff2 — 200 — 11.2 KiB — 37 ms — h3https://fonts.gstatic.com/s/ptserif/v19/EJRSQgYoZZY2vCFuvAnt66qSVyvVp8NA.woff2fonts.gstatic.com/s/ptserif/v19/EJR... https://fonts.gstatic.com/s/ptserif/v19/EJRSQgYoZZY2vCFuvAnt66qSVyvVp8NA.woff2 — 200 — 13.2 KiB — 31 ms — h3https://platform.twitter.com/widgets/widget_iframe.2f70fb173b9000da126c79afe2098f02.html?origin=https%3A%2F%2Fnghttp2.orgplatform.twitter.com/widgets/widget... https://platform.twitter.com/widgets/widget_iframe.2f70fb173b9000da126c79afe2098f02.html?origin=https%3A%2F%2Fnghttp2.org — 200 — 103.4 KiB — 126 ms — h2https://syndication.twitter.com/settings?session_id=4939ca3afb29a6f9b37a4c12ef7c9292b5322564syndication.twitter.com/settings?se... https://syndication.twitter.com/settings?session_id=4939ca3afb29a6f9b37a4c12ef7c9292b5322564 — 200 — 954 B — 205 ms — h2https://platform.twitter.com/js/button.856debeac157d9669cf51e73a08fbc93.jsplatform.twitter.com/js/button.856d... https://platform.twitter.com/js/button.856debeac157d9669cf51e73a08fbc93.js — 200 — 2.7 KiB — 30 ms — h2https://syndication.twitter.com/i/jot/embeds?l=%7B%22widget_origin%22%3A%22https%3A%2F%2Fnghttp2.org%2F%22%2C%22widget_frame%22%3Afalse%2C%22language%22%3A%22en%22%2C%22message%22%3A%22m%3Anocount%3A%22%2C%22_category_%22%3A%22tfw_client_event%22%2C%22triggered_on%22%3A1776804920258%2C%22dnt%22%3Afalse%2C%22client_version%22%3A%222615f7e52b7e0%3A1702314776716%22%2C%22format_version%22%3A1%2C%22event_namespace%22%3A%7B%22client%22%3A%22tfw%22%2C%22page%22%3A%22button%22%2C%22section%22%3A%22share%22%2C%22action%22%3A%22impression%22%7D%7D&session_id=4939ca3afb29a6f9b37a4c12ef7c9292b5322564syndication.twitter.com/i/jot/embed... https://syndication.twitter.com/i/jot/embeds?l=%7B%22widget_origin%22%3A%22https%3A%2F%2Fnghttp2.org%2F%22%2C%22widget_frame%22%3Afalse%2C%22language%22%3A%22en%22%2C%22message%22%3A%22m%3Anocount%3A%22%2C%22_category_%22%3A%22tfw_client_event%22%2C%22triggered_on%22%3A1776804920258%2C%22dnt%22%3Afalse%2C%22client_version%22%3A%222615f7e52b7e0%3A1702314776716%22%2C%22format_version%22%3A1%2C%22event_namespace%22%3A%7B%22client%22%3A%22tfw%22%2C%22page%22%3A%22button%22%2C%22section%22%3A%22share%22%2C%22action%22%3A%22impression%22%7D%7D&session_id=4939ca3afb29a6f9b37a4c12ef7c9292b5322564 — 200 — 573 B — 242 ms — h2https://platform.twitter.com/widgets/tweet_button.2f70fb173b9000da126c79afe2098f02.en.htmlplatform.twitter.com/widgets/tweet_... https://platform.twitter.com/widgets/tweet_button.2f70fb173b9000da126c79afe2098f02.en.html — 200 — 12.2 KiB — 29 ms — h2data:image/svg+xml,%3C%3Fxml version='1.0' encoding='utf-8'%3F%3E%3Csvg viewBox='0 0 32 32' fill='n…data:image/svg+xml,%3C%3Fxml versio... data:image/svg+xml,%3C%3Fxml version='1.0' encoding='utf-8'%3F%3E%3Csvg viewBox='0 0 32 32' fill='n… — 200 — 0 B — 0 ms — datahttps://nghttp2.org/favicon.png/favicon.png https://nghttp2.org/favicon.png — 200 — 471 B — 283 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
73% of JavaScript execution is third-party
First-party Third-party 347ms · 60KB · $1/mo
Twitter/X Embed
Social
Optional
Execution 154ms
Transfer 27 KB
Monthly Cost $0/mo
Unattributable
Other
Optional
Execution 120ms
Transfer 0 KB
Monthly Cost $0/mo
ajax.googleapis.com
Other
Optional
Execution 72ms
Transfer 33 KB
Monthly Cost $0/mo

73% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

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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