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Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
91
GRADE
A
FIX
2
REVIEW
3
PASS
18
INFO
4

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

Mobile Desktop
87
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.

2.50 s

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

2.95 s

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

227 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.

3.00 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.

7.46 s

Page Load Progression

649 ms
1.3 s
1.9 s
2.6 s
3.2 s
3.9 s
4.5 s
5.2 s
Checks
27
18 PASS 3 REVIEW 2 FIX
D
JS Execution Cost
Action
2255ms total JS execution
FIX
2255ms total JS execution
Warning::
https://rewordsai.app/assets/framework-DJH1pfSr.js: 825ms CPU time
Warning::
https://rewordsai.app/: 561ms CPU time
Warning::
Unattributable: 322ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-XZK9...: 278ms CPU time
Info::
https://scripts.clarity.ms/0.8.69/clarity.js: 205ms CPU time
Info::
Third-party scripts: 547ms (24% of total)

Main Thread Breakdown

Script Evaluation 52% Other 23% Style & Layout 16% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://rewordsai.app/assets/framework-DJH1pfSr.js825ms706ms0ms1st
https://rewordsai.app/561ms19ms26ms1st
Unattributable322ms30ms0ms1st
https://www.googletagmanager.com/gtag/js?id=G-XZK9WYVKKD278ms218ms57ms3rd
https://scripts.clarity.ms/0.8.69/clarity.js205ms183ms6ms3rd
https://accounts.google.com/gsi/client63ms45ms18ms3rd
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, must-revalidate

DirectiveValueMeaning
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
B
Third-Party Impact
50% third-party, 0 ms blocking
REVIEW
50% third-party, 0 ms blocking
Warning::
Third-party code accounts for 50% of page weight (359.0 KiB of 716.1 KiB)
Info::
Third-party blocking time is low (0 ms)
50%
50%
First-party Third-party
C
JS Bundles
Action
63 scripts, 194 KB unused
REVIEW
63 scripts, 194 KB unused
Warning::
https://accounts.google.com/gsi/client: 73 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-XZK9...: 70 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://umami.bestvid.net/recorder.js: 51 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 194 KB
194 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://accounts.google.com/gsi/client97 KB73 KB (75%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-XZK9WYVKKD166 KB70 KB (43%)✓3rd
https://umami.bestvid.net/recorder.js58 KB51 KB (88%)✓3rd
https://rewordsai.app/assets/global-error-CVl8f3Cz.js1 KB—✓1st
https://rewordsai.app/assets/framework-DJH1pfSr.js60 KB—✓1st
https://rewordsai.app/assets/rolldown-runtime-QTnfLwEv.js1 KB—✓1st
https://rewordsai.app/assets/url-utils-BQKFb685.js1 KB—✓1st
https://rewordsai.app/assets/error-BfKPhPMG.js1 KB—✓1st
https://rewordsai.app/assets/navigation-S2zqLEkv.js1 KB—✓1st
https://rewordsai.app/assets/react-DlbkFqaW.js13 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

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.
A
Page Weight Budget
716 KB transferred, 84 requests
PASS
716 KB transferred, 84 requests
Info::
Page weighs 2.1 MB (716 KB transferred)
Warning::
JavaScript is 558 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 558 KB
Info::
84 HTTP requests
Info::
Estimated 0.15 g CO2 per page load
716 KB / 2.4 MB budget
716 KB transferred
84 requests
0.15 g CO2 per page load
JavaScript 558.4 KiB 78%
Images 51.3 KiB 7%
HTML 43.1 KiB 6%
CSS 30.8 KiB 4%
Other 24.6 KiB 3%
Other 6.1 KiB 1%
Other 904 B 0%
Other 862 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget

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

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
Info::
All images are well-optimized
2 images 51 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
1 URL(s) appear in multiple hints
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: /images/hero-menu-before-360.webp (preload+preload).
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
—
preload
2
dns-prefetch
—
prefetch
—

2 resource hints configured

The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: /images/hero-menu-before-360.webp (preload+preload).

Why this matters

Performance issues directly impact user engagement and conversion rates.

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+
Compression Algorithm
Main response uses brotli
PASS
Main 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-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store, must-revalidate
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: RSC, Accept, Next-Router-State-Tree, Next-Router-Prefetch, Next-Router-Segment-P...
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
84 resources · 716 KB · 194 KB savings available
PASS
84 resources · 716 KB · 194 KB savings available
Info::
Within 1MB page-weight target
Got: 716 KB
Info::
~194 KB of savings available
Warning::
19 third-party resources (50% of weight)
84 resources · 716.1 KiB · 19 third-party Within 1MB page-weight target
JavaScript 78% · 558.4 KiB
Image 11% · 75.9 KiB
Document 6% · 43.1 KiB
CSS 4% · 30.8 KiB
Other 1% · 7.8 KiB

~193.8 KiB of savings available

Remove unused JavaScript: 193.8 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

Network Waterfall
84 requests over 2881ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.5 s LCP 2.9 shttps://rewordsai.app// https://rewordsai.app/ — 200 — 43.1 KiB — 199 ms — h2https://rewordsai.app/images/hero-menu-before-360.webp/images/hero-menu-before-360.webp https://rewordsai.app/images/hero-menu-before-360.webp — 200 — 26.3 KiB — 101 ms — h2https://rewordsai.app/assets/index-DnvjvXh-.css/assets/index-DnvjvXh-.css https://rewordsai.app/assets/index-DnvjvXh-.css — 200 — 30.2 KiB — 81 ms — h2https://rewordsai.app/assets/global-error-CVl8f3Cz.js/assets/global-error-CVl8f3Cz.js https://rewordsai.app/assets/global-error-CVl8f3Cz.js — 200 — 862 B — 83 ms — h2https://rewordsai.app/assets/framework-DJH1pfSr.js/assets/framework-DJH1pfSr.js https://rewordsai.app/assets/framework-DJH1pfSr.js — 200 — 59.7 KiB — 266 ms — h2https://rewordsai.app/assets/rolldown-runtime-QTnfLwEv.js/assets/rolldown-runtime-QTnfLwEv.j... https://rewordsai.app/assets/rolldown-runtime-QTnfLwEv.js — 200 — 728 B — 101 ms — h2https://rewordsai.app/assets/url-utils-BQKFb685.js/assets/url-utils-BQKFb685.js https://rewordsai.app/assets/url-utils-BQKFb685.js — 200 — 1.3 KiB — 174 ms — h2https://rewordsai.app/assets/error-BfKPhPMG.js/assets/error-BfKPhPMG.js https://rewordsai.app/assets/error-BfKPhPMG.js — 200 — 769 B — 233 ms — h2https://rewordsai.app/assets/navigation-S2zqLEkv.js/assets/navigation-S2zqLEkv.js https://rewordsai.app/assets/navigation-S2zqLEkv.js — 200 — 1.5 KiB — 249 ms — h2https://rewordsai.app/assets/react-DlbkFqaW.js/assets/react-DlbkFqaW.js https://rewordsai.app/assets/react-DlbkFqaW.js — 200 — 13.3 KiB — 231 ms — h2https://rewordsai.app/assets/BaseLink-2VVnD4hp.js/assets/BaseLink-2VVnD4hp.js https://rewordsai.app/assets/BaseLink-2VVnD4hp.js — 200 — 5.6 KiB — 254 ms — h2https://rewordsai.app/assets/locale-BQ4hC9K3.js/assets/locale-BQ4hC9K3.js https://rewordsai.app/assets/locale-BQ4hC9K3.js — 200 — 2.4 KiB — 84 ms — h2https://rewordsai.app/assets/react-client-CAjdHkmk.js/assets/react-client-CAjdHkmk.js https://rewordsai.app/assets/react-client-CAjdHkmk.js — 200 — 440 B — 208 ms — h2https://rewordsai.app/assets/layout-segment-context-B0vqr_nk.js/assets/layout-segment-context-B0vq... https://rewordsai.app/assets/layout-segment-context-B0vqr_nk.js — 200 — 515 B — 90 ms — h2https://rewordsai.app/assets/NextIntlClientProvider-d9oaY35C.js/assets/NextIntlClientProvider-d9oa... https://rewordsai.app/assets/NextIntlClientProvider-d9oaY35C.js — 200 — 499 B — 203 ms — h2https://rewordsai.app/assets/intl-recovery-boundary-D5jorRD5.js/assets/intl-recovery-boundary-D5jo... https://rewordsai.app/assets/intl-recovery-boundary-D5jorRD5.js — 200 — 1.0 KiB — 147 ms — h2https://rewordsai.app/assets/dist-BqFYcBMN.js/assets/dist-BqFYcBMN.js https://rewordsai.app/assets/dist-BqFYcBMN.js — 200 — 1.9 KiB — 236 ms — h2https://rewordsai.app/assets/auth-modal-provider-CpwWpPld.js/assets/auth-modal-provider-CpwWpPl... https://rewordsai.app/assets/auth-modal-provider-CpwWpPld.js — 200 — 1.7 KiB — 245 ms — h2https://rewordsai.app/assets/dynamic-JvjZAPEJ.js/assets/dynamic-JvjZAPEJ.js https://rewordsai.app/assets/dynamic-JvjZAPEJ.js — 200 — 1.3 KiB — 154 ms — h2https://rewordsai.app/assets/track-CUruYeSl.js/assets/track-CUruYeSl.js https://rewordsai.app/assets/track-CUruYeSl.js — 200 — 1.5 KiB — 254 ms — h2https://rewordsai.app/assets/promo-t9XhZ7QR.js/assets/promo-t9XhZ7QR.js https://rewordsai.app/assets/promo-t9XhZ7QR.js — 200 — 1.1 KiB — 254 ms — h2https://rewordsai.app/assets/login-promo-provider-Dcyz6WT7.js/assets/login-promo-provider-Dcyz6W... https://rewordsai.app/assets/login-promo-provider-Dcyz6WT7.js — 200 — 1.7 KiB — 251 ms — h2https://rewordsai.app/assets/client-sxLoWGEo.js/assets/client-sxLoWGEo.js https://rewordsai.app/assets/client-sxLoWGEo.js — 200 — 12.0 KiB — 139 ms — h2https://rewordsai.app/assets/rewords-device-7jIR_QxH.js/assets/rewords-device-7jIR_QxH.js https://rewordsai.app/assets/rewords-device-7jIR_QxH.js — 200 — 820 B — 207 ms — h2https://rewordsai.app/assets/pricing-modal-provider-Dr-ZEVfu.js/assets/pricing-modal-provider-Dr-Z... https://rewordsai.app/assets/pricing-modal-provider-Dr-ZEVfu.js — 200 — 3.7 KiB — 223 ms — h2https://rewordsai.app/assets/utils-DXalBF5w.js/assets/utils-DXalBF5w.js https://rewordsai.app/assets/utils-DXalBF5w.js — 200 — 8.8 KiB — 145 ms — h2https://rewordsai.app/assets/check-CX-FwU1S.js/assets/check-CX-FwU1S.js https://rewordsai.app/assets/check-CX-FwU1S.js — 200 — 420 B — 92 ms — h2https://rewordsai.app/assets/createLucideIcon-BRWvWrMn.js/assets/createLucideIcon-BRWvWrMn.j... https://rewordsai.app/assets/createLucideIcon-BRWvWrMn.js — 200 — 1.0 KiB — 244 ms — h2https://rewordsai.app/assets/loader-circle-Cxy4jRlv.js/assets/loader-circle-Cxy4jRlv.js https://rewordsai.app/assets/loader-circle-Cxy4jRlv.js — 200 — 466 B — 227 ms — h2https://rewordsai.app/assets/sparkles-DoLysNxV.js/assets/sparkles-DoLysNxV.js https://rewordsai.app/assets/sparkles-DoLysNxV.js — 200 — 596 B — 148 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 2.5 s LCP 2.9 shttps://rewordsai.app// https://rewordsai.app/ — 200 — 43.1 KiB — 199 ms — h2https://rewordsai.app/images/hero-menu-before-360.webp/images/hero-menu-before-360.webp https://rewordsai.app/images/hero-menu-before-360.webp — 200 — 26.3 KiB — 101 ms — h2https://rewordsai.app/assets/index-DnvjvXh-.css/assets/index-DnvjvXh-.css https://rewordsai.app/assets/index-DnvjvXh-.css — 200 — 30.2 KiB — 81 ms — h2https://rewordsai.app/assets/global-error-CVl8f3Cz.js/assets/global-error-CVl8f3Cz.js https://rewordsai.app/assets/global-error-CVl8f3Cz.js — 200 — 862 B — 83 ms — h2https://rewordsai.app/assets/framework-DJH1pfSr.js/assets/framework-DJH1pfSr.js https://rewordsai.app/assets/framework-DJH1pfSr.js — 200 — 59.7 KiB — 266 ms — h2https://rewordsai.app/assets/rolldown-runtime-QTnfLwEv.js/assets/rolldown-runtime-QTnfLwEv.j... https://rewordsai.app/assets/rolldown-runtime-QTnfLwEv.js — 200 — 728 B — 101 ms — h2https://rewordsai.app/assets/url-utils-BQKFb685.js/assets/url-utils-BQKFb685.js https://rewordsai.app/assets/url-utils-BQKFb685.js — 200 — 1.3 KiB — 174 ms — h2https://rewordsai.app/assets/error-BfKPhPMG.js/assets/error-BfKPhPMG.js https://rewordsai.app/assets/error-BfKPhPMG.js — 200 — 769 B — 233 ms — h2https://rewordsai.app/assets/navigation-S2zqLEkv.js/assets/navigation-S2zqLEkv.js https://rewordsai.app/assets/navigation-S2zqLEkv.js — 200 — 1.5 KiB — 249 ms — h2https://rewordsai.app/assets/react-DlbkFqaW.js/assets/react-DlbkFqaW.js https://rewordsai.app/assets/react-DlbkFqaW.js — 200 — 13.3 KiB — 231 ms — h2https://rewordsai.app/assets/BaseLink-2VVnD4hp.js/assets/BaseLink-2VVnD4hp.js https://rewordsai.app/assets/BaseLink-2VVnD4hp.js — 200 — 5.6 KiB — 254 ms — h2https://rewordsai.app/assets/locale-BQ4hC9K3.js/assets/locale-BQ4hC9K3.js https://rewordsai.app/assets/locale-BQ4hC9K3.js — 200 — 2.4 KiB — 84 ms — h2https://rewordsai.app/assets/react-client-CAjdHkmk.js/assets/react-client-CAjdHkmk.js https://rewordsai.app/assets/react-client-CAjdHkmk.js — 200 — 440 B — 208 ms — h2https://rewordsai.app/assets/layout-segment-context-B0vqr_nk.js/assets/layout-segment-context-B0vq... https://rewordsai.app/assets/layout-segment-context-B0vqr_nk.js — 200 — 515 B — 90 ms — h2https://rewordsai.app/assets/NextIntlClientProvider-d9oaY35C.js/assets/NextIntlClientProvider-d9oa... https://rewordsai.app/assets/NextIntlClientProvider-d9oaY35C.js — 200 — 499 B — 203 ms — h2https://rewordsai.app/assets/intl-recovery-boundary-D5jorRD5.js/assets/intl-recovery-boundary-D5jo... https://rewordsai.app/assets/intl-recovery-boundary-D5jorRD5.js — 200 — 1.0 KiB — 147 ms — h2https://rewordsai.app/assets/dist-BqFYcBMN.js/assets/dist-BqFYcBMN.js https://rewordsai.app/assets/dist-BqFYcBMN.js — 200 — 1.9 KiB — 236 ms — h2https://rewordsai.app/assets/auth-modal-provider-CpwWpPld.js/assets/auth-modal-provider-CpwWpPl... https://rewordsai.app/assets/auth-modal-provider-CpwWpPld.js — 200 — 1.7 KiB — 245 ms — h2https://rewordsai.app/assets/dynamic-JvjZAPEJ.js/assets/dynamic-JvjZAPEJ.js https://rewordsai.app/assets/dynamic-JvjZAPEJ.js — 200 — 1.3 KiB — 154 ms — h2https://rewordsai.app/assets/track-CUruYeSl.js/assets/track-CUruYeSl.js https://rewordsai.app/assets/track-CUruYeSl.js — 200 — 1.5 KiB — 254 ms — h2https://rewordsai.app/assets/promo-t9XhZ7QR.js/assets/promo-t9XhZ7QR.js https://rewordsai.app/assets/promo-t9XhZ7QR.js — 200 — 1.1 KiB — 254 ms — h2https://rewordsai.app/assets/login-promo-provider-Dcyz6WT7.js/assets/login-promo-provider-Dcyz6W... https://rewordsai.app/assets/login-promo-provider-Dcyz6WT7.js — 200 — 1.7 KiB — 251 ms — h2https://rewordsai.app/assets/client-sxLoWGEo.js/assets/client-sxLoWGEo.js https://rewordsai.app/assets/client-sxLoWGEo.js — 200 — 12.0 KiB — 139 ms — h2https://rewordsai.app/assets/rewords-device-7jIR_QxH.js/assets/rewords-device-7jIR_QxH.js 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
24% of JavaScript execution is third-party
First-party Third-party 547ms · 288KB · €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 278ms
Transfer 166 KB
Unused 43%
Monthly Cost €1/mo
Microsoft Clarity
Session Replay
Costly
Execution 205ms
Transfer 25 KB
Monthly Cost €1/mo
accounts.google.com
Other
Optional
Execution 63ms
Transfer 97 KB
Unused 75%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 278ms and costs ~€1/month
  • Microsoft Clarity adds 205ms and costs ~€1/month

Google Tag Manager takes 278ms 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

Microsoft Clarity takes 205ms 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

75% of accounts.google.com'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

How third-party costs are calculated

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-07-27 — 2026-08-23)

LCP (p75)

2708 ms

70% good

INP (p75)

223 ms

71% good

CLS (p75)

0.080

76% good

FCP (p75)

2542 ms

TTFB (p75)

0 ms

Image Optimization
12 images, 50 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

12

Total Size

50 KB

1 missing lazy loading
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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