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https://curl.se

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
96
GRADE
A
FIX
0
REVIEW
1
PASS
12
INFO
2

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
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.
75
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.

355 ms

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

385 ms

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

0 ms

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

0.006

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

624 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

385 ms

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
12 PASS 1 REVIEW
C
Image Optimization
Action
11 images, 0 KB saveable
REVIEW
11 images, 0 KB saveable
Warning::
https://curl.se/logo/curl-white-symbol.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/logo/curl-30-years.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/pix/haxx.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/pix/everything-curl.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/pix/cash.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/pix/mastering.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/pix/wolfssl.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/pix/fastly.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/pix/top/github.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/pix/teamviewer.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://curl.se/pix/user.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
11 images 80 KB
0 oversized -0 KB
11 legacy format
11 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

A+
Page Weight Budget
92 KB transferred, 15 requests
PASS
92 KB transferred, 15 requests
Info::
Page weighs 135 KB (92 KB transferred)
Info::
15 HTTP requests
Info::
Estimated 0.02 g CO2 per page load
92 KB / 2.4 MB budget
92 KB transferred
15 requests
0.02 g CO2 per page load
Images 79.9 KiB 87%
HTML 4.6 KiB 5%
Other 3.6 KiB 4%
CSS 3.5 KiB 4%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
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+
JS Execution Cost
53ms total JS execution
PASS
53ms total JS execution
Info::
Unattributable: 53ms CPU time
Warning::
Third-party scripts: 53ms (100% of total)

Main Thread Breakdown

Other 68% Style & Layout 19% Rendering 5% Script Evaluation 4% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
Unattributable53ms2ms0ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
No JavaScript
PASS
No JavaScript
Info::
No JavaScript bundles
No JavaScript files loaded.
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+
Page Weight Inventory
15 resources · 92 KB · 0 KB savings available
PASS
15 resources · 92 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 92 KB
15 resources · 91.7 KiB · 0 third-party Within 1MB page-weight target
Image 91% · 83.5 KiB
Document 5% · 4.6 KiB
CSS 4% · 3.5 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Axis12 Ltd

A+
HTTP Caching
max-age=60 (1 minute)
PASS
max-age=60 (1 minute)
Info::
Cache-Control header is set
Got: max-age=60
Info::
Effective TTL: 1 minute (max-age=60)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

max-age=60

DirectiveValueMeaning
max-age60Cache for 1 minute
Effective TTL: 60 seconds
Network Waterfall
15 requests over 1053ms
INFO
0 ms 500 ms 1.0 s FCP 355 ms LCP 385 mshttps://curl.se// https://curl.se/ — 200 — 4.6 KiB — 418 ms — h2https://curl.se/curl.css/curl.css https://curl.se/curl.css — 200 — 3.5 KiB — 290 ms — h2https://curl.se/logo/curl-white-symbol.svg/logo/curl-white-symbol.svg https://curl.se/logo/curl-white-symbol.svg — 200 — 544 B — 142 ms — h2https://curl.se/logo/curl-30-years.svg/logo/curl-30-years.svg https://curl.se/logo/curl-30-years.svg — 200 — 2.0 KiB — 141 ms — h2https://curl.se/pix/haxx.svg/pix/haxx.svg https://curl.se/pix/haxx.svg — 200 — 1.2 KiB — 143 ms — h2https://curl.se/pix/wolfssl.svg/pix/wolfssl.svg https://curl.se/pix/wolfssl.svg — 200 — 3.0 KiB — 148 ms — h2https://curl.se/pix/fastly.svg/pix/fastly.svg https://curl.se/pix/fastly.svg — 200 — 1.7 KiB — 284 ms — h2https://curl.se/pix/top/github.svg/pix/top/github.svg https://curl.se/pix/top/github.svg — 200 — 1.6 KiB — 288 ms — h2https://curl.se/pix/teamviewer.svg/pix/teamviewer.svg https://curl.se/pix/teamviewer.svg — 200 — 4.1 KiB — 288 ms — h2https://curl.se/pix/user.svg/pix/user.svg https://curl.se/pix/user.svg — 200 — 1.1 KiB — 149 ms — h2https://curl.se/pix/everything-curl.jpg/pix/everything-curl.jpg https://curl.se/pix/everything-curl.jpg — 200 — 34.8 KiB — 294 ms — h2https://curl.se/pix/cash.svg/pix/cash.svg https://curl.se/pix/cash.svg — 200 — 1.3 KiB — 294 ms — h2https://curl.se/pix/mastering.jpg/pix/mastering.jpg https://curl.se/pix/mastering.jpg — 200 — 28.5 KiB — 326 ms — h2https://curl.se/logo/curl-symbol.svg/logo/curl-symbol.svg https://curl.se/logo/curl-symbol.svg — 200 — 727 B — 137 ms — h3https://curl.se/favicon.ico/favicon.ico https://curl.se/favicon.ico — 200 — 2.9 KiB — 136 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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 53ms · 0KB · kr6/mo
Unattributable
Other
Optional
Execution 53ms
Transfer 0 KB
Monthly Cost kr6/mo

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

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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