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https://dns.google

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
94
GRADE
A
FIX
1
REVIEW
0
PASS
12
INFO
1

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
90
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.

569 ms

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

1.04 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.

0.007

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

569 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.

1.04 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
14
12 PASS 1 FIX
D
Third-Party Impact
Action
72% third-party, 0 ms blocking
FIX
72% third-party, 0 ms blocking
Warning::
Third-party code accounts for 72% of page weight (23.9 KiB of 33.2 KiB)
Info::
Third-party blocking time is low (0 ms)
28%
72%
First-party Third-party
A+
Page Weight Budget
33 KB transferred, 9 requests
PASS
33 KB transferred, 9 requests
Info::
Page weighs 68 KB (33 KB transferred)
Info::
9 HTTP requests
Info::
Estimated 0.01 g CO2 per page load
33 KB / 2.4 MB budget
33 KB transferred
9 requests
0.01 g CO2 per page load
Fonts 16.1 KiB 48%
CSS 8.6 KiB 26%
Images 5.9 KiB 18%
HTML 1.5 KiB 4%
Other 1.1 KiB 3%
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
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 6 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
64ms total JS execution
PASS
64ms total JS execution
Info::
https://dns.google/: 64ms CPU time

Main Thread Breakdown

Style & Layout 45% Other 43% Rendering 5% Script Evaluation 4%
ScriptTotalScriptingParse/CompileParty
https://dns.google/64ms2ms0ms1st
A+
Font Loading
1 fonts (16 KB)
PASS
1 fonts (16 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

16 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 569 ms LCP 1.0 shttps://fonts.gstatic.com/s/roboto/v51/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0klQmz24.woff2KFOMCnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0klQmz24.woff2 — 16.1 KiB — 96 ms — font-display: swap
KFOMCnqEu92Fr1ME7kSn66a... woff2 swap
Size 16 KB
Load time 96 ms
Start 295 ms
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
No JavaScript
PASS
No JavaScript
Info::
No JavaScript bundles
No JavaScript files loaded.
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
9 resources · 33 KB · 0 KB savings available
PASS
9 resources · 33 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 33 KB
Warning::
4 third-party resources (72% of weight)
9 resources · 33.2 KiB · 4 third-party Within 1MB page-weight target
Font 48% · 16.1 KiB
CSS 26% · 8.6 KiB
Image 21% · 7.0 KiB
Document 4% · 1.5 KiB
Other 0% · 0 B
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

A
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: public, max-age=300
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=300

DirectiveValueMeaning
public—Any cache may store this response
max-age300Cache for 5 minutes
Effective TTL: 300 seconds
Network Waterfall
9 requests over 422ms
INFO
0 ms 500 ms 1.0 s FCP 569 ms LCP 1.0 shttps://dns.google// https://dns.google/ — 200 — 1.5 KiB — 24 ms — h2https://dns.google/static/e6eca759/matter.min.css/static/e6eca759/matter.min.css https://dns.google/static/e6eca759/matter.min.css — 200 — 4.8 KiB — 31 ms — h2https://dns.google/static/b8536c37/shared.css/static/b8536c37/shared.css https://dns.google/static/b8536c37/shared.css — 200 — 1.2 KiB — 32 ms — h2https://dns.google/static/d05cd6ba/root.css/static/d05cd6ba/root.css https://dns.google/static/d05cd6ba/root.css — 200 — 734 B — 28 ms — h2https://csp.withgoogle.com/csp/scaffolding/ntdsgswbsc:55:0csp.withgoogle.com/csp/scaffolding/... https://csp.withgoogle.com/csp/scaffolding/ntdsgswbsc:55:0 — -1 — 0 B — 164 ms — https://fonts.googleapis.com/css2?family=Roboto&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto&display=swap — 200 — 2.0 KiB — 169 ms — h2https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.pngwww.google.com/images/branding/goog... https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png — 200 — 5.9 KiB — 81 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0klQmz24.woff2fonts.gstatic.com/s/roboto/v51/KFOM... https://fonts.gstatic.com/s/roboto/v51/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0klQmz24.woff2 — 200 — 16.1 KiB — 96 ms — h3https://dns.google/static/93dd5954/favicon.png/static/93dd5954/favicon.png https://dns.google/static/93dd5954/favicon.png — 200 — 1.1 KiB — 22 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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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