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https://www.deepmind.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
3
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
89
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.
92
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.

975 ms

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

1.49 s

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

8 ms

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

0.001

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

2.36 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.

2.72 s

Page Load Progression

2.4 s
4.8 s
7.2 s
9.7 s
12.1 s
14.5 s
16.9 s
19.3 s
Checks
14
6 PASS 3 REVIEW 3 FIX
F
Page Weight Budget
Action
8.5 MB transferred, 153 requests
FIX
8.5 MB transferred, 153 requests
Critical::
Page weighs 27.5 MB (8.5 MB transferred)
Info::
Fonts are 2.5 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 2.5 MB
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Warning::
153 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.8 g CO2 per page load
8.5 MB / 2.4 MB budget
8.5 MB transferred
153 requests
1.8 g CO2 per page load
Other 3.3 MiB 39%
Fonts 2.5 MiB 29%
JavaScript 1.3 MiB 15%
Images 924.5 KiB 11%
HTML 357.7 KiB 4%
CSS 136.4 KiB 2%
Other 34.8 KiB 0%
Other 2.0 KiB 0%
Other 807 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (8.5 MiB of 8.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
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
50 images, 0 KB saveable
REVIEW
50 images, 0 KB saveable
Info::
All images are well-optimized
50 images 924 KB
0 oversized -0 KB
34 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1735ms total JS execution
REVIEW
1735ms total JS execution
Warning::
https://deepmind.google/static/dist/site/site-abad...: 992ms CPU time
Warning::
Unattributable: 465ms CPU time
Info::
https://deepmind.google/: 140ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-NRD...: 73ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-LS8H...: 66ms CPU time
Warning::
Third-party scripts: 1735ms (100% of total)

Main Thread Breakdown

Other 57% Script Evaluation 28% Style & Layout 8% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://deepmind.google/static/dist/site/site-abad8cda68861b08153b.js992ms305ms9ms3rd
Unattributable465ms33ms0ms3rd
https://deepmind.google/140ms3ms1ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NRDHXJGK73ms63ms8ms3rd
https://www.googletagmanager.com/gtag/js?id=G-LS8HVHCNQ0&cx=c&gtm=4e646066ms57ms8ms3rd
C
JS Bundles
Action
33 scripts, 223 KB unused
REVIEW
33 scripts, 223 KB unused
Warning::
https://deepmind.google/static/dist/site/site-abad...: 85 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NRD...: 77 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-LS8H...: 61 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 223 KB
223 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://deepmind.google/static/dist/site/site-abad8cda68861b08153b.js155 KB85 KB (55%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NRDHXJGK153 KB77 KB (51%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-LS8HVHCNQ0&cx=c&gtm=4e6460147 KB61 KB (42%)✓3rd
https://www.youtube.com/s/player/2430d1b0/player_embed_es6.vflset/en_US/base.js0 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.I-saIP3mOa8.2021.O/am=AAAABQ/d=1/exm=base,root/ed=1/br=1/rs=AGKMywGgGTExJs4NRA0c5nPXigdlDVJxcA/m=r78Drb0 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.I-saIP3mOa8.2021.O/am=AAAABQ/d=1/br=1/rs=AGKMywGgGTExJs4NRA0c5nPXigdlDVJxcA/m=root,base207 KB—✓3rd
https://www.youtube.com/s/player/2430d1b0/player_embed_es6.vflset/en_US/base.js432 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.I-saIP3mOa8.2021.O/am=AAAABQ/d=1/br=1/rs=AGKMywGgGTExJs4NRA0c5nPXigdlDVJxcA/m=root,base0 KB—✓3rd
https://www.youtube.com/s/player/2430d1b0/player_embed_es6.vflset/en_US/base.js0 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.I-saIP3mOa8.2021.O/am=AAAABQ/d=1/br=1/rs=AGKMywGgGTExJs4NRA0c5nPXigdlDVJxcA/m=root,base0 KB—✓3rd

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

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

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+
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+
Font Loading
8 fonts (2564 KB)
PASS
8 fonts (2564 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

2564 KB total

Render-blocking

0

of 8

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 FCP 975 ms LCP 1.5 shttps://fonts.gstatic.com/s/googlesansflex/v19/t5svIQcYNIWbFgDgAAzZ34auoVyXkJCOvp3SFWJbN5hF8Ju1x6sKCyp0l9sI40swNJwGpVd4AZzz0v6lJ4qFXNZhGjLvDSkV4W6GGn9Q3I8i.woff2t5svIQcYNIWbFgDgAAzZ34a... https://fonts.gstatic.com/s/googlesansflex/v19/t5svIQcYNIWbFgDgAAzZ34auoVyXkJCOvp3SFWJbN5hF8Ju1x6sKCyp0l9sI40swNJwGpVd4AZzz0v6lJ4qFXNZhGjLvDSkV4W6GGn9Q3I8i.woff2 — 117.4 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesymbols/v414/HhyqU5Ak9u-oMExPeInvcuEmPosC9zS3FYkFU68cPrjdKM1XMoDZlWmzc_IiWvF1SbxVhQidBnt_COyl9mm4Tw.woff2HhyqU5Ak9u-oMExPeInvcuE... https://fonts.gstatic.com/s/googlesymbols/v414/HhyqU5Ak9u-oMExPeInvcuEmPosC9zS3FYkFU68cPrjdKM1XMoDZlWmzc_IiWvF1SbxVhQidBnt_COyl9mm4Tw.woff2 — 2.4 MiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swap
t5svIQcYNIWbFgDgAAzZ34a... woff2 swap
Size 117 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
HhyqU5Ak9u-oMExPeInvcuE... woff2 swap
Size 2412 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 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)

Fixing the unchecked items could save ~1265 KB and ~2530 ms

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+
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

Network Waterfall
153 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 1735ms · 490KB · €28/mo
deepmind.google
Other
Costly
Execution 992ms
Transfer 155 KB
Unused 55%
Monthly Cost €16/mo
Unattributable
Other
Costly
Execution 465ms
Transfer 0 KB
Monthly Cost €7/mo
deepmind.google
Other
Optional
Execution 140ms
Transfer 36 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 73ms
Transfer 153 KB
Unused 51%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 66ms
Transfer 147 KB
Unused 42%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • deepmind.google adds 992ms and costs ~€16/month
  • Unattributable adds 465ms and costs ~€7/month

100% 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

deepmind.google takes 992ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

55% of deepmind.google's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Unattributable takes 465ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

51% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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