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https://nabble.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
0
REVIEW
4
PASS
9
INFO
1

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.
97
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.
100
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.

1.31 s

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

1.31 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.

0.098

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

1.31 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.

1.31 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
9 PASS 4 REVIEW
B
Third-Party Impact
57% third-party, 0 ms blocking
REVIEW
57% third-party, 0 ms blocking
Warning::
Third-party code accounts for 57% of page weight (199.0 KiB of 347.6 KiB)
Info::
Third-party blocking time is low (0 ms)
43%
57%
First-party Third-party
B
JS Bundles
2 scripts, 64 KB unused
REVIEW
2 scripts, 64 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-GRXY...: 64 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 64 KB
64 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-GRXYWF4WWB&cx=c&_slc=1147 KB64 KB (44%)✓3rd
https://www.google-analytics.com/analytics.js21 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

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

Green Hosting

No green hosting detected

B
HTTP Caching
max-age=0
REVIEW
max-age=0
Info::
Cache-Control header is set
Got: max-age=0
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

max-age=0

DirectiveValueMeaning
max-age0Cache for 0 seconds
A+
Page Weight Budget
348 KB transferred, 15 requests
PASS
348 KB transferred, 15 requests
Info::
Page weighs 646 KB (348 KB transferred)
Info::
15 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
348 KB / 2.4 MB budget
348 KB transferred
15 requests
0.07 g CO2 per page load
JavaScript 168.2 KiB 48%
Fonts 91.9 KiB 26%
Images 44.5 KiB 13%
CSS 30.3 KiB 9%
HTML 10.3 KiB 3%
Other 1.5 KiB 0%
Other 545 B 0%
Other 461 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
Warning::
https://nabble.com/assets/images/home.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
2 images 45 KB
0 oversized -0 KB
2 legacy format
1 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

A+
JS Execution Cost
No JS execution data
PASS
No JS execution data
Info::
No significant JS execution detected

Main Thread Breakdown

Script Evaluation 40% Other 25% Style & Layout 22% Script Parsing & Compilation 7% Rendering 5%
A+
Font Loading
4 fonts (92 KB)
PASS
4 fonts (92 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

92 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 1.3 s LCP 1.3 shttps://fonts.gstatic.com/s/oswald/v57/TK3_WkUHHAIjg75cFRf3bXL8LICs1_FvsUZiZSSUhiCXAA.woff2TK3_WkUHHAIjg75cFRf3bXL... https://fonts.gstatic.com/s/oswald/v57/TK3_WkUHHAIjg75cFRf3bXL8LICs1_FvsUZiZSSUhiCXAA.woff2 — 12.1 KiB — 29 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXiWtFCc.woff2S6uyw4BMUTPHjx4wXiWtFCc... https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXiWtFCc.woff2 — 13.7 KiB — 36 ms — font-display: swaphttps://nabble.com/assets/font-awesome/fonts/fontawesome-webfont.woff2?v=4.4.0fontawesome-webfont.woff2 https://nabble.com/assets/font-awesome/fonts/fontawesome-webfont.woff2?v=4.4.0 — 63.2 KiB — 432 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjxAwXiWtFCfQ7A.woff2S6uyw4BMUTPHjxAwXiWtFCf... https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjxAwXiWtFCfQ7A.woff2 — 2.9 KiB — 39 ms — font-display: swap
TK3_WkUHHAIjg75cFRf3bXL... woff2 swap
Size 12 KB
Load time 29 ms
Start 771 ms
Risk FOUT — text flashes from fallback to web font
S6uyw4BMUTPHjx4wXiWtFCc... woff2 swap
Size 14 KB
Load time 36 ms
Start 792 ms
Risk FOUT — text flashes from fallback to web font
fontawesome-webfont.woff2 unknown swap
Size 63 KB
Load time 432 ms
Start 792 ms
Risk FOUT — text flashes from fallback to web font
S6uyw4BMUTPHjxAwXiWtFCf... woff2 swap
Size 3 KB
Load time 39 ms
Start 793 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)

Fixing the unchecked items could save ~19 KB and ~38 ms

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 · 348 KB · 64 KB savings available
PASS
15 resources · 348 KB · 64 KB savings available
Info::
Within 1MB page-weight target
Got: 348 KB
Info::
~64 KB of savings available
Warning::
8 third-party resources (57% of weight)
15 resources · 347.6 KiB · 8 third-party Within 1MB page-weight target
JavaScript 48% · 168.2 KiB
Font 26% · 91.9 KiB
Image 13% · 44.5 KiB
CSS 9% · 30.3 KiB
Document 3% · 11.8 KiB
Other 0% · 1006 B

~64.5 KiB of savings available

Remove unused JavaScript: 64.5 KiB
Network Waterfall
15 requests over 1387ms
INFO
0 ms 500 ms 1.0 s FCP 1.3 s LCP 1.3 shttps://nabble.com// https://nabble.com/ — 200 — 10.3 KiB — 502 ms — http/1.1https://fonts.googleapis.com/css?family=Lato|Oswaldfonts.googleapis.com/css?family=Lat... https://fonts.googleapis.com/css?family=Lato|Oswald — 200 — 1.1 KiB — 115 ms — h2https://nabble.com/assets/font-awesome/css/font-awesome.min.css?14/assets/font-awesome/css/font-aweso... https://nabble.com/assets/font-awesome/css/font-awesome.min.css?14 — 200 — 26.3 KiB — 252 ms — http/1.1https://nabble.com/assets/global.css?14/assets/global.css?14 https://nabble.com/assets/global.css?14 — 200 — 2.9 KiB — 132 ms — http/1.1https://nabble.com/assets/images/logo_nabble_home.png/assets/images/logo_nabble_home.png https://nabble.com/assets/images/logo_nabble_home.png — 200 — 1.6 KiB — 272 ms — http/1.1https://nabble.com/assets/images/home.png/assets/images/home.png https://nabble.com/assets/images/home.png — 200 — 42.9 KiB — 745 ms — http/1.1https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 81 ms — h2https://fonts.gstatic.com/s/oswald/v57/TK3_WkUHHAIjg75cFRf3bXL8LICs1_FvsUZiZSSUhiCXAA.woff2fonts.gstatic.com/s/oswald/v57/TK3_... https://fonts.gstatic.com/s/oswald/v57/TK3_WkUHHAIjg75cFRf3bXL8LICs1_FvsUZiZSSUhiCXAA.woff2 — 200 — 12.1 KiB — 29 ms — h3https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXiWtFCc.woff2fonts.gstatic.com/s/lato/v25/S6uyw4... https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXiWtFCc.woff2 — 200 — 13.7 KiB — 36 ms — h3https://nabble.com/assets/font-awesome/fonts/fontawesome-webfont.woff2?v=4.4.0/assets/font-awesome/fonts/fontawes... https://nabble.com/assets/font-awesome/fonts/fontawesome-webfont.woff2?v=4.4.0 — 200 — 63.2 KiB — 432 ms — http/1.1https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjxAwXiWtFCfQ7A.woff2fonts.gstatic.com/s/lato/v25/S6uyw4... https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjxAwXiWtFCfQ7A.woff2 — 200 — 2.9 KiB — 39 ms — h3https://www.google-analytics.com/j/collect?v=1&_v=j102&a=723087878&t=pageview&_s=1&dl=https%3A%2F%2Fnabble.com%2F&ul=en-us&dt=Nabble%20%E2%80%A2%20Free%20Forum%20%E2%80%A2%20Embeddable%20Web%20Apps&sr=800x600&vp=1350x940&_u=IEBAAEABAAAAACAAI~&jid=323044654&gjid=251526717&cid=1389271689.1776894409&tid=UA-91855-9&_gid=180988317.1776894409&_r=1&_slc=1&z=993501271www.google-analytics.com/j/collect?... https://www.google-analytics.com/j/collect?v=1&_v=j102&a=723087878&t=pageview&_s=1&dl=https%3A%2F%2Fnabble.com%2F&ul=en-us&dt=Nabble%20%E2%80%A2%20Free%20Forum%20%E2%80%A2%20Embeddable%20Web%20Apps&sr=800x600&vp=1350x940&_u=IEBAAEABAAAAACAAI~&jid=323044654&gjid=251526717&cid=1389271689.1776894409&tid=UA-91855-9&_gid=180988317.1776894409&_r=1&_slc=1&z=993501271 — 200 — 461 B — 32 ms — h2https://www.googletagmanager.com/gtag/js?id=G-GRXYWF4WWB&cx=c&_slc=1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-GRXYWF4WWB&cx=c&_slc=1 — 200 — 147.3 KiB — 166 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-GRXYWF4WWB&gtm=45je64k0v9134916630za20g&_p=1776894409132&gcd=13l3l3l2l2l1&npa=0&dma_cps=a&dma=1&_eu=ABAI&are=1&cid=1389271689.1776894409&frm=0&pscdl=noapi&rcb=5&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266401~117384405~117512542&dl=https%3A%2F%2Fnabble.com%2F&dt=Nabble%20%E2%80%A2%20Free%20Forum%20%E2%80%A2%20Embeddable%20Web%20Apps&sid=1776894409&sct=1&seg=0&_tu=wAQ&en=page_view&_fv=1&_ss=1&_ee=1&tfd=1112region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-GRXYWF4WWB&gtm=45je64k0v9134916630za20g&_p=1776894409132&gcd=13l3l3l2l2l1&npa=0&dma_cps=a&dma=1&_eu=ABAI&are=1&cid=1389271689.1776894409&frm=0&pscdl=noapi&rcb=5&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266401~117384405~117512542&dl=https%3A%2F%2Fnabble.com%2F&dt=Nabble%20%E2%80%A2%20Free%20Forum%20%E2%80%A2%20Embeddable%20Web%20Apps&sid=1776894409&sct=1&seg=0&_tu=wAQ&en=page_view&_fv=1&_ss=1&_ee=1&tfd=1112 — 204 — 545 B — 81 ms — h2https://nabble.com/favicon.ico/favicon.ico https://nabble.com/favicon.ico — 404 — 1.5 KiB — 128 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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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