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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
1
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
90
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
94
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.
85
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.

1.11 s

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.

13 ms

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

0.009

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

1.88 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.

1.51 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
14
7 PASS 4 REVIEW 1 FIX
D
Third-Party Impact
Action
90% third-party, 0 ms blocking
FIX
90% third-party, 0 ms blocking
Warning::
Third-party code accounts for 90% of page weight (656.1 KiB of 727.3 KiB)
Info::
Third-party blocking time is low (0 ms)
90%
First-party Third-party
C
Image Optimization
Action
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Warning::
https://images.ctfassets.net/il1yandlcjgk/WnWnzSKC... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/il1yandlcjgk/tFyqwtmJ... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/il1yandlcjgk/1X14DUE0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/il1yandlcjgk/4yGFwJuI... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/il1yandlcjgk/2aE0xBVv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
42 images 159 KB
0 oversized -0 KB
4 legacy format
5 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

B
JS Execution Cost
691ms total JS execution
REVIEW
691ms total JS execution
Warning::
https://circleci.com/: 363ms CPU time
Info::
https://consent.cookiebot.com/uc.js: 191ms CPU time
Info::
Unattributable: 137ms CPU time
Info::
Third-party scripts: 328ms (47% of total)

Main Thread Breakdown

Style & Layout 30% Other 23% Script Evaluation 23% Parse HTML & CSS 15% Rendering 5% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://circleci.com/363ms7ms1ms1st
https://consent.cookiebot.com/uc.js191ms119ms4ms3rd
Unattributable137ms2ms0ms3rd
C
JS Bundles
Action
16 scripts, 157 KB unused
REVIEW
16 scripts, 157 KB unused
Warning::
https://d2qm0z2kzhiwa.cloudfront.net/assets/node_m...: 98 KB unused (81%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.cookiebot.com/a28b71f3-4d2e-4eac-9...: 36 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.cookiebot.com/uc.js: 23 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 157 KB
157 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://d2qm0z2kzhiwa.cloudfront.net/assets/node_modules/instantsearch.js/dist/instantsearch.production.min-37eaed0bfb241a0a27b6c722f05bc9c4.js122 KB98 KB (81%)✓3rd
https://consent.cookiebot.com/a28b71f3-4d2e-4eac-93bc-34929948dd7d/cc.js?renew=false&referer=circleci.com&dnt=false&init=false99 KB36 KB (36%)✓3rd
https://consent.cookiebot.com/uc.js36 KB23 KB (64%)✓3rd
https://d2qm0z2kzhiwa.cloudfront.net/assets/morph/resources-pagination-6d54210e3b3db7177dd2070467213604.js1 KB—✓3rd
https://d2qm0z2kzhiwa.cloudfront.net/assets/morph/outgoing-links-83e339ba02562617cce572ec84dfba8e.js1 KB—✓3rd
https://d2qm0z2kzhiwa.cloudfront.net/assets/morph/track-events-ac9fc4fdbc538549b9a206cee2c9558b.js2 KB—✓3rd
https://d2qm0z2kzhiwa.cloudfront.net/assets/morph/track-scroll-a10c8de4ab605a32dcf28632af5a9f13.js1 KB—✓3rd
https://d2qm0z2kzhiwa.cloudfront.net/assets/morph/track_body-links-b146eb085b5c35b87d26475d81cec45a.js1 KB—✓3rd
https://d2qm0z2kzhiwa.cloudfront.net/assets/morph/nav_mobile-menu-75129e092cc37ba3ad7687e68a97e2b1.js1 KB—✓3rd
https://d2qm0z2kzhiwa.cloudfront.net/assets/morph/video-dialog-65d77cf08e5dab8eafe955d25258f6f0.js2 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

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

Green Hosting

No green hosting detected

A
Page Weight Budget
727 KB transferred, 71 requests
PASS
727 KB transferred, 71 requests
Info::
Page weighs 2.2 MB (727 KB transferred)
Info::
71 HTTP requests
Info::
Estimated 0.15 g CO2 per page load
727 KB / 2.4 MB budget
727 KB transferred
71 requests
0.15 g CO2 per page load
JavaScript 278.5 KiB 38%
Images 159.1 KiB 22%
Fonts 152.5 KiB 21%
HTML 70.3 KiB 10%
CSS 41.6 KiB 6%
Other 22.8 KiB 3%
Other 1.2 KiB 0%
Other 949 B 0%
Other 528 B 0%
0 2.4 MB 4.9 MB
Under budget
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 (152 KB)
PASS
3 fonts (152 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

152 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 FCP 1.1 s LCP 1.5 shttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 47.3 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2V8mDoQDjQSkFtoMM3T6r8E7... https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2 — 21.8 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa25L7W0Q5n-wU.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa25L7W0Q5n-wU.woff2 — 83.3 KiB — 0 ms — font-display: swap
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 47 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
V8mDoQDjQSkFtoMM3T6r8E7... woff2 swap
Size 22 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 83 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=10 (10 seconds)
PASS
max-age=10 (10 seconds)
Info::
Cache-Control header is set
Got: private,max-age=10
Info::
Effective TTL: 10 seconds (max-age=10)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

private,max-age=10

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
max-age10Cache for 10 seconds
Effective TTL: 10 seconds
Network Waterfall
71 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
47% of JavaScript execution is third-party
First-party Third-party 328ms · 36KB · €6/mo
consent.cookiebot.com
Other
Optional
Execution 191ms
Transfer 36 KB
Unused 64%
Monthly Cost €3/mo
Unattributable
Other
Optional
Execution 137ms
Transfer 0 KB
Monthly Cost €2/mo

47% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

64% of consent.cookiebot.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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