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https://lingora-dca55.web.app/?utm_source=chatgpt.com

Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
1
REVIEW
4
PASS
18
INFO
4

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.
98
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

1.82 s

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

1.85 s

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

4 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.

1.82 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.

3.48 s

Page Load Progression

485 ms
970 ms
1.5 s
1.9 s
2.4 s
2.9 s
3.4 s
3.9 s
Checks
27
18 PASS 4 REVIEW 1 FIX
D
Third-Party Impact
Action
61% third-party, 0 ms blocking
FIX
61% third-party, 0 ms blocking
Warning::
Third-party code accounts for 61% of page weight (387.7 KiB of 633.6 KiB)
Info::
Third-party blocking time is low (0 ms)
39%
61%
First-party Third-party
C
JS Execution Cost
Action
1072ms total JS execution
REVIEW
1072ms total JS execution
Warning::
Unattributable: 481ms CPU time
Warning::
https://lingora-dca55.web.app/assets/index-Pq24XwV...: 269ms CPU time
Info::
https://lingora-dca55.web.app/?utm_source=chatgpt....: 249ms CPU time
Info::
https://apis.google.com/_/scs/abc-static/_/js/k=ga...: 73ms CPU time
Info::
Third-party scripts: 73ms (7% of total)

Main Thread Breakdown

Other 52% Script Evaluation 33% Style & Layout 11%
ScriptTotalScriptingParse/CompileParty
Unattributable481ms51ms0ms1st
https://lingora-dca55.web.app/assets/index-Pq24XwV8.js269ms224ms2ms1st
https://lingora-dca55.web.app/?utm_source=chatgpt.com249ms3ms1ms1st
https://apis.google.com/_/scs/abc-static/_/js/k=gapi.lb.en.etOqPKhAhvg.O/m=gapi_iframes/rt=j/sv=1/d=1/ed=1/rs=AHpOoo-l5JrVgGKVELwC844E6riBHX86-w/cb=gapi.loaded_0?le=scs73ms62ms7ms3rd
B
JS Bundles
6 scripts, 126 KB unused
REVIEW
6 scripts, 126 KB unused
Warning::
https://lingora-dca55.web.app/assets/index-Pq24XwV...: 80 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://lingora-dca55.web.app/assets/index.esm-DFg...: 25 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://lingora-dca55.web.app/assets/index.esm-Dn7...: 22 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 126 KB
126 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://lingora-dca55.web.app/assets/index-Pq24XwV8.js172 KB80 KB (48%)✓1st
https://lingora-dca55.web.app/assets/index.esm-DFgqwu2u.js33 KB25 KB (76%)✓1st
https://lingora-dca55.web.app/assets/index.esm-Dn7f_x5r.js31 KB22 KB (73%)✓1st
https://apis.google.com/js/api.js?onload=__iframefcb6066546 KB—✓3rd
https://apis.google.com/_/scs/abc-static/_/js/k=gapi.lb.en.etOqPKhAhvg.O/m=gapi_iframes/rt=j/sv=1/d=1/ed=1/rs=AHpOoo-l5JrVgGKVELwC844E6riBHX86-w/cb=gapi.loaded_0?le=scs35 KB—✓3rd
https://lingora-dca55.firebaseapp.com/__/auth/iframe.js93 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

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
Main HTML Cache-Control
Main HTML max-age=3600 (~60min)
REVIEW
Main HTML max-age=3600 (~60min)
Info::
Main HTML cached for 60 minutes -- mild staleness risk
Got: max-age=3600
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
634 KB transferred, 17 requests
PASS
634 KB transferred, 17 requests
Info::
Page weighs 1.8 MB (634 KB transferred)
Info::
17 HTTP requests
Info::
Estimated 0.13 g CO2 per page load
634 KB / 2.4 MB budget
634 KB transferred
17 requests
0.13 g CO2 per page load
JavaScript 369.5 KiB 58%
Images 252.2 KiB 40%
CSS 8.3 KiB 1%
Other 1.5 KiB 0%
HTML 1.1 KiB 0%
Other 580 B 0%
Other 389 B 0%
Other 0 B 0%
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
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Info::
All images are well-optimized
2 images 252 KB
0 oversized -0 KB
1 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: x-fh-requested-host, 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::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
A
Page Weight Inventory
17 resources · 634 KB · 126 KB savings available
PASS
17 resources · 634 KB · 126 KB savings available
Info::
Within 1MB page-weight target
Got: 634 KB
Info::
~126 KB of savings available
Warning::
11 third-party resources (61% of weight)
Info::
1 resources over 200KB
17 resources · 633.6 KiB · 11 third-party Within 1MB page-weight target
JavaScript 58% · 369.5 KiB
Image 40% · 253.7 KiB
CSS 1% · 8.3 KiB
Document 0% · 1.1 KiB
Other 0% · 969 B

~126.4 KiB of savings available

Remove unused JavaScript: 126.4 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: Fastly

A+
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
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
17 requests over 1895ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.8 s LCP 1.8 shttps://lingora-dca55.web.app/?utm_source=chatgpt.com/?utm_source=chatgpt.com https://lingora-dca55.web.app/?utm_source=chatgpt.com — 200 — 549 B — 8 ms — h2https://lingora-dca55.web.app/assets/index-Pq24XwV8.js/assets/index-Pq24XwV8.js https://lingora-dca55.web.app/assets/index-Pq24XwV8.js — 200 — 172.2 KiB — 152 ms — h2https://lingora-dca55.web.app/assets/index-Cqn1zDky.css/assets/index-Cqn1zDky.css https://lingora-dca55.web.app/assets/index-Cqn1zDky.css — 200 — 8.3 KiB — 182 ms — h2data:image/svg+xml,%3csvg%20width='740'%20height='620'%20viewBox='0%200%20740%20620'%20fill='none'%…data:image/svg+xml,%3csvg%20width='... data:image/svg+xml,%3csvg%20width='740'%20height='620'%20viewBox='0%200%20740%20620'%20fill='none'%… — 200 — 0 B — 0 ms — datahttps://lingora-dca55.web.app/assets/index.esm-DFgqwu2u.js/assets/index.esm-DFgqwu2u.js https://lingora-dca55.web.app/assets/index.esm-DFgqwu2u.js — 200 — 32.8 KiB — 112 ms — h3https://lingora-dca55.web.app/assets/index.esm-Dn7f_x5r.js/assets/index.esm-Dn7f_x5r.js https://lingora-dca55.web.app/assets/index.esm-Dn7f_x5r.js — 200 — 30.6 KiB — 219 ms — h3https://lingora-dca55.web.app/favicon.svg/favicon.svg https://lingora-dca55.web.app/favicon.svg — 200 — 1.5 KiB — 44 ms — h3https://firestore.googleapis.com/v1/projects/lingora-dca55/databases/(default)/documents:batchGet?key=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JIfirestore.googleapis.com/v1/project... https://firestore.googleapis.com/v1/projects/lingora-dca55/databases/(default)/documents:batchGet?key=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JI — 200 — 0 B — 604 ms — h2https://apis.google.com/js/api.js?onload=__iframefcb606654apis.google.com/js/api.js?onload=__... https://apis.google.com/js/api.js?onload=__iframefcb606654 — 200 — 6.3 KiB — 174 ms — h2https://apis.google.com/_/scs/abc-static/_/js/k=gapi.lb.en.etOqPKhAhvg.O/m=gapi_iframes/rt=j/sv=1/d=1/ed=1/rs=AHpOoo-l5JrVgGKVELwC844E6riBHX86-w/cb=gapi.loaded_0?le=scsapis.google.com/_/scs/abc-static/_/... https://apis.google.com/_/scs/abc-static/_/js/k=gapi.lb.en.etOqPKhAhvg.O/m=gapi_iframes/rt=j/sv=1/d=1/ed=1/rs=AHpOoo-l5JrVgGKVELwC844E6riBHX86-w/cb=gapi.loaded_0?le=scs — 200 — 34.7 KiB — 66 ms — h2https://lingora-dca55.firebaseapp.com/__/auth/iframe?apiKey=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JI&appName=%5BDEFAULT%5D&v=13.2.0&eid=p&usegapi=1&jsh=m%3B%2F_%2Fscs%2Fabc-static%2F_%2Fjs%2Fk%3Dgapi.lb.en.etOqPKhAhvg.O%2Fd%3D1%2Frs%3DAHpOoo-l5JrVgGKVELwC844E6riBHX86-w%2Fm%3D__features__lingora-dca55.firebaseapp.com/__/au... https://lingora-dca55.firebaseapp.com/__/auth/iframe?apiKey=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JI&appName=%5BDEFAULT%5D&v=13.2.0&eid=p&usegapi=1&jsh=m%3B%2F_%2Fscs%2Fabc-static%2F_%2Fjs%2Fk%3Dgapi.lb.en.etOqPKhAhvg.O%2Fd%3D1%2Frs%3DAHpOoo-l5JrVgGKVELwC844E6riBHX86-w%2Fm%3D__features__ — 200 — 567 B — 255 ms — h2https://firestore.googleapis.com/v1/projects/lingora-dca55/databases/(default)/documents:batchGet?key=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JIfirestore.googleapis.com/v1/project... https://firestore.googleapis.com/v1/projects/lingora-dca55/databases/(default)/documents:batchGet?key=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JI — 200 — 580 B — 230 ms — h2https://lingora-dca55.firebaseapp.com/__/auth/iframe.jslingora-dca55.firebaseapp.com/__/au... https://lingora-dca55.firebaseapp.com/__/auth/iframe.js — 200 — 93.1 KiB — 476 ms — h2https://i.postimg.cc/KjgqDb83/Glossy-Violet-Lightning-Bolt-Icon.pngi.postimg.cc/KjgqDb83/Glossy-Violet... https://i.postimg.cc/KjgqDb83/Glossy-Violet-Lightning-Bolt-Icon.png — 200 — 252.2 KiB — 303 ms — h2https://i.postimg.cc/KjgqDb83/Glossy-Violet-Lightning-Bolt-Icon.pngi.postimg.cc/KjgqDb83/Glossy-Violet... https://i.postimg.cc/KjgqDb83/Glossy-Violet-Lightning-Bolt-Icon.png — 200 — 0 B — 302 ms — h2https://www.googleapis.com/identitytoolkit/v3/relyingparty/getProjectConfig?key=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JI&cb=1794633995621www.googleapis.com/identitytoolkit/... https://www.googleapis.com/identitytoolkit/v3/relyingparty/getProjectConfig?key=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JI&cb=1794633995621 — 200 — 0 B — 175 ms — h2https://www.googleapis.com/identitytoolkit/v3/relyingparty/getProjectConfig?key=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JI&cb=1794633995621www.googleapis.com/identitytoolkit/... https://www.googleapis.com/identitytoolkit/v3/relyingparty/getProjectConfig?key=AIzaSyDxrBI5NNPPE3Epdnk1IGv3oUpAlDNy6JI&cb=1794633995621 — 200 — 389 B — 146 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
7% of JavaScript execution is third-party
First-party Third-party 73ms · 35KB · $1/mo
apis.google.com
Other
Optional
Execution 73ms
Transfer 35 KB
Monthly Cost $1/mo

How third-party costs are calculated

Image Optimization
2 images, 0 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

2

Total Size

0 KB

Oversized

2

2 missing dimensions 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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