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https://theseocover.com

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
4
REVIEW
2
PASS
13
INFO
3

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

Mobile Desktop
49
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
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.
92
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.

900 ms

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

2.12 s

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

21.82 s

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

0.008

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

5.58 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.

32.98 s

Page Load Progression

5.3 s
10.7 s
16.0 s
21.3 s
26.7 s
32.0 s
37.3 s
42.7 s
Checks
22
13 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
5.1 MB transferred, 47 requests
FIX
5.1 MB transferred, 47 requests
Critical::
Page weighs 14.0 MB (5.1 MB transferred)
Warning::
Images are 4.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.1 MB
Info::
47 HTTP requests
Info::
Estimated 1.1 g CO2 per page load
5.1 MB / 2.4 MB budget
5.1 MB transferred
47 requests
1.1 g CO2 per page load
Images 4.1 MiB 81%
Other 553.8 KiB 11%
JavaScript 230.0 KiB 4%
HTML 161.8 KiB 3%
Fonts 59.7 KiB 1%
CSS 3.0 KiB 0%
Other 1.9 KiB 0%
Other 930 B 0%
Other 930 B 0%
Other 460 B 0%
0 2.4 MB 4.9 MB
Over budget

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

D
Third-Party Impact
Action
82% third-party, 0 ms blocking
FIX
82% third-party, 0 ms blocking
Warning::
Third-party code accounts for 82% of page weight (4.2 MiB of 5.1 MiB)
Info::
Third-party blocking time is low (0 ms)
18%
82%
First-party Third-party
F
JS Execution Cost
Action
35627ms total JS execution
FIX
35627ms total JS execution
Warning::
https://theseocover.com/polyfills-5CFQRCPP.js: 33105ms CPU time
Warning::
Unattributable: 1117ms CPU time
Warning::
https://theseocover.com/chunk-PTNTPL5X.js: 663ms CPU time
Warning::
https://theseocover.com/: 548ms CPU time
Info::
https://theseocover.com/chunk-HKWSKVEF.js: 194ms CPU time

Main Thread Breakdown

Other 87% Script Evaluation 11%
ScriptTotalScriptingParse/CompileParty
https://theseocover.com/polyfills-5CFQRCPP.js33105ms2632ms0ms1st
Unattributable1117ms386ms0ms1st
https://theseocover.com/chunk-PTNTPL5X.js663ms652ms0ms1st
https://theseocover.com/548ms3ms1ms1st
https://theseocover.com/chunk-HKWSKVEF.js194ms190ms0ms1st
D
Page Weight Inventory
Action
47 resources · 5.1 MB · 24 KB savings available
FIX
47 resources · 5.1 MB · 24 KB savings available
Warning::
Page weight 5.1 MB exceeds 1 MB target by 4.1 MB
Got: 5.1 MB Expected: ≤ 1 MB
Warning::
20 third-party resources (82% of weight)
Info::
6 resources over 200KB
47 resources · 5.1 MiB · 20 third-party 4.1 MiB over 1MB target
Image 81% · 4.1 MiB
Other 11% · 556.1 KiB
JavaScript 4% · 230.0 KiB
Document 3% · 162.2 KiB
Font 1% · 59.7 KiB
CSS 0% · 3.0 KiB

~23.7 KiB of savings available

Remove unused JavaScript: 23.7 KiB
B
Image Optimization
16 images, 0 KB saveable
REVIEW
16 images, 0 KB saveable
Info::
All images are well-optimized
16 images 4.1 MB
0 oversized -0 KB
13 legacy format
0 missing dimensions CLS risk
B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
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+
Font Loading
2 fonts (60 KB)
PASS
2 fonts (60 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

60 KB total

Render-blocking

0

of 2

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 900 ms LCP 2.1 shttps://fonts.gstatic.com/s/manrope/v20/xn7gYHE41ni1AdIRggexSg.woff2xn7gYHE41ni1AdIRggexSg.... https://fonts.gstatic.com/s/manrope/v20/xn7gYHE41ni1AdIRggexSg.woff2 — 24.3 KiB — 12 ms — font-display: swaphttps://fonts.gstatic.com/s/firacode/v27/uU9NCBsR6Z2vfE9aq3bh3dSD.woff2uU9NCBsR6Z2vfE9aq3bh3dS... https://fonts.gstatic.com/s/firacode/v27/uU9NCBsR6Z2vfE9aq3bh3dSD.woff2 — 35.5 KiB — 11 ms — font-display: swap
xn7gYHE41ni1AdIRggexSg.... woff2 swap
Size 24 KB
Load time 12 ms
Start 266 ms
Risk FOUT — text flashes from fallback to web font
uU9NCBsR6Z2vfE9aq3bh3dS... woff2 swap
Size 35 KB
Load time 11 ms
Start 266 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+
JS Bundles
15 scripts, 24 KB unused
PASS
15 scripts, 24 KB unused
Warning::
https://theseocover.com/chunk-HKWSKVEF.js: 24 KB unused (32%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 24 KB
24 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://theseocover.com/chunk-HKWSKVEF.js74 KB24 KB (32%)✓1st
https://theseocover.com/main-YKN2ZBY7.js17 KB—✓1st
https://theseocover.com/chunk-XWZJR4FP.js1 KB—✓1st
https://theseocover.com/chunk-IK3OFPV3.js8 KB—✓1st
https://theseocover.com/chunk-4CLCTAJ7.js1 KB—✓1st
https://theseocover.com/polyfills-5CFQRCPP.js13 KB—✓1st
https://theseocover.com/chunk-XYWWJDJG.js3 KB—✓1st
https://theseocover.com/chunk-DVDKC65N.js22 KB—✓1st
https://theseocover.com/chunk-PWQO5AB5.js22 KB—✓1st
https://theseocover.com/chunk-HVFDR7TH.js3 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

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+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, must-revalidate
A+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
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::
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+
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
47 requests over 4573ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 900 ms LCP 2.1 shttps://theseocover.com// https://theseocover.com/ — 200 — 161.8 KiB — 54 ms — h3https://huggingface.co/blog/assets/omlx/omlx-hf.jpghuggingface.co/blog/assets/omlx/oml... https://huggingface.co/blog/assets/omlx/omlx-hf.jpg — 200 — 123.9 KiB — 58 ms — h2https://theseocover.com/chunk-XYWWJDJG.js/chunk-XYWWJDJG.js https://theseocover.com/chunk-XYWWJDJG.js — 200 — 2.6 KiB — 27 ms — h3https://theseocover.com/chunk-IK3OFPV3.js/chunk-IK3OFPV3.js https://theseocover.com/chunk-IK3OFPV3.js — 200 — 8.1 KiB — 37 ms — h3https://theseocover.com/chunk-PWQO5AB5.js/chunk-PWQO5AB5.js https://theseocover.com/chunk-PWQO5AB5.js — 200 — 21.6 KiB — 60 ms — h3https://theseocover.com/chunk-HKWSKVEF.js/chunk-HKWSKVEF.js https://theseocover.com/chunk-HKWSKVEF.js — 200 — 74.4 KiB — 73 ms — h3https://theseocover.com/chunk-4CLCTAJ7.js/chunk-4CLCTAJ7.js https://theseocover.com/chunk-4CLCTAJ7.js — 200 — 1.0 KiB — 49 ms — h3https://theseocover.com/polyfills-5CFQRCPP.js/polyfills-5CFQRCPP.js https://theseocover.com/polyfills-5CFQRCPP.js — 200 — 13.5 KiB — 69 ms — h3https://theseocover.com/main-YKN2ZBY7.js/main-YKN2ZBY7.js https://theseocover.com/main-YKN2ZBY7.js — 200 — 17.1 KiB — 65 ms — h3https://theseocover.com/chunk-DVDKC65N.js/chunk-DVDKC65N.js https://theseocover.com/chunk-DVDKC65N.js — 200 — 21.8 KiB — 70 ms — h3https://theseocover.com/chunk-XWZJR4FP.js/chunk-XWZJR4FP.js https://theseocover.com/chunk-XWZJR4FP.js — 200 — 1.1 KiB — 68 ms — h3https://theseocover.com/chunk-HVFDR7TH.js/chunk-HVFDR7TH.js https://theseocover.com/chunk-HVFDR7TH.js — 200 — 3.1 KiB — 48 ms — h3https://theseocover.com/chunk-PL6FSERU.js/chunk-PL6FSERU.js https://theseocover.com/chunk-PL6FSERU.js — 200 — 1.5 KiB — 47 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495 — 200 — 10.1 KiB — 32 ms — h2https://theseocover.com/styles-VHF77SDV.css/styles-VHF77SDV.css https://theseocover.com/styles-VHF77SDV.css — 200 — 3.0 KiB — 61 ms — h3data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='…www.w3.org/2000/svg'%3E%3Cfilter id... data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='… — 200 — 0 B — 0 ms — datahttps://cdn.searchenginejournal.com/wp-content/uploads/2026/09/win-brand-624.pngcdn.searchenginejournal.com/wp-cont... https://cdn.searchenginejournal.com/wp-content/uploads/2026/09/win-brand-624.png — 200 — 15.4 KiB — 652 ms — h2https://www.marketingaiinstitute.com/hubfs/Pam%20Boiros.pngwww.marketingaiinstitute.com/hubfs/... https://www.marketingaiinstitute.com/hubfs/Pam%20Boiros.png — 200 — 53.9 KiB — 286 ms — h3https://static.semrush.com/blog/uploads/media/a4/64/a4644493cb03b67f92b47034d3d36a08/1b1a0104afa3841a54f401535688db9c/google-launches-ai-contribution-pilot.pngstatic.semrush.com/blog/uploads/med... https://static.semrush.com/blog/uploads/media/a4/64/a4644493cb03b67f92b47034d3d36a08/1b1a0104afa3841a54f401535688db9c/google-launches-ai-contribution-pilot.png — 200 — 48.3 KiB — 283 ms — h2https://res.cloudinary.com/dmukukwp6/image/upload/build_or_buy_db87a50b25.pngres.cloudinary.com/dmukukwp6/image/... https://res.cloudinary.com/dmukukwp6/image/upload/build_or_buy_db87a50b25.png — 200 — 52.5 KiB — 321 ms — h2https://www.nichepursuits.com/wp-content/uploads/2026/08/Ben-Borton-WP-920x575.jpgwww.nichepursuits.com/wp-content/up... https://www.nichepursuits.com/wp-content/uploads/2026/08/Ben-Borton-WP-920x575.jpg — 200 — 555.1 KiB — 138 ms — h3https://static.simonwillison.net/static/2026-09-20/IMG_8168.jpegstatic.simonwillison.net/static/202... https://static.simonwillison.net/static/2026-09-20/IMG_8168.jpeg — 200 — 117.6 KiB — 50 ms — h3https://s.w.org/images/core/emoji/17.0.2/72x72/1f4a1.pngs.w.org/images/core/emoji/17.0.2/72... https://s.w.org/images/core/emoji/17.0.2/72x72/1f4a1.png — 200 — 1.0 KiB — 39 ms — h2https://fonts.gstatic.com/s/manrope/v20/xn7gYHE41ni1AdIRggexSg.woff2fonts.gstatic.com/s/manrope/v20/xn7... https://fonts.gstatic.com/s/manrope/v20/xn7gYHE41ni1AdIRggexSg.woff2 — 200 — 24.3 KiB — 12 ms — h3https://fonts.gstatic.com/s/firacode/v27/uU9NCBsR6Z2vfE9aq3bh3dSD.woff2fonts.gstatic.com/s/firacode/v27/uU... https://fonts.gstatic.com/s/firacode/v27/uU9NCBsR6Z2vfE9aq3bh3dSD.woff2 — 200 — 35.5 KiB — 11 ms — h3https://theseocover.com/site.webmanifest/site.webmanifest https://theseocover.com/site.webmanifest — 200 — 930 B — 38 ms — h3https://theseocover.com/assets/data/resources.json/assets/data/resources.json https://theseocover.com/assets/data/resources.json — 200 — 551.5 KiB — 153 ms — h3https://theseocover.com/assets/data/resources.json/assets/data/resources.json https://theseocover.com/assets/data/resources.json — 200 — 552 B — 451 ms — h3https://theseocover.com/chunk-5EBV2OZH.js/chunk-5EBV2OZH.js https://theseocover.com/chunk-5EBV2OZH.js — 200 — 5.8 KiB — 26 ms — h3https://theseocover.com/chunk-AQ7UY2OY.js/chunk-AQ7UY2OY.js https://theseocover.com/chunk-AQ7UY2OY.js — 200 — 29.1 KiB — 43 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 900 ms LCP 2.1 shttps://theseocover.com// https://theseocover.com/ — 200 — 161.8 KiB — 54 ms — h3https://huggingface.co/blog/assets/omlx/omlx-hf.jpghuggingface.co/blog/assets/omlx/oml... https://huggingface.co/blog/assets/omlx/omlx-hf.jpg — 200 — 123.9 KiB — 58 ms — h2https://theseocover.com/chunk-XYWWJDJG.js/chunk-XYWWJDJG.js https://theseocover.com/chunk-XYWWJDJG.js — 200 — 2.6 KiB — 27 ms — h3https://theseocover.com/chunk-IK3OFPV3.js/chunk-IK3OFPV3.js https://theseocover.com/chunk-IK3OFPV3.js — 200 — 8.1 KiB — 37 ms — h3https://theseocover.com/chunk-PWQO5AB5.js/chunk-PWQO5AB5.js https://theseocover.com/chunk-PWQO5AB5.js — 200 — 21.6 KiB — 60 ms — h3https://theseocover.com/chunk-HKWSKVEF.js/chunk-HKWSKVEF.js https://theseocover.com/chunk-HKWSKVEF.js — 200 — 74.4 KiB — 73 ms — h3https://theseocover.com/chunk-4CLCTAJ7.js/chunk-4CLCTAJ7.js https://theseocover.com/chunk-4CLCTAJ7.js — 200 — 1.0 KiB — 49 ms — h3https://theseocover.com/polyfills-5CFQRCPP.js/polyfills-5CFQRCPP.js https://theseocover.com/polyfills-5CFQRCPP.js — 200 — 13.5 KiB — 69 ms — h3https://theseocover.com/main-YKN2ZBY7.js/main-YKN2ZBY7.js https://theseocover.com/main-YKN2ZBY7.js — 200 — 17.1 KiB — 65 ms — h3https://theseocover.com/chunk-DVDKC65N.js/chunk-DVDKC65N.js https://theseocover.com/chunk-DVDKC65N.js — 200 — 21.8 KiB — 70 ms — h3https://theseocover.com/chunk-XWZJR4FP.js/chunk-XWZJR4FP.js https://theseocover.com/chunk-XWZJR4FP.js — 200 — 1.1 KiB — 68 ms — h3https://theseocover.com/chunk-HVFDR7TH.js/chunk-HVFDR7TH.js https://theseocover.com/chunk-HVFDR7TH.js — 200 — 3.1 KiB — 48 ms — h3https://theseocover.com/chunk-PL6FSERU.js/chunk-PL6FSERU.js https://theseocover.com/chunk-PL6FSERU.js — 200 — 1.5 KiB — 47 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495 — 200 — 10.1 KiB — 32 ms — h2https://theseocover.com/styles-VHF77SDV.css/styles-VHF77SDV.css https://theseocover.com/styles-VHF77SDV.css — 200 — 3.0 KiB — 61 ms — h3data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='…www.w3.org/2000/svg'%3E%3Cfilter id... data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='… — 200 — 0 B — 0 ms — datahttps://cdn.searchenginejournal.com/wp-content/uploads/2026/09/win-brand-624.pngcdn.searchenginejournal.com/wp-cont... https://cdn.searchenginejournal.com/wp-content/uploads/2026/09/win-brand-624.png — 200 — 15.4 KiB — 652 ms — h2https://www.marketingaiinstitute.com/hubfs/Pam%20Boiros.pngwww.marketingaiinstitute.com/hubfs/... https://www.marketingaiinstitute.com/hubfs/Pam%20Boiros.png — 200 — 53.9 KiB — 286 ms — 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Image Optimization
27 images, 0 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

27

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0 KB

Oversized

3

26 missing alt text 27 missing dimensions 1 missing lazy loading
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