https://omnisphere.xaiproperties.com
Performance
· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
85
GRADE
B
FIX
4
REVIEW
5
PASS
14
INFO
4
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
43
92
73
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.09 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
9.19 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5.18 s
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.
4.03 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.
17.56 s
Page Load Progression
467 ms 934 ms
1.4 s
1.9 s
2.3 s
2.8 s 3.3 s
3.7 sChecks
2714 PASS 5 REVIEW 4 FIX
FJS Execution CostAction10129ms total JS executionFIX
JS Execution Cost
Action10129ms total JS execution
10129ms total JS execution
Warning::
https://omnisphere.xaiproperties.com/_next/static/...: 4530ms CPU time
Warning::
https://omnisphere.xaiproperties.com/_next/static/...: 1918ms CPU time
Warning::
https://omnisphere.xaiproperties.com/_next/static/...: 1431ms CPU time
Warning::
Unattributable: 545ms CPU time
Warning::
https://omnisphere.xaiproperties.com/: 380ms CPU time
Info::
Third-party scripts: 208ms (2% of total)
Main Thread Breakdown
Other 58% Script Evaluation 31% Style & Layout 4% Script Parsing & Compilation 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://omnisphere.xaiproperties.com/_next/static/chunks/23a8xs75w-uf9.js | 4530ms | 558ms | 140ms | 1st |
| https://omnisphere.xaiproperties.com/_next/static/chunks/2n_95vkrc_bfl.js | 1918ms | 1361ms | 15ms | 1st |
| https://omnisphere.xaiproperties.com/_next/static/chunks/1ibkovy6w94vf.js | 1431ms | 82ms | 16ms | 1st |
| Unattributable | 545ms | 123ms | 0ms | 1st |
| https://omnisphere.xaiproperties.com/ | 380ms | 89ms | 10ms | 1st |
| https://omnisphere.xaiproperties.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 332ms | 320ms | 3ms | 1st |
| https://omnisphere.xaiproperties.com/_next/static/chunks/1a20zcgur7m3o.js | 263ms | 232ms | 9ms | 1st |
| https://omnisphere.xaiproperties.com/fgi3/OcJhDLvri0e9OshuhcFOCTPf1dABmf7QQSuS5iC4sVvbyDZXhzo | 217ms | 149ms | 37ms | 1st |
| https://omnisphere.xaiproperties.com/_next/static/chunks/1q512agfcb8xv.js | 211ms | 37ms | 0ms | 1st |
| https://omnisphere.xaiproperties.com/fgi3/ | 95ms | 60ms | 30ms | 1st |
Showing top 10 of 13 scripts
FJS BundlesAction40 scripts, 692 KB unusedFIX
JS Bundles
Action40 scripts, 692 KB unused
40 scripts, 692 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-XVYT...: 121 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://omnisphere.xaiproperties.com/_next/static/...: 120 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://omnisphere.xaiproperties.com/_next/static/...: 120 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://omnisphere.xaiproperties.com/fgi3/OcJhDLvr...: 80 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://omnisphere.xaiproperties.com/fgi3/: 74 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 692 KB
692 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-XVYTRKVLJP | 175 KB | 121 KB (69%) | ✓ | 3rd |
| https://omnisphere.xaiproperties.com/_next/static/chunks/23a8xs75w-uf9.js | 0 KB | 120 KB (51%) | ✓ | 1st |
| https://omnisphere.xaiproperties.com/_next/static/chunks/23a8xs75w-uf9.js | 237 KB | 120 KB (51%) | ✓ | 1st |
| https://omnisphere.xaiproperties.com/fgi3/OcJhDLvri0e9OshuhcFOCTPf1dABmf7QQSuS5iC4sVvbyDZXhzo | 185 KB | 80 KB (43%) | ✓ | 1st |
| https://omnisphere.xaiproperties.com/fgi3/ | 122 KB | 74 KB (61%) | ✓ | 1st |
| https://www.googletagmanager.com/gtm.js?id=GTM-WVNDMQVG | 116 KB | 73 KB (63%) | ✓ | 3rd |
| https://omnisphere.xaiproperties.com/_next/static/chunks/3ionc-6oyd27r.js | 49 KB | 37 KB (77%) | ✓ | 1st |
| https://omnisphere.xaiproperties.com/_next/static/chunks/1ibkovy6w94vf.js | 0 KB | 23 KB (57%) | ✓ | 1st |
| https://omnisphere.xaiproperties.com/_next/static/chunks/1ibkovy6w94vf.js | 41 KB | 23 KB (57%) | ✓ | 1st |
| https://omnisphere.xaiproperties.com/_next/static/chunks/2n_95vkrc_bfl.js | 73 KB | 21 KB (30%) | ✓ | 1st |
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
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
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
DPage Weight InventoryAction96 resources · 1.6 MB · 692 KB savings availableFIX
Page Weight Inventory
Action96 resources · 1.6 MB · 692 KB savings available
96 resources · 1.6 MB · 692 KB savings available
Warning::
Page weight 1.6 MB exceeds 1 MB target by 651 KB
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~692 KB of savings available
Info::
15 third-party resources (18% of weight)
Info::
1 resources over 200KB
96 resources · 1.6 MiB · 15 third-party 650.7 KiB over 1MB target
JavaScript 74% · 1.2 MiB
Font 18% · 302.5 KiB
Other 4% · 72.0 KiB
CSS 2% · 29.3 KiB
Document 1% · 21.2 KiB
Image 1% · 11.7 KiB
~692.0 KiB of savings available
Remove unused JavaScript: 692.0 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 96 resources | 1.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
HTTP Caching
ActionNo cache headers
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
Info::
Last-Modified header present
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.6 MB transferred, 96 requestsREVIEW
Page Weight Budget
Action1.6 MB transferred, 96 requests
1.6 MB transferred, 96 requests
Info::
Page weighs 5.5 MB (1.6 MB transferred)
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Info::
Fonts are 302 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 302 KB
Info::
96 HTTP requests
Info::
Estimated 0.34 g CO2 per page load
1.6 MB transferred
96 requests
0.34 g CO2 per page load
JavaScript 1.2 MiB 74%
Fonts 302.5 KiB 18%
Other 78.0 KiB 5%
CSS 29.3 KiB 2%
Other 12.4 KiB 1%
HTML 11.4 KiB 1%
Other 1.8 KiB 0%
Other 1.1 KiB 0%
Other 157 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Why this matters
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Subset fonts to include only used characters, or switch to system font stacks.
Why this matters
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
Main HTML Cache-Control
No Cache-Control header on main HTML response
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
JavaScript Blocking
2 JS blocking issue(s) detected
2 JS blocking issue(s) detected
Warning::
1 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
Total JS execution time is 10.1 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Third-Party Impact18% third-party, 0 ms blockingPASS
Third-Party Impact
18% third-party, 0 ms blocking
18% third-party, 0 ms blocking
Info::
Third-party code accounts for 18% of page weight (305.5 KiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
82%
18%
First-party Third-party
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Image OptimizationNo images on this pagePASS
Image Optimization
No images on this page
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+Font Loading9 fonts (302 KB)PASS
Font Loading
9 fonts (302 KB)
9 fonts (302 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
9
302 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
ibm_plex_sans_arabic_ar... woff2 swap
Size 42 KB
Load time 39 ms
Start 168 ms
Risk FOUT — text flashes from fallback to web font
ibm_plex_sans_arabic_ar... woff2 swap
Size 45 KB
Load time 74 ms
Start 169 ms
Risk FOUT — text flashes from fallback to web font
ibm_plex_sans_arabic_ar... woff2 swap
Size 45 KB
Load time 74 ms
Start 169 ms
Risk FOUT — text flashes from fallback to web font
ibm_plex_sans_arabic_ar... woff2 swap
Size 44 KB
Load time 52 ms
Start 169 ms
Risk FOUT — text flashes from fallback to web font
ibm_plex_sans_arabic_la... woff2 swap
Size 19 KB
Load time 78 ms
Start 169 ms
Risk FOUT — text flashes from fallback to web font
ibm_plex_sans_arabic_la... woff2 swap
Size 20 KB
Load time 78 ms
Start 170 ms
Risk FOUT — text flashes from fallback to web font
ibm_plex_sans_arabic_la... woff2 swap
Size 20 KB
Load time 78 ms
Start 170 ms
Risk FOUT — text flashes from fallback to web font
ibm_plex_sans_arabic_la... woff2 swap
Size 19 KB
Load time 78 ms
Start 170 ms
Risk FOUT — text flashes from fallback to web font
inter_latin_wght_normal... woff2 swap
Size 48 KB
Load time 79 ms
Start 170 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 CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
AServer Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: br` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
Render-Blocking Resources
No render-blocking resources detected
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+Third-Party ResourcesNo third-party resources detectedPASS
Third-Party Resources
No third-party resources detected
No third-party resources detected
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
CSS Performance Depth
No CSS performance depth issues detected
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Asset CompressionNo text asset hosts to measureINFO
Asset Compression
No text asset hosts to measure
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall96 requests over 1468msINFO
Network Waterfall
96 requests over 1468ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
2% of JavaScript execution is third-party
First-party Third-party 208ms · 302KB · $3/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 84ms | 116 KB | 63% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 69ms | 175 KB | 69% | $1/mo | Optional |
static.cloudflareinsights.com static.cloudflareinsights.com | Other | 55ms | 10 KB | — | $1/mo | Optional |
Google Tag Manager
Tag Manager
Execution 84ms
Transfer 116 KB
Unused 63%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Execution 69ms
Transfer 175 KB
Unused 69%
Monthly Cost $1/mo
static.cloudflareinsights.com
Other
Execution 55ms
Transfer 10 KB
Monthly Cost $1/mo
63% of Google Tag Manager'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
69% of Google Tag Manager'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
Image Optimization1 images, 1 KB total, 0 KB wastedINFO
Image Optimization
1 images, 1 KB total, 0 KB wasted
Image Optimization Audit
Total Images
1
Total Size
1 KB
1 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.