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https://die.net

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
1
REVIEW
1
PASS
11
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.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

515 ms

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

807 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.

0.000

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

515 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.

807 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
11 PASS 1 REVIEW 1 FIX
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 (31.6 KiB of 31.9 KiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
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+
Page Weight Budget
32 KB transferred, 12 requests
PASS
32 KB transferred, 12 requests
Info::
Page weighs 80 KB (32 KB transferred)
Info::
12 HTTP requests
Info::
Estimated 0.01 g CO2 per page load
32 KB / 2.4 MB budget
32 KB transferred
12 requests
0.01 g CO2 per page load
JavaScript 23.4 KiB 74%
CSS 4.0 KiB 13%
HTML 2.3 KiB 7%
Other 1.3 KiB 4%
Other 848 B 3%
Images 0 B 0%
Other 0 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+
Image Optimization
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Info::
All images are well-optimized
2 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
151ms total JS execution
PASS
151ms total JS execution
Info::
https://www.die.net/cdn-cgi/challenge-platform/scr...: 97ms CPU time
Info::
https://www.die.net/: 54ms CPU time
Warning::
Third-party scripts: 151ms (100% of total)

Main Thread Breakdown

Script Evaluation 61% Other 22% Style & Layout 12%
ScriptTotalScriptingParse/CompileParty
https://www.die.net/cdn-cgi/challenge-platform/scripts/jsd/main.js97ms93ms1ms3rd
https://www.die.net/54ms18ms1ms3rd
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
2 scripts, 0 KB unused
PASS
2 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.cloudflareinsights.com/beacon.min.js11 KB—✓3rd
https://www.die.net/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?13 KB—✓3rd
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
12 resources · 32 KB · 0 KB savings available
PASS
12 resources · 32 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 32 KB
Warning::
11 third-party resources (99% of weight)
12 resources · 31.9 KiB · 11 third-party Within 1MB page-weight target
JavaScript 74% · 23.4 KiB
CSS 13% · 4.0 KiB
Document 7% · 2.3 KiB
Other 4% · 1.3 KiB
Image 2% · 807 B
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
12 requests over 259ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 515 ms LCP 807 mshttps://die.net// https://die.net/ — 301 — 323 B — 18 ms — h3https://www.die.net/www.die.net/ https://www.die.net/ — 200 — 2.3 KiB — 20 ms — h3https://www.die.net/style/die.csswww.die.net/style/die.css https://www.die.net/style/die.css — 200 — 4.0 KiB — 14 ms — h3https://static.cloudflareinsights.com/beacon.min.jsstatic.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js — 200 — 10.7 KiB — 27 ms — h2data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="120" height="85"><path fill="%231…www.w3.org/2000/svg" width="120" he... data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="120" height="85"><path fill="%231… — 200 — 0 B — 0 ms — datadata:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="120" height="35"><path fill="%23f…www.w3.org/2000/svg" width="120" he... data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="120" height="35"><path fill="%23f… — 200 — 0 B — 0 ms — datahttps://www.die.net/cdn-cgi/challenge-platform/scripts/jsd/main.jswww.die.net/cdn-cgi/challenge-platf... https://www.die.net/cdn-cgi/challenge-platform/scripts/jsd/main.js — 302 — 204 B — 9 ms — h3https://cloudflareinsights.com/cdn-cgi/rumcloudflareinsights.com/cdn-cgi/rum https://cloudflareinsights.com/cdn-cgi/rum — 200 — 0 B — 22 ms — h2https://www.die.net/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?www.die.net/cdn-cgi/challenge-platf... https://www.die.net/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js? — 200 — 12.7 KiB — 16 ms — h3https://www.die.net/favicon.icowww.die.net/favicon.ico https://www.die.net/favicon.ico — 200 — 807 B — 17 ms — h3https://cloudflareinsights.com/cdn-cgi/rumcloudflareinsights.com/cdn-cgi/rum https://cloudflareinsights.com/cdn-cgi/rum — 204 — 35 B — 5 ms — h2https://www.die.net/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.4714978936070089:1776812996:j8uynlWDUR8SlXiUuV7-tPLZmgWc__KphGQZxjzECIs/9f005b5849699cd3www.die.net/cdn-cgi/challenge-platf... https://www.die.net/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.4714978936070089:1776812996:j8uynlWDUR8SlXiUuV7-tPLZmgWc__KphGQZxjzECIs/9f005b5849699cd3 — 200 — 813 B — 8 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 151ms · 2KB · $2/mo
www.die.net
Other
Optional
Execution 97ms
Transfer 0 KB
Monthly Cost $1/mo
www.die.net
Other
Optional
Execution 54ms
Transfer 2 KB
Monthly Cost $1/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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