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Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
0
REVIEW
4
PASS
19
INFO
2

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

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

1.23 s

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

2.19 s

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

353 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.002

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

1.46 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.

3.86 s

Page Load Progression

471 ms
942 ms
1.4 s
1.9 s
2.4 s
2.8 s
3.3 s
3.8 s
Checks
25
19 PASS 4 REVIEW
C
JS Execution Cost
Action
1856ms total JS execution
REVIEW
1856ms total JS execution
Warning::
https://filemaktab.com/: 819ms CPU time
Warning::
https://filemaktab.com/assets/index-DBWfGg-6.js: 795ms CPU time
Info::
Unattributable: 242ms CPU time

Main Thread Breakdown

Other 39% Style & Layout 27% Script Evaluation 26% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://filemaktab.com/819ms26ms2ms1st
https://filemaktab.com/assets/index-DBWfGg-6.js795ms416ms2ms1st
Unattributable242ms6ms0ms1st
B
JS Bundles
12 scripts, 68 KB unused
REVIEW
12 scripts, 68 KB unused
Warning::
https://filemaktab.com/assets/index-DBWfGg-6.js: 47 KB unused (22%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://filemaktab.com/assets/ui-vendor-Ds9ZzRJn.j...: 21 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://filemaktab.com/assets/ui-vendor-Ds9ZzRJn.j...: unminified — 7 KB could be saved
Info::
Total unused JavaScript: 68 KB
68 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://filemaktab.com/assets/index-DBWfGg-6.js222 KB47 KB (22%)✓1st
https://filemaktab.com/assets/ui-vendor-Ds9ZzRJn.js41 KB21 KB (53%)✗1st
https://filemaktab.com/assets/data-vendor-B42qWCM9.js33 KB—✓1st
https://filemaktab.com/assets/FileMaktabSidebar-LW2VwcPb.js5 KB—✓1st
https://filemaktab.com/assets/MonitoringBridge-DRrfk7tS.js1 KB—✓1st
https://filemaktab.com/assets/monitoringClient-DUCl_z1j.js1 KB—✓1st
https://filemaktab.com/assets/supportSession-Bc66AMeq.js1 KB—✓1st
https://filemaktab.com/assets/GA4Tracker-BSBm5FY6.js1 KB—✓1st
https://filemaktab.com/assets/FloatingFileAssistant-DKu5ejq6.js2 KB—✓1st
https://filemaktab.com/assets/supportContext-CQ3jqoQ8.js1 KB—✓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

B
Server-Timing Observability
No Server-Timing header found
REVIEW
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.
B
HTTP Caching
no-cache, stale-while-revalidate=60
REVIEW
no-cache, stale-while-revalidate=60
Info::
Cache-Control header is set
Got: no-cache, stale-while-revalidate=60
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, stale-while-revalidate=60

DirectiveValueMeaning
no-cache—Cache but always revalidate first
stale-while-revalidate60Serve stale for 1 minute while fetching fresh
A+
Page Weight Budget
419 KB transferred, 20 requests
PASS
419 KB transferred, 20 requests
Info::
Page weighs 1.5 MB (419 KB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.09 g CO2 per page load
419 KB / 2.4 MB budget
419 KB transferred
20 requests
0.09 g CO2 per page load
JavaScript 312.9 KiB 75%
CSS 57.8 KiB 14%
Fonts 21.8 KiB 5%
HTML 20.8 KiB 5%
Other 3.3 KiB 1%
Other 1.3 KiB 0%
Other 1.0 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
6% third-party, 0 ms blocking
PASS
6% third-party, 0 ms blocking
Info::
Third-party code accounts for 6% of page weight (23.5 KiB of 418.9 KiB)
Info::
Third-party blocking time is low (0 ms)
94%
First-party Third-party
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
No images on this page
PASS
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 Loading
1 fonts (22 KB)
PASS
1 fonts (22 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

22 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.2 s LCP 2.2 shttps://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4Cw.woff2V8mDoQDjQSkFtoMM3T6r8E7... https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4Cw.woff2 — 21.8 KiB — 122 ms — font-display: swap
V8mDoQDjQSkFtoMM3T6r8E7... woff2 swap
Size 22 KB
Load time 122 ms
Start 299 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
2
preload
2
dns-prefetch
—
prefetch
—

4 resource hints configured

A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
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 Compression
Document response uses brotli
PASS
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 Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-cache -- safe revalidate-on-request policy
PASS
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache, stale-while-revalidate=60
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+
Page Weight Inventory
20 resources · 419 KB · 68 KB savings available
PASS
20 resources · 419 KB · 68 KB savings available
Info::
Within 1MB page-weight target
Got: 419 KB
Info::
~68 KB of savings available
Info::
2 third-party resources (6% of weight)
Info::
1 resources over 200KB
20 resources · 418.9 KiB · 2 third-party Within 1MB page-weight target
JavaScript 75% · 312.9 KiB
CSS 14% · 57.8 KiB
Font 5% · 21.8 KiB
Document 5% · 20.8 KiB
Image 1% · 3.3 KiB
Other 1% · 2.3 KiB

~68.3 KiB of savings available

Remove unused JavaScript: 68.3 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+
JavaScript Blocking
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues 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

Asset Compression
No text asset hosts to measure
INFO
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 Waterfall
20 requests over 1455ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.2 s LCP 2.2 shttps://filemaktab.com// https://filemaktab.com/ — 200 — 20.8 KiB — 278 ms — h2https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4Cw.woff2fonts.gstatic.com/s/spacegrotesk/v2... https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4Cw.woff2 — 200 — 21.8 KiB — 122 ms — h3https://filemaktab.com/assets/index-DBWfGg-6.js/assets/index-DBWfGg-6.js https://filemaktab.com/assets/index-DBWfGg-6.js — 200 — 222.2 KiB — 302 ms — h2https://filemaktab.com/assets/data-vendor-B42qWCM9.js/assets/data-vendor-B42qWCM9.js https://filemaktab.com/assets/data-vendor-B42qWCM9.js — 200 — 33.0 KiB — 291 ms — h2https://filemaktab.com/assets/ui-vendor-Ds9ZzRJn.js/assets/ui-vendor-Ds9ZzRJn.js https://filemaktab.com/assets/ui-vendor-Ds9ZzRJn.js — 200 — 40.8 KiB — 293 ms — h2https://filemaktab.com/assets/index-DG5nTpnr.css/assets/index-DG5nTpnr.css https://filemaktab.com/assets/index-DG5nTpnr.css — 200 — 53.9 KiB — 288 ms — h2https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans+Arabic:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=optionalfonts.googleapis.com/css2?family=IB... https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans+Arabic:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=optional — 200 — 1.7 KiB — 163 ms — h2https://filemaktab.com/site.webmanifest/site.webmanifest https://filemaktab.com/site.webmanifest — 200 — 1.3 KiB — 245 ms — h3https://filemaktab.com/assets/FileMaktabSidebar-LW2VwcPb.js/assets/FileMaktabSidebar-LW2VwcPb.... https://filemaktab.com/assets/FileMaktabSidebar-LW2VwcPb.js — 200 — 5.3 KiB — 198 ms — h3https://filemaktab.com/assets/FileMaktabSidebar-CaSDmRBX.css/assets/FileMaktabSidebar-CaSDmRBX.... https://filemaktab.com/assets/FileMaktabSidebar-CaSDmRBX.css — 200 — 2.2 KiB — 348 ms — h3https://filemaktab.com/favicon.ico/favicon.ico https://filemaktab.com/favicon.ico — 200 — 3.3 KiB — 179 ms — h3https://filemaktab.com/assets/MonitoringBridge-DRrfk7tS.js/assets/MonitoringBridge-DRrfk7tS.j... https://filemaktab.com/assets/MonitoringBridge-DRrfk7tS.js — 200 — 924 B — 436 ms — h3https://filemaktab.com/assets/monitoringClient-DUCl_z1j.js/assets/monitoringClient-DUCl_z1j.j... https://filemaktab.com/assets/monitoringClient-DUCl_z1j.js — 200 — 971 B — 434 ms — h3https://filemaktab.com/assets/supportSession-Bc66AMeq.js/assets/supportSession-Bc66AMeq.js https://filemaktab.com/assets/supportSession-Bc66AMeq.js — 200 — 803 B — 435 ms — h3https://filemaktab.com/assets/GA4Tracker-BSBm5FY6.js/assets/GA4Tracker-BSBm5FY6.js https://filemaktab.com/assets/GA4Tracker-BSBm5FY6.js — 200 — 560 B — 189 ms — h3https://filemaktab.com/assets/FloatingFileAssistant-DKu5ejq6.js/assets/FloatingFileAssistant-DKu5e... https://filemaktab.com/assets/FloatingFileAssistant-DKu5ejq6.js — 200 — 2.3 KiB — 415 ms — h3https://filemaktab.com/assets/supportContext-CQ3jqoQ8.js/assets/supportContext-CQ3jqoQ8.js https://filemaktab.com/assets/supportContext-CQ3jqoQ8.js — 200 — 1.2 KiB — 392 ms — h3https://filemaktab.com/api/trpc/auth.me?batch=1&input=%7B%220%22%3A%7B%22json%22%3Anull%2C%22meta%22%3A%7B%22values%22%3A%5B%22undefined%22%5D%7D%7D%7D/api/trpc/auth.me?batch=1&input=%7B... https://filemaktab.com/api/trpc/auth.me?batch=1&input=%7B%220%22%3A%7B%22json%22%3Anull%2C%22meta%22%3A%7B%22values%22%3A%5B%22undefined%22%5D%7D%7D%7D — 200 — 1.0 KiB — 218 ms — h3https://filemaktab.com/assets/FilePreview-DCSEpEXJ.js/assets/FilePreview-DCSEpEXJ.js https://filemaktab.com/assets/FilePreview-DCSEpEXJ.js — 200 — 3.4 KiB — 187 ms — h3https://filemaktab.com/assets/dialog-Bcbr0zSi.js/assets/dialog-Bcbr0zSi.js https://filemaktab.com/assets/dialog-Bcbr0zSi.js — 200 — 1.4 KiB — 173 ms — h3
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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