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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
1
PASS
10
INFO
1

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
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.
91
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.

874 ms

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

947 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.

0.016

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

874 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.

947 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
14
10 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 (189.6 KiB of 189.7 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.

B
JS Bundles
2 scripts, 67 KB unused
REVIEW
2 scripts, 67 KB unused
Warning::
https://simgbb.com/8179/ibb.js: 46 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://simgbb.com/8179/jquery2.js: 21 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 67 KB
67 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://simgbb.com/8179/ibb.js57 KB46 KB (80%)✓3rd
https://simgbb.com/8179/jquery2.js40 KB21 KB (53%)✓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

A+
Page Weight Budget
190 KB transferred, 11 requests
PASS
190 KB transferred, 11 requests
Info::
Page weighs 556 KB (190 KB transferred)
Info::
11 HTTP requests
Info::
Estimated 0.04 g CO2 per page load
190 KB / 2.4 MB budget
190 KB transferred
11 requests
0.04 g CO2 per page load
JavaScript 97.3 KiB 51%
Fonts 50.5 KiB 27%
CSS 23.7 KiB 12%
HTML 9.7 KiB 5%
Other 7.4 KiB 4%
Images 1.1 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+
Image Optimization
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 1 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
No JS execution data
PASS
No JS execution data
Info::
No significant JS execution detected

Main Thread Breakdown

Script Evaluation 32% Style & Layout 28% Other 27% Script Parsing & Compilation 6% Parse HTML & CSS 5%
A+
Font Loading
2 fonts (50 KB)
PASS
2 fonts (50 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

51 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 874 ms LCP 947 mshttps://simgbb.com/fonts/imgbb.woff2imgbb.woff2 https://simgbb.com/fonts/imgbb.woff2 — 8.5 KiB — 79 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.0 KiB — 38 ms — font-display: swap
imgbb.woff2 woff2 swap
Size 9 KB
Load time 79 ms
Start 290 ms
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 38 ms
Start 291 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
Page Weight Inventory
11 resources · 190 KB · 67 KB savings available
PASS
11 resources · 190 KB · 67 KB savings available
Info::
Within 1MB page-weight target
Got: 190 KB
Info::
~67 KB of savings available
Warning::
10 third-party resources (100% of weight)
11 resources · 189.7 KiB · 10 third-party Within 1MB page-weight target
JavaScript 51% · 97.3 KiB
Font 27% · 50.5 KiB
CSS 12% · 23.7 KiB
Document 5% · 9.8 KiB
Image 4% · 8.4 KiB

~67.0 KiB of savings available

Remove unused JavaScript: 67.0 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: OVHcloud

Network Waterfall
11 requests over 423ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 874 ms LCP 947 mshttps://ibb.co// https://ibb.co/ — 301 — 147 B — 62 ms — h2https://imgbb.com/imgbb.com/ https://imgbb.com/ — 200 — 9.7 KiB — 87 ms — h2https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500&display=swapfonts.googleapis.com/css2?family=Op... https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500&display=swap — 200 — 2.2 KiB — 78 ms — h2https://simgbb.com/8179/ibb.csssimgbb.com/8179/ibb.css https://simgbb.com/8179/ibb.css — 200 — 21.5 KiB — 97 ms — h2https://simgbb.com/images/logo.pngsimgbb.com/images/logo.png https://simgbb.com/images/logo.png — 200 — 1.1 KiB — 37 ms — h2https://simgbb.com/8179/jquery2.jssimgbb.com/8179/jquery2.js https://simgbb.com/8179/jquery2.js — 200 — 39.9 KiB — 58 ms — h2https://simgbb.com/8179/ibb.jssimgbb.com/8179/ibb.js https://simgbb.com/8179/ibb.js — 200 — 57.4 KiB — 78 ms — h2https://simgbb.com/fonts/imgbb.woff2simgbb.com/fonts/imgbb.woff2 https://simgbb.com/fonts/imgbb.woff2 — 200 — 8.5 KiB — 79 ms — h2https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2fonts.gstatic.com/s/opensans/v44/me... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 200 — 42.0 KiB — 38 ms — h3https://simgbb.com/images/favicon.pngsimgbb.com/images/favicon.png https://simgbb.com/images/favicon.png — 200 — 7.3 KiB — 38 ms — h2https://simgbb.com/images/favicon.pngsimgbb.com/images/favicon.png https://simgbb.com/images/favicon.png — 200 — 0 B — 1 ms — h2
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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