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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
5
REVIEW
1
PASS
7
INFO
2

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

Mobile Desktop
32
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
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.

3.15 s

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

5.67 s

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

794 ms

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

0.003

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

3.43 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.

6.29 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
15
7 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
4.9 MB transferred, 73 requests
FIX
4.9 MB transferred, 73 requests
Critical::
Page weighs 16.5 MB (4.9 MB transferred)
Warning::
JavaScript is 3.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.3 MB
Info::
Fonts are 809 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 809 KB
Info::
73 HTTP requests
Info::
Estimated 1.0 g CO2 per page load
4.9 MB / 2.4 MB budget
4.9 MB transferred
73 requests
1.0 g CO2 per page load
JavaScript 3.3 MiB 68%
Fonts 809.3 KiB 16%
Other 622.4 KiB 12%
CSS 101.0 KiB 2%
HTML 54.0 KiB 1%
Other 9.3 KiB 0%
Images 2.2 KiB 0%
Other 1.2 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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

D
Third-Party Impact
Action
87% third-party, 0 ms blocking
FIX
87% third-party, 0 ms blocking
Warning::
Third-party code accounts for 87% of page weight (4.2 MiB of 4.9 MiB)
Info::
Third-party blocking time is low (0 ms)
87%
First-party Third-party
D
JS Execution Cost
Action
2700ms total JS execution
FIX
2700ms total JS execution
Warning::
https://ssl.gstatic.com/colaboratory-static/common...: 1058ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 467ms CPU time
Warning::
https://ssl.gstatic.com/colaboratory-static/common...: 440ms CPU time
Warning::
https://colab.research.google.com/: 263ms CPU time
Info::
https://ssl.gstatic.com/colaboratory-static/common...: 180ms CPU time
Warning::
Third-party scripts: 2376ms (88% of total)

Main Thread Breakdown

Script Evaluation 62% Script Parsing & Compilation 15% Style & Layout 11% Other 7%
ScriptTotalScriptingParse/CompileParty
https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/js%2Fmonaco_editor%2F/vs/editor/editor.main.nls.js1058ms889ms3ms3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js467ms341ms113ms3rd
https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/external_binary.js440ms242ms181ms3rd
https://colab.research.google.com/263ms9ms5ms1st
https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/js%2Fmonaco_editor%2F/vs/editor/editor.main.js180ms56ms109ms3rd
Unattributable172ms27ms0ms3rd
https://colab.research.google.com/static/mathjax/jax/output/HTML-CSS/fonts/TeX/fontdata.js?V=2.7.561ms12ms1ms1st
https://www.googletagmanager.com/gtag/js?id=G-S3V05QCXK5&cx=c&_slc=158ms44ms13ms3rd
F
JS Bundles
Action
27 scripts, 2.3 MB unused
FIX
27 scripts, 2.3 MB unused
Warning::
https://ssl.gstatic.com/colaboratory-static/common...: 898 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ssl.gstatic.com/colaboratory-static/common...: 603 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 2.3 MB
2323 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/external_binary.js1569 KB898 KB (57%)✓3rd
https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/js%2Fmonaco_editor%2F/vs/editor/editor.main.js837 KB603 KB (72%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-S3V05QCXK5&cx=c&_slc=1148 KB64 KB (43%)✓3rd
https://colab.research.google.com/static/mathjax/config/TeX-AMS_HTML-full.js?V=2.7.589 KB58 KB (65%)✓1st
https://www.gstatic.com/og/_/js/k=og.qtm.en_US.Z6E9e-jZ3gE.2019.O/rt=j/m=qabr,q_dnp,qcwid,qapid,qads,q_dg/exm=qaaw,qadd,qaid,qein,qhaw,qhba,qhbr,qhch,qhga,qhid,qhin/d=1/ed=1/rs=AA2YrTtnYMWhnj_5JFE_4rY8kYjgFBEDSA84 KB58 KB (69%)✓3rd
https://apis.google.com/_/scs/abc-static/_/js/k=gapi.gapi.en.5G9F9JPGjf8.O/m=client/exm=gapi_iframes,googleapis_client/rt=j/sv=1/d=1/ed=1/rs=AHpOoo-OYuAVGK84U6cg5lkjGc85qYpeMw/cb=gapi.loaded_170 KB56 KB (80%)✓3rd
https://www.gstatic.com/feedback/js/help/prod/service/lazy.min.js40 KB30 KB (77%)✓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

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

F
Page Weight Inventory
Action
73 resources · 4.9 MB · 2.3 MB savings available
FIX
73 resources · 4.9 MB · 2.3 MB savings available
Warning::
Page weight 3.9 MB over 1MB target
Got: 4.9 MB Expected: ≤ 1 MB
Info::
~2.3 MB of savings available
Warning::
58 third-party resources (87% of weight)
Info::
5 resources over 200KB
73 resources · 4.9 MiB · 58 third-party 3.9 MiB over 1MB target
JavaScript 71% · 3.5 MiB
Font 16% · 809.3 KiB
Other 9% · 433.6 KiB
CSS 2% · 103.3 KiB
Document 2% · 74.9 KiB
Image 0% · 11.5 KiB

~2.3 MiB of savings available

Remove unused JavaScript: 2.3 MiB
B
HTTP Caching
no-cache, must-revalidate
REVIEW
no-cache, must-revalidate
Info::
Cache-Control header is set
Got: no-cache, must-revalidate
Info::
ETag present — enables conditional (304) responses
Cache-Control

no-cache, must-revalidate

DirectiveValueMeaning
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
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
Warning::
data:image/webp;base64,UklGRuAWAABXRUJQVlA4TNMWAAA... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
5 images 2 KB
0 oversized -0 KB
2 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

A+
Font Loading
13 fonts (809 KB)
PASS
13 fonts (809 KB)
Info::
13 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

13

809 KB total

Render-blocking

0

of 13

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 3.2 s LCP 5.7 shttps://fonts.gstatic.com/s/googlesanstext/v25/5aUu9-KzpRiLCAt4Unrc-xIKmCU5qEp2i0VBuxM.woff25aUu9-KzpRiLCAt4Unrc-xI... https://fonts.gstatic.com/s/googlesanstext/v25/5aUu9-KzpRiLCAt4Unrc-xIKmCU5qEp2i0VBuxM.woff2 — 21.6 KiB — 12 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesymbols/v419/HhzZU5Ak9u-oMExPeInvcuEmPosC9zS3FYkFU68cPrjdKM1XMoDZlWmzc3IiWvF1SbxVhQidBnv_C_ar1J9g0sLBUv3G8taXmBpH-Bw.woff2HhzZU5Ak9u-oMExPeInvcuE... https://fonts.gstatic.com/s/googlesymbols/v419/HhzZU5Ak9u-oMExPeInvcuEmPosC9zS3FYkFU68cPrjdKM1XMoDZlWmzc3IiWvF1SbxVhQidBnv_C_ar1J9g0sLBUv3G8taXmBpH-Bw.woff2 — 534.3 KiB — 36 ms — font-display: swaphttps://colab.research.google.com/static/mathjax/fonts/HTML-CSS/TeX/woff/MathJax_Main-Regular.woff?V=2.7.5MathJax_Main-Regular.woff https://colab.research.google.com/static/mathjax/fonts/HTML-CSS/TeX/woff/MathJax_Main-Regular.woff?V=2.7.5 — 33.4 KiB — 66 ms — font-display: swaphttps://colab.research.google.com/static/mathjax/fonts/HTML-CSS/TeX/woff/MathJax_Math-Italic.woff?V=2.7.5MathJax_Math-Italic.woff https://colab.research.google.com/static/mathjax/fonts/HTML-CSS/TeX/woff/MathJax_Math-Italic.woff?V=2.7.5 — 18.9 KiB — 176 ms — font-display: swaphttps://colab.research.google.com/static/mathjax/fonts/HTML-CSS/TeX/woff/MathJax_Size1-Regular.woff?V=2.7.5MathJax_Size1-Regular.woff https://colab.research.google.com/static/mathjax/fonts/HTML-CSS/TeX/woff/MathJax_Size1-Regular.woff?V=2.7.5 — 5.7 KiB — 169 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff2 — 35.3 KiB — 13 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 14 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oLlVnmhjtjm4DZw.woff25aUp9-KzpRiLCAt4Unrc-xI... https://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oLlVnmhjtjm4DZw.woff2 — 22.8 KiB — 10 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oLlVngZjtjm4DZzFQQ.woff25aUp9-KzpRiLCAt4Unrc-xI... https://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oLlVngZjtjm4DZzFQQ.woff2 — 12.6 KiB — 14 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oPFTnmhjtjm4DZw.woff25aUp9-KzpRiLCAt4Unrc-xI... https://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oPFTnmhjtjm4DZw.woff2 — 22.3 KiB — 6 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesanstext/v25/5aUu9-KzpRiLCAt4Unrc-xIKmCU5qCR2i0VBuxOCBA.woff25aUu9-KzpRiLCAt4Unrc-xI... https://fonts.gstatic.com/s/googlesanstext/v25/5aUu9-KzpRiLCAt4Unrc-xIKmCU5qCR2i0VBuxOCBA.woff2 — 12.0 KiB — 10 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPlwUvbQoi-Entw.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPlwUvbQoi-Entw.woff2 — 19.8 KiB — 7 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 5 ms — font-display: swap
5aUu9-KzpRiLCAt4Unrc-xI... woff2 swap
Size 22 KB
Load time 12 ms
Start 836 ms
Risk FOUT — text flashes from fallback to web font
HhzZU5Ak9u-oMExPeInvcuE... woff2 swap
Size 534 KB
Load time 36 ms
Start 837 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
MathJax_Main-Regular.woff woff swap
Size 33 KB
Load time 66 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
MathJax_Math-Italic.woff woff swap
Size 19 KB
Load time 176 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
MathJax_Size1-Regular.woff woff swap
Size 6 KB
Load time 169 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 35 KB
Load time 13 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 14 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
5aUp9-KzpRiLCAt4Unrc-xI... woff2 swap
Size 23 KB
Load time 10 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
5aUp9-KzpRiLCAt4Unrc-xI... woff2 swap
Size 13 KB
Load time 14 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
5aUp9-KzpRiLCAt4Unrc-xI... woff2 swap
Size 22 KB
Load time 6 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
5aUu9-KzpRiLCAt4Unrc-xI... woff2 swap
Size 12 KB
Load time 10 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 20 KB
Load time 7 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 5 ms
Start 3.0 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)

Fixing the unchecked items could save ~285 KB and ~570 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
73 requests over 3268ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 3.2 s LCP 5.7 shttps://colab.research.google.com// https://colab.research.google.com/ — 200 — 24.8 KiB — 74 ms — h2https://fonts.googleapis.com/css2?family=Google+Symbols:FILL@0..1&display=blockfonts.googleapis.com/css2?family=Go... https://fonts.googleapis.com/css2?family=Google+Symbols:FILL@0..1&display=block — 200 — 919 B — 46 ms — h2https://fonts.googleapis.com/css?family=Roboto:300,400,500,600,700|Google+Sans:300,400,500,600,700|Google+Sans+Text:400,500,700&display=blockfonts.googleapis.com/css?family=Rob... https://fonts.googleapis.com/css?family=Roboto:300,400,500,600,700|Google+Sans:300,400,500,600,700|Google+Sans+Text:400,500,700&display=block — 200 — 4.1 KiB — 71 ms — h2https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/v2/external/bundle.cssssl.gstatic.com/colaboratory-static... https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/v2/external/bundle.css — 200 — 35.8 KiB — 37 ms — h2https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/gapi_loader.jsssl.gstatic.com/colaboratory-static... https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/gapi_loader.js — 200 — 7.1 KiB — 31 ms — h2https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/socketio_binary.jsssl.gstatic.com/colaboratory-static... https://ssl.gstatic.com/colaboratory-static/common/624e67562667e7b52c4396bf2d5d1b28/socketio_binary.js — 200 — 21.5 KiB — 36 ms — h2https://colab.research.google.com/static/mathjax/MathJax.js?config=TeX-AMS_HTML-full,Safe&delayStartupUntil=configured/static/mathjax/MathJax.js?config=T... https://colab.research.google.com/static/mathjax/MathJax.js?config=TeX-AMS_HTML-full,Safe&delayStartupUntil=configured — 200 — 19.0 KiB — 104 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
88% of JavaScript execution is third-party
First-party Third-party 2376ms · 2574KB · $32/mo
ssl.gstatic.com
Other
Costly
Execution 1058ms
Transfer 20 KB
Monthly Cost $14/mo
www.gstatic.com
Other
Costly
Execution 467ms
Transfer 0 KB
Unused 49%
Monthly Cost $6/mo
ssl.gstatic.com
Other
Costly
Execution 440ms
Transfer 1569 KB
Unused 57%
Monthly Cost $6/mo
ssl.gstatic.com
Other
Optional
Execution 180ms
Transfer 837 KB
Unused 72%
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 172ms
Transfer 0 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 58ms
Transfer 148 KB
Unused 43%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • ssl.gstatic.com adds 1058ms and costs ~$14/month
  • www.gstatic.com adds 467ms and costs ~$6/month
  • ssl.gstatic.com adds 440ms and costs ~$6/month

88% 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

ssl.gstatic.com takes 1058ms 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

www.gstatic.com takes 467ms 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

ssl.gstatic.com takes 440ms 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

57% of ssl.gstatic.com'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

72% of ssl.gstatic.com'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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