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https://huel.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
3
REVIEW
4
PASS
5
INFO
2

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

Mobile Desktop
76
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
82
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.

1.01 s

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

1.98 s

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

207 ms

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

0.000

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

2.63 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.

3.34 s

Page Load Progression

578 ms
1.2 s
1.7 s
2.3 s
2.9 s
3.5 s
4.0 s
4.6 s
Checks
14
5 PASS 4 REVIEW 3 FIX
D
Page Weight Budget
Action
2.5 MB transferred, 136 requests
FIX
2.5 MB transferred, 136 requests
Warning::
Page weighs 7.8 MB (2.5 MB transferred)
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Warning::
136 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.52 g CO2 per page load
2.5 MB / 2.4 MB budget
2.5 MB transferred
136 requests
0.52 g CO2 per page load
JavaScript 1.2 MiB 50%
Images 851.5 KiB 33%
HTML 157.9 KiB 6%
CSS 121.6 KiB 5%
Fonts 94.7 KiB 4%
Other 48.0 KiB 2%
Other 6.0 KiB 0%
Other 3.2 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

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 (2.5 MiB of 2.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
42 scripts, 512 KB unused
FIX
42 scripts, 512 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 246 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://eu.huel.com/_next/static/chunks/7073-b1848...: 80 KB unused (92%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn-ukwest.onetrust.com/scripttemplates/20...: 69 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-N5X...: 58 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://eu.huel.com/_next/static/chunks/8333-4a681...: 37 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 512 KB
512 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB246 KB (68%)✓3rd
https://eu.huel.com/_next/static/chunks/7073-b1848751c7863df4.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY88 KB80 KB (92%)✓3rd
https://cdn-ukwest.onetrust.com/scripttemplates/202602.1.0/otBannerSdk.js129 KB69 KB (53%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N5XRP5G159 KB58 KB (49%)✓3rd
https://eu.huel.com/_next/static/chunks/8333-4a68189ea0c00623.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY54 KB37 KB (69%)✓3rd
https://eu.huel.com/_next/static/chunks/7671-9d01723b2785ad84.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY33 KB22 KB (67%)✓3rd
https://eu.huel.com/_next/static/chunks/3714-c7cf45c1c0c6adca.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY21 KB—✓3rd
https://eu.huel.com/_next/static/chunks/app/%5Blocale%5D/%5BflagsCode%5D/(purchase-flow)/(footer)/layout-eacce1d5838a407a.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY7 KB—✓3rd
https://eu.huel.com/_next/static/chunks/6992-d11981dd663df212.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY45 KB—✓3rd
https://eu.huel.com/_next/static/chunks/3651-304c9bd9c45e507e.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY10 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

B
Image Optimization
40 images, 0 KB saveable
REVIEW
40 images, 0 KB saveable
Info::
All images are well-optimized
40 images 852 KB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1798ms total JS execution
REVIEW
1798ms total JS execution
Warning::
https://eu.huel.com/nl-nl: 516ms CPU time
Warning::
Unattributable: 321ms CPU time
Info::
https://eu.huel.com/_next/static/chunks/2783-87ac4...: 221ms CPU time
Info::
https://eu.huel.com/_next/static/chunks/webpack-b6...: 207ms CPU time
Info::
https://eu.huel.com/_next/static/chunks/428afff4-8...: 175ms CPU time
Warning::
Third-party scripts: 1798ms (100% of total)

Main Thread Breakdown

Script Evaluation 44% Other 22% Script Parsing & Compilation 16% Style & Layout 9% Parse HTML & CSS 7%
ScriptTotalScriptingParse/CompileParty
https://eu.huel.com/nl-nl516ms86ms103ms3rd
Unattributable321ms37ms0ms3rd
https://eu.huel.com/_next/static/chunks/2783-87ac4237bf302d3a.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY221ms191ms13ms3rd
https://eu.huel.com/_next/static/chunks/webpack-b67bef929ed216b1.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY207ms206ms1ms3rd
https://eu.huel.com/_next/static/chunks/428afff4-8ae13ecf44823369.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY175ms121ms15ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N5XRP5G109ms79ms20ms3rd
https://cdn-ukwest.onetrust.com/scripttemplates/202602.1.0/otBannerSdk.js109ms67ms21ms3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js80ms41ms39ms3rd
https://eu.huel.com/_next/static/chunks/12336b57-dce2e75bee5c3a0e.js?dpl=dpl_8grWcvQdCHJbbjYRZQ7x9fwKhwzY62ms10ms4ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
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+
Font Loading
6 fonts (95 KB)
PASS
6 fonts (95 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

95 KB total

Render-blocking

0

of 6

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 FCP 1.0 s LCP 2.0 shttps://eu.huel.com/_next/static/media/2d596a6f791bf7c0-s.p.woff22d596a6f791bf7c0-s.p.woff2 https://eu.huel.com/_next/static/media/2d596a6f791bf7c0-s.p.woff2 — 19.4 KiB — 0 ms — font-display: swaphttps://eu.huel.com/_next/static/media/6d5bf4d41e75582c-s.p.woff26d5bf4d41e75582c-s.p.woff2 https://eu.huel.com/_next/static/media/6d5bf4d41e75582c-s.p.woff2 — 21.0 KiB — 0 ms — font-display: swaphttps://eu.huel.com/_next/static/media/91c7df61321e4fae-s.p.woff291c7df61321e4fae-s.p.woff2 https://eu.huel.com/_next/static/media/91c7df61321e4fae-s.p.woff2 — 12.5 KiB — 0 ms — font-display: swaphttps://eu.huel.com/_next/static/media/a6542ebde78961d1-s.p.woff2a6542ebde78961d1-s.p.woff2 https://eu.huel.com/_next/static/media/a6542ebde78961d1-s.p.woff2 — 13.0 KiB — 0 ms — font-display: swaphttps://eu.huel.com/_next/static/media/c4e903414b0c45fe-s.p.woff2c4e903414b0c45fe-s.p.woff2 https://eu.huel.com/_next/static/media/c4e903414b0c45fe-s.p.woff2 — 8.1 KiB — 0 ms — font-display: swaphttps://eu.huel.com/_next/static/media/eeedaeaf2fd9e2a5-s.p.woff2eeedaeaf2fd9e2a5-s.p.woff2 https://eu.huel.com/_next/static/media/eeedaeaf2fd9e2a5-s.p.woff2 — 20.9 KiB — 0 ms — font-display: swap
2d596a6f791bf7c0-s.p.woff2 woff2 swap
Size 19 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
6d5bf4d41e75582c-s.p.woff2 woff2 swap
Size 21 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
91c7df61321e4fae-s.p.woff2 woff2 swap
Size 12 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
a6542ebde78961d1-s.p.woff2 woff2 swap
Size 13 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
c4e903414b0c45fe-s.p.woff2 woff2 swap
Size 8 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
eeedaeaf2fd9e2a5-s.p.woff2 woff2 swap
Size 21 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
Network Waterfall
136 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 1798ms · 935KB · €10/mo
eu.huel.com
Other
Costly
Execution 516ms
Transfer 158 KB
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 321ms
Transfer 0 KB
Monthly Cost €2/mo
eu.huel.com
Other
Costly
Execution 221ms
Transfer 45 KB
Monthly Cost €1/mo
eu.huel.com
Other
Costly
Execution 207ms
Transfer 5 KB
Monthly Cost €1/mo
eu.huel.com
Other
Optional
Execution 175ms
Transfer 54 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 109ms
Transfer 159 KB
Unused 49%
Monthly Cost €1/mo
cdn-ukwest.onetrust.com
Other
Optional
Execution 109ms
Transfer 129 KB
Unused 53%
Monthly Cost €1/mo
www.gstatic.com
Other
Optional
Execution 80ms
Transfer 363 KB
Unused 68%
Monthly Cost €0/mo
eu.huel.com
Other
Optional
Execution 62ms
Transfer 21 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • eu.huel.com adds 516ms and costs ~€3/month
  • Unattributable adds 321ms and costs ~€2/month
  • eu.huel.com adds 221ms and costs ~€1/month
  • eu.huel.com adds 207ms and costs ~€1/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

eu.huel.com takes 516ms 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 321ms 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

eu.huel.com takes 221ms 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

eu.huel.com takes 207ms 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

53% of cdn-ukwest.onetrust.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

68% of www.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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