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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
91
GRADE
A
FIX
2
REVIEW
1
PASS
12
INFO
2

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

Mobile Desktop
96
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
75
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.

1.97 s

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

2.52 s

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.

1.97 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.

2.53 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
17
12 PASS 1 REVIEW 2 FIX
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 (150.8 KiB of 151.2 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
16 images, 0 KB saveable
REVIEW
16 images, 0 KB saveable
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
16 images 72 KB
0 oversized -0 KB
15 legacy format
9 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

A+
Page Weight Budget
151 KB transferred, 26 requests
PASS
151 KB transferred, 26 requests
Info::
Page weighs 359 KB (151 KB transferred)
Info::
26 HTTP requests
Info::
Estimated 0.03 g CO2 per page load
151 KB / 2.4 MB budget
151 KB transferred
26 requests
0.03 g CO2 per page load
Images 71.9 KiB 48%
JavaScript 49.6 KiB 33%
CSS 21.9 KiB 14%
HTML 6.8 KiB 5%
Other 1.0 KiB 1%
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+
JS Execution Cost
404ms total JS execution
PASS
404ms total JS execution
Info::
https://www.ispconfig.org/: 174ms CPU time
Info::
Unattributable: 157ms CPU time
Info::
https://www.ispconfig.org/wp-content/themes/ispcon...: 74ms CPU time
Warning::
Third-party scripts: 404ms (100% of total)

Main Thread Breakdown

Other 38% Style & Layout 25% Script Evaluation 22% Parse HTML & CSS 7% Rendering 5% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://www.ispconfig.org/174ms3ms1ms3rd
Unattributable157ms6ms0ms3rd
https://www.ispconfig.org/wp-content/themes/ispconfig/js/jquery.min.js74ms55ms8ms3rd
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
5 scripts, 22 KB unused
PASS
5 scripts, 22 KB unused
Warning::
https://www.ispconfig.org/wp-content/themes/ispcon...: 22 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 22 KB
22 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.ispconfig.org/wp-content/themes/ispconfig/js/jquery.min.js34 KB22 KB (65%)✓3rd
https://www.ispconfig.org/wp-content/themes/ispconfig/js/bootstrap.min.js9 KB—✓3rd
https://www.ispconfig.org/wp-content/themes/ispconfig/js/site.js1 KB—✓3rd
blob:https://www.ispconfig.org/3758c9e4-30af-4941-baba-531a5500988f-0 KB—✓3rd
https://www.ispconfig.org/wp-includes/js/wp-emoji-release.min.js?ver=6.9.46 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

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
26 resources · 151 KB · 22 KB savings available
PASS
26 resources · 151 KB · 22 KB savings available
Info::
Within 1MB page-weight target
Got: 151 KB
Warning::
25 third-party resources (100% of weight)
26 resources · 151.2 KiB · 25 third-party Within 1MB page-weight target
Image 48% · 72.5 KiB
JavaScript 33% · 49.6 KiB
CSS 14% · 21.9 KiB
Document 5% · 7.3 KiB

~21.9 KiB of savings available

Remove unused JavaScript: 21.9 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
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
26 requests over 568ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.0 s LCP 2.5 shttps://ispconfig.org// https://ispconfig.org/ — 301 — 431 B — 171 ms — h2https://www.ispconfig.org/www.ispconfig.org/ https://www.ispconfig.org/ — 200 — 6.8 KiB — 160 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/css/bootstrap.csswww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/css/bootstrap.css — 200 — 18.7 KiB — 47 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/style.csswww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/style.css — 200 — 3.1 KiB — 41 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/ispconfig_logo.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/ispconfig_logo.png — 200 — 1.6 KiB — 35 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/ispconfig_index_screenshot33.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/ispconfig_index_screenshot33.png — 200 — 21.5 KiB — 30 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_server_stack.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_server_stack.png — 200 — 10.4 KiB — 34 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_world.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_world.png — 200 — 5.9 KiB — 41 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/js/jquery.min.jswww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/js/jquery.min.js — 200 — 34.2 KiB — 43 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_robot.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_robot.png — 200 — 5.1 KiB — 40 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/js/bootstrap.min.jswww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/js/bootstrap.min.js — 200 — 9.0 KiB — 36 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/js/site.jswww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/js/site.js — 200 — 895 B — 32 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_penguin.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_penguin.png — 200 — 4.4 KiB — 29 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_keys.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_keys.png — 200 — 8.1 KiB — 34 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_gear.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/icon_gear.png — 200 — 7.0 KiB — 31 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgAQMAAABJtOi3AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJb…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgAQMAAABJtOi3AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJb… — 200 — 0 B — 0 ms — datahttps://www.ispconfig.org/wp-content/themes/ispconfig/images/footer_box_line.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/footer_box_line.png — 200 — 570 B — 33 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/isp_icon_footer.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/isp_icon_footer.png — 200 — 2.3 KiB — 30 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/nav_line.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/nav_line.png — 200 — 620 B — 31 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/bg_light_grey.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/bg_light_grey.png — 200 — 1.1 KiB — 33 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/check_red.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/check_red.png — 200 — 728 B — 40 ms — h2https://www.ispconfig.org/wp-content/themes/ispconfig/images/bg_medium_grey.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/bg_medium_grey.png — 200 — 1.3 KiB — 35 ms — h2blob:https://www.ispconfig.org/3758c9e4-30af-4941-baba-531a5500988fwww.ispconfig.org/3758c9e4-30af-494... blob:https://www.ispconfig.org/3758c9e4-30af-4941-baba-531a5500988f — 200 — -1 B — 40 ms — blobhttps://www.ispconfig.org/wp-content/themes/ispconfig/images/bg_dark_grey.pngwww.ispconfig.org/wp-content/themes... https://www.ispconfig.org/wp-content/themes/ispconfig/images/bg_dark_grey.png — 200 — 1.4 KiB — 31 ms — h2https://www.ispconfig.org/wp-includes/js/wp-emoji-release.min.js?ver=6.9.4www.ispconfig.org/wp-includes/js/wp... https://www.ispconfig.org/wp-includes/js/wp-emoji-release.min.js?ver=6.9.4 — 200 — 5.5 KiB — 28 ms — h2https://www.ispconfig.org/favicon.icowww.ispconfig.org/favicon.ico https://www.ispconfig.org/favicon.ico — 200 — 627 B — 30 ms — h2
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 404ms · 41KB · €4/mo
www.ispconfig.org
Other
Optional
Execution 174ms
Transfer 7 KB
Monthly Cost €2/mo
Unattributable
Other
Optional
Execution 157ms
Transfer 0 KB
Monthly Cost €2/mo
www.ispconfig.org
Other
Optional
Execution 74ms
Transfer 34 KB
Unused 65%
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

65% of www.ispconfig.org'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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