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https://www.revolut.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
4
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
37
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
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.

699 ms

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

8.18 s

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

2.02 s

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

0.084

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

2.52 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.

8.54 s

Page Load Progression

415 ms
830 ms
1.2 s
1.7 s
2.1 s
2.5 s
2.9 s
3.3 s
Checks
14
6 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
13.6 MB transferred, 114 requests
FIX
13.6 MB transferred, 114 requests
Critical::
Page weighs 18.6 MB (13.6 MB transferred)
Warning::
Images are 11.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 11.7 MB
Warning::
JavaScript is 1.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.0 MB
Info::
Fonts are 596 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 596 KB
Warning::
114 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.9 g CO2 per page load
13.6 MB / 2.4 MB budget
13.6 MB transferred
114 requests
2.9 g CO2 per page load
Images 11.7 MiB 86%
JavaScript 1.0 MiB 8%
Fonts 596.2 KiB 4%
Other 246.3 KiB 2%
HTML 53.9 KiB 0%
CSS 10.4 KiB 0%
Other 999 B 0%
Other 916 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

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
95% third-party, 0 ms blocking
FIX
95% third-party, 0 ms blocking
Warning::
Third-party code accounts for 95% of page weight (12.9 MiB of 13.6 MiB)
Info::
Third-party blocking time is low (0 ms)
95%
First-party Third-party
D
JS Execution Cost
Action
3029ms total JS execution
FIX
3029ms total JS execution
Warning::
https://www.revolut.com/_next/static/chunks/pages/...: 2074ms CPU time
Warning::
https://www.revolut.com/_next/static/chunks/framew...: 458ms CPU time
Info::
Unattributable: 241ms CPU time
Info::
https://www.revolut.com/: 138ms CPU time
Info::
https://growth-performance.revolut.com/gtag/js?id=...: 118ms CPU time
Info::
Third-party scripts: 359ms (12% of total)

Main Thread Breakdown

Other 68% Script Evaluation 22% Style & Layout 5%
ScriptTotalScriptingParse/CompileParty
https://www.revolut.com/_next/static/chunks/pages/_app-e5f1c28b31e4c8c4.js2074ms98ms22ms1st
https://www.revolut.com/_next/static/chunks/framework-b45be8d4b3ddd3ed.js458ms379ms3ms1st
Unattributable241ms4ms0ms3rd
https://www.revolut.com/138ms3ms0ms1st
https://growth-performance.revolut.com/gtag/js?id=G-NC0XSL7JGN118ms103ms12ms3rd
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
max-age0Cache for 0 seconds
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
post-check0
pre-check0
B
Image Optimization
29 images, 0 KB saveable
REVIEW
29 images, 0 KB saveable
Info::
All images are well-optimized
29 images 11.7 MB
0 oversized -0 KB
27 legacy format
0 missing dimensions CLS risk
C
JS Bundles
Action
57 scripts, 207 KB unused
REVIEW
57 scripts, 207 KB unused
Warning::
https://growth-performance.revolut.com/gtag/js?id=...: 75 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.revolut.com/_next/static/chunks/pages/...: 67 KB unused (28%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://growth-performance.revolut.com/gtag/js?id=...: 65 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 207 KB
207 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://growth-performance.revolut.com/gtag/js?id=G-3Q2GNB8G11191 KB75 KB (39%)✓3rd
https://www.revolut.com/_next/static/chunks/pages/_app-e5f1c28b31e4c8c4.js242 KB67 KB (28%)✓1st
https://growth-performance.revolut.com/gtag/js?id=G-NC0XSL7JGN198 KB65 KB (33%)✓3rd
https://polyfills.revolut.com/v3/polyfill.min.js?features=Array.prototype.at%2CPromise.allSettled%2CIntl.getCanonicalLocales%2CIntl.Locale%2CIntl.PluralRules%2CIntl.PluralRules.~locale.en%2CIntl.NumberFormat%2CIntl.NumberFormat.~locale.en%2CIntl.DisplayNames%2CIntl.DisplayNames.~locale.en%2CIntl.DateTimeFormat%2CIntl.DateTimeFormat.~locale.en%2CIntl.DateTimeFormat.prototype.formatToParts&flags=gated1 KB—✓3rd
https://www.revolut.com/_next/static/chunks/9402-b6f441d1afff4a1a.js5 KB—✓1st
https://www.revolut.com/_next/static/chunks/7863.f581fcdd602f3d4e.js4 KB—✓1st
https://www.revolut.com/_next/static/chunks/7000.a53e7f0eb7d057ec.js9 KB—✓1st
https://www.revolut.com/_next/static/chunks/7298.e07f68ebf65905be.js3 KB—✓1st
https://www.revolut.com/_next/static/chunks/7589.323195937cd057e0.js3 KB—✓1st
https://www.revolut.com/_next/static/chunks/6832.f9db9d6e1800b0f4.js14 KB—✓1st

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 (596 KB)
PASS
8 fonts (596 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

596 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 699 ms LCP 8.2 shttps://assets.revolut.com/assets/fonts/AeonikPro-Black.woff2AeonikPro-Black.woff2 https://assets.revolut.com/assets/fonts/AeonikPro-Black.woff2 — 53.9 KiB — 0 ms — font-display: swaphttps://assets.revolut.com/assets/fonts/AeonikPro-Medium.woff2AeonikPro-Medium.woff2 https://assets.revolut.com/assets/fonts/AeonikPro-Medium.woff2 — 40.3 KiB — 0 ms — font-display: swaphttps://assets.revolut.com/assets/fonts/AeonikPro-Regular.woff2AeonikPro-Regular.woff2 https://assets.revolut.com/assets/fonts/AeonikPro-Regular.woff2 — 53.3 KiB — 0 ms — font-display: swaphttps://assets.revolut.com/assets/fonts/AeonikPro-Black-Capitalised.woff2AeonikPro-Black-Capital... https://assets.revolut.com/assets/fonts/AeonikPro-Black-Capitalised.woff2 — 23.9 KiB — 0 ms — font-display: swaphttps://assets.revolut.com/assets/fonts/Inter-Regular.woff2Inter-Regular.woff2 https://assets.revolut.com/assets/fonts/Inter-Regular.woff2 — 101.3 KiB — 0 ms — font-display: swaphttps://assets.revolut.com/assets/fonts/Inter-Medium.woff2Inter-Medium.woff2 https://assets.revolut.com/assets/fonts/Inter-Medium.woff2 — 109.2 KiB — 0 ms — font-display: swaphttps://assets.revolut.com/assets/fonts/Inter-SemiBold.woff2Inter-SemiBold.woff2 https://assets.revolut.com/assets/fonts/Inter-SemiBold.woff2 — 109.7 KiB — 0 ms — font-display: swaphttps://assets.revolut.com/assets/fonts/Inter-Bold.woff2Inter-Bold.woff2 https://assets.revolut.com/assets/fonts/Inter-Bold.woff2 — 104.6 KiB — 0 ms — font-display: swap
AeonikPro-Black.woff2 woff2 swap
Size 54 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
AeonikPro-Medium.woff2 woff2 swap
Size 40 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
AeonikPro-Regular.woff2 woff2 swap
Size 53 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
AeonikPro-Black-Capital... woff2 swap
Size 24 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Inter-Regular.woff2 woff2 swap
Size 101 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
Inter-Medium.woff2 woff2 swap
Size 109 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
Inter-SemiBold.woff2 woff2 swap
Size 110 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
Inter-Bold.woff2 woff2 swap
Size 105 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
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 ~212 KB and ~424 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: Cloudflare

Network Waterfall
114 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
12% of JavaScript execution is third-party
First-party Third-party 359ms · 198KB · £4/mo
Unattributable
Other
Costly
Execution 241ms
Transfer 0 KB
Monthly Cost £2/mo
growth-performance.revolut.com
Other
Optional
Execution 118ms
Transfer 198 KB
Unused 33%
Monthly Cost £1/mo

These scripts may cost more than they're worth

  • Unattributable adds 241ms and costs ~£2/month

Unattributable takes 241ms 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

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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