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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
4
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
77
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.
96
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.

779 ms

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

2.62 s

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

206 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.

1.40 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.

4.51 s

Page Load Progression

774 ms
1.5 s
2.3 s
3.1 s
3.9 s
4.6 s
5.4 s
6.2 s
Checks
14
6 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
4.0 MB transferred, 206 requests
FIX
4.0 MB transferred, 206 requests
Critical::
Page weighs 9.4 MB (4.0 MB transferred)
Warning::
JavaScript is 1.9 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.9 MB
Warning::
Images are 1.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.7 MB
Warning::
206 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.83 g CO2 per page load
4.0 MB / 2.4 MB budget
4.0 MB transferred
206 requests
0.83 g CO2 per page load
JavaScript 1.9 MiB 47%
Images 1.7 MiB 44%
Fonts 116.0 KiB 3%
CSS 112.1 KiB 3%
HTML 69.5 KiB 2%
Other 51.7 KiB 1%
Other 4.8 KiB 0%
Other 2.5 KiB 0%
Other 1019 B 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

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

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
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (3.9 MiB of 4.0 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
D
JS Execution Cost
Action
3196ms total JS execution
FIX
3196ms total JS execution
Warning::
https://consumersite-assets.trustpilot.net/consume...: 1130ms CPU time
Warning::
https://simplicity.trustpilot.com/simplicity.js: 794ms CPU time
Warning::
https://www.trustpilot.com/: 390ms CPU time
Warning::
Unattributable: 366ms CPU time
Info::
https://consumersite-assets.trustpilot.net/consume...: 248ms CPU time
Warning::
Third-party scripts: 2807ms (88% of total)

Main Thread Breakdown

Script Evaluation 54% Other 26% Style & Layout 9% Rendering 5% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://consumersite-assets.trustpilot.net/consumersite-home/_next/static/chunks/pages/_app-328c29fda66fef85.js1130ms549ms57ms3rd
https://simplicity.trustpilot.com/simplicity.js794ms769ms1ms3rd
https://www.trustpilot.com/390ms2ms1ms1st
Unattributable366ms22ms0ms3rd
https://consumersite-assets.trustpilot.net/consumersite-home/_next/static/chunks/framework-2b0f46821a51dcef.js248ms181ms4ms3rd
https://a7d575be72e8.edge.sdk.awswaf.com/a7d575be72e8/b5180ee838be/challenge.js216ms157ms45ms3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js52ms31ms19ms3rd
F
JS Bundles
Action
22 scripts, 937 KB unused
FIX
22 scripts, 937 KB unused
Warning::
https://a7d575be72e8.edge.sdk.awswaf.com/a7d575be7...: 264 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 162 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 162 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 162 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consumersite-assets.trustpilot.net/consume...: 94 KB unused (24%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 937 KB
937 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://a7d575be72e8.edge.sdk.awswaf.com/a7d575be72e8/b5180ee838be/challenge.js506 KB264 KB (52%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB162 KB (45%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB162 KB (45%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB162 KB (45%)✓3rd
https://consumersite-assets.trustpilot.net/consumersite-home/_next/static/chunks/pages/_app-328c29fda66fef85.js396 KB94 KB (24%)✓3rd
https://accounts.google.com/gsi/client93 KB69 KB (75%)✓3rd
https://consumersite-assets.trustpilot.net/consumersite-home/_next/static/chunks/7a7f7143.3444e87cee8c05c7.js44 KB24 KB (56%)✓3rd
https://cdn.segment.com/analytics.js/v1/8tb69qtawc/analytics.min.js29 KB—✓3rd
https://consumersite-assets.trustpilot.net/consumersite-home/_next/static/chunks/842.407e9b2e14809b7d.js1 KB—✓3rd
https://consumersite-assets.trustpilot.net/consumersite-home/_next/static/consumersite-home-2.2378.0/_ssgManifest.js1 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

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

C
Image Optimization
Action
159 images, 0 KB saveable
REVIEW
159 images, 0 KB saveable
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.trustpilot.net/brand-assets/4.1.0/star... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.trustpilot.net/brand-assets/4.1.0/star... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.trustpilot.net/brand-assets/4.1.0/star... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.trustpilot.net/brand-assets/4.1.0/star... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.trustpilot.net/brand-assets/4.3.0/logo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.trustpilot.net/brand-assets/4.1.0/star... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.trustpilot.net/brand-assets/4.1.0/star... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://consumersiteimages.trustpilot.net/business... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
159 images 1.7 MB
0 oversized -0 KB
158 legacy format
25 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
3 fonts (116 KB)
PASS
3 fonts (116 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

116 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 779 ms LCP 2.6 shttps://cdn.trustpilot.net/brand-assets/5.3.0/fonts/Trustpilot-Sans.woff2Trustpilot-Sans.woff2 https://cdn.trustpilot.net/brand-assets/5.3.0/fonts/Trustpilot-Sans.woff2 — 47.5 KiB — 0 ms — font-display: swaphttps://cdn.trustpilot.net/brand-assets/5.3.0/fonts/Trustpilot-Display-Extrabold.woff2Trustpilot-Display-Extr... https://cdn.trustpilot.net/brand-assets/5.3.0/fonts/Trustpilot-Display-Extrabold.woff2 — 34.6 KiB — 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: swap
Trustpilot-Sans.woff2 woff2 swap
Size 48 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Trustpilot-Display-Extr... woff2 swap
Size 35 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
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+
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+
HTTP Caching
max-age=1200 (20 minutes)
PASS
max-age=1200 (20 minutes)
Info::
Cache-Control header is set
Got: public, max-age=1200
Info::
Effective TTL: 20 minutes (max-age=1200)
Info::
ETag present — enables conditional (304) responses
Cache-Control

public, max-age=1200

DirectiveValueMeaning
public—Any cache may store this response
max-age1200Cache for 20 minutes
Effective TTL: 1200 seconds
Network Waterfall
206 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
88% of JavaScript execution is third-party
First-party Third-party 2807ms · 962KB · €49/mo
consumersite-assets.trustpilot.net
Other
Costly
Execution 1130ms
Transfer 396 KB
Unused 24%
Monthly Cost €20/mo
simplicity.trustpilot.com
Other
Costly
Execution 794ms
Transfer 15 KB
Monthly Cost €14/mo
Unattributable
Other
Costly
Execution 366ms
Transfer 0 KB
Monthly Cost €6/mo
consumersite-assets.trustpilot.net
Other
Costly
Execution 248ms
Transfer 45 KB
Monthly Cost €4/mo
a7d575be72e8.edge.sdk.awswaf.com
Other
Costly
Execution 216ms
Transfer 506 KB
Unused 52%
Monthly Cost €4/mo
www.gstatic.com
Other
Optional
Execution 52ms
Transfer 0 KB
Unused 45%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • consumersite-assets.trustpilot.net adds 1130ms and costs ~€20/month
  • simplicity.trustpilot.com adds 794ms and costs ~€14/month
  • Unattributable adds 366ms and costs ~€6/month
  • consumersite-assets.trustpilot.net adds 248ms and costs ~€4/month
  • a7d575be72e8.edge.sdk.awswaf.com adds 216ms and costs ~€4/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

consumersite-assets.trustpilot.net takes 1130ms 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

simplicity.trustpilot.com takes 794ms 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

Unattributable takes 366ms 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

consumersite-assets.trustpilot.net takes 248ms 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

a7d575be72e8.edge.sdk.awswaf.com takes 216ms 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

52% of a7d575be72e8.edge.sdk.awswaf.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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