Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

Best Practices

SEO

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.

2.35 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

149 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.

1.38 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.

2.35 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

10 PASS 5 REVIEW 4 FIX

Page Weight Budget

Action

2.1 MB transferred, 31 requests

FIX

2.1 MB transferred, 31 requests

Page weighs 3.3 MB (2.1 MB transferred)

Images are 1.3 MB — compress or use modern formats

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Got: 1.3 MB

31 HTTP requests

Estimated 0.45 g CO2 per page load

2.1 MB transferred

31 requests

0.45 g CO2 per page load

Images 1.3 MiB 62%

JavaScript 344.6 KiB 16%

Other 273.6 KiB 13%

HTML 103.8 KiB 5%

Fonts 71.0 KiB 3%

CSS 25.4 KiB 1%

Other 3.3 KiB 0%

Other 289 B 0%

Other 0 B 0%

0 2.4 MB 4.9 MB

Approaching limit

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Third-Party Impact

Action

88% third-party, 0 ms blocking

FIX

88% third-party, 0 ms blocking

Third-party code accounts for 88% of page weight (1.9 MiB of 2.1 MiB)

Third-party blocking time is low (0 ms)

88%

First-party Third-party

Page Weight Inventory

Action

31 resources · 2.1 MB · 142 KB savings available

FIX

31 resources · 2.1 MB · 142 KB savings available

Page weight 2.1 MB exceeds 1 MB target by 1.1 MB

Got: 2.1 MB Expected: ≤ 1 MB

~142 KB of savings available

22 third-party resources (88% of weight)

4 resources over 200KB

31 resources · 2.1 MiB · 22 third-party 1.1 MiB over 1MB target

Image 75% · 1.6 MiB

JavaScript 16% · 344.6 KiB

Document 5% · 103.8 KiB

Font 3% · 71.0 KiB

CSS 1% · 25.4 KiB

Other 0% · 5.5 KiB

~142.0 KiB of savings available

Remove unused JavaScript: 142.0 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

31 resources			2.1 MiB

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: no-cache, no-store, must-revalidate

Last-Modified header present

Cache-Control

no-cache, no-store, must-revalidate

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first
no-store	—	Never cache this response
must-revalidate	—	Must recheck with server after expiry

JS Execution Cost

583ms total JS execution

REVIEW

583ms total JS execution

https://files.manuscdn.com/manus-space-dispatcher/...: 270ms CPU time

https://origopg-mwnz8lgk.manus.space/: 141ms CPU time

Unattributable: 99ms CPU time

https://origopg-mwnz8lgk.manus.space/assets/index-...: 74ms CPU time

Third-party scripts: 270ms (46% of total)

Main Thread Breakdown

Script Evaluation 50% Other 23% Style & Layout 14% Script Parsing & Compilation 7%

Script	Total	Scripting	Parse/Compile	Party
https://files.manuscdn.com/manus-space-dispatcher/spaceEditor-DPV-_I11.js	270ms	233ms	27ms	3rd
https://origopg-mwnz8lgk.manus.space/	141ms	22ms	13ms	1st
Unattributable	99ms	2ms	0ms	1st
https://origopg-mwnz8lgk.manus.space/assets/index-CXLDF2Na.js	74ms	41ms	1ms	1st

JS Bundles

4 scripts, 142 KB unused

REVIEW

4 scripts, 142 KB unused

https://origopg-mwnz8lgk.manus.space/assets/index-...: 80 KB unused (59%)

Consider code splitting or tree shaking to reduce unused code.

https://files.manuscdn.com/manus-space-dispatcher/...: 62 KB unused (31%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 142 KB

142 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://origopg-mwnz8lgk.manus.space/assets/index-CXLDF2Na.js	135 KB	80 KB (59%)	✓	1st
https://files.manuscdn.com/manus-space-dispatcher/spaceEditor-DPV-_I11.js	204 KB	62 KB (31%)	✓	3rd
https://manus-analytics.com/umami	2 KB	—	✓	3rd
https://plausible.io/js/script.file-downloads.hash.outbound-links.pageview-props.revenue.tagged-events.js	3 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

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

HTTP/3 (QUIC)

HTTP/3 not advertised

REVIEW

HTTP/3 not advertised

HTTP/3 (QUIC) is not advertised

HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.

Compression Algorithm

Main response uses gzip; brotli would be ~20% smaller

REVIEW

Main response uses gzip; brotli would be ~20% smaller

Main HTML response uses gzip (brotli would be ~20% smaller)

All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.

Server-Timing Observability

No Server-Timing header found

REVIEW

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.

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

Image Optimization

3 images, 0 KB saveable

PASS

3 images, 0 KB saveable

All images are well-optimized

3 images 1.3 MB

0 oversized -0 KB

2 legacy format

0 missing dimensions CLS risk

A+

Font Loading

3 fonts (71 KB)

PASS

3 fonts (71 KB)

3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

71 KB total

Render-blocking

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

zYXzKVElMYYaJe8bpLHnCwD... woff2 swap

Size 39 KB

Load time 37 ms

Start 1.1 s

Risk FOUT — text flashes from fallback to web font

-F63fjptAgt5VM-kVkqdyU8... woff2 swap

Size 10 KB

Load time 32 ms

Start 1.2 s

Risk FOUT — text flashes from fallback to web font

V8mDoQDjQSkFtoMM3T6r8E7... woff2 swap

Size 22 KB

Load time 31 ms

Start 1.2 s

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

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

No optimization needed

PASS

No optimization needed

No resource hint issues

A+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

LCP image preload audit not available for this scan

A+

Main HTML Cache-Control

Main HTML uses no-store -- correct for sensitive/dynamic content

PASS

Main HTML uses no-store -- correct for sensitive/dynamic content

Got: no-cache, no-store, must-revalidate

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

Compressed response missing `Vary` header

The page is served with `Content-Encoding: gzip` 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.

`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+

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

31 requests over 3237ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

46% of JavaScript execution is third-party

First-party Third-party 270ms · 204KB · €3/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
files.manuscdn.com files.manuscdn.com	Other	270ms	204 KB	31%	€3/mo	Costly

files.manuscdn.com

Other

Costly

Execution 270ms

Transfer 204 KB

Unused 31%

Monthly Cost €3/mo

These scripts may cost more than they're worth

files.manuscdn.com adds 270ms and costs ~€3/month

46% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

files.manuscdn.com takes 270ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

Image Optimization

4 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

0 KB

Oversized

4 missing dimensions 3 missing lazy loading

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.