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

100

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

831 ms

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

1.38 s

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

539 ms

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

0.009

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

1.89 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.

4.61 s

Page Load Progression

2.0 s

4.1 s

6.1 s

8.2 s

10.2 s

12.3 s

14.3 s

16.3 s

Checks

12 PASS 5 REVIEW 2 FIX

JS Execution Cost

Action

10034ms total JS execution

FIX

10034ms total JS execution

https://marketxy.com/: 6688ms CPU time

https://marketxy.com/_next/static/chunks/31255-070...: 1545ms CPU time

Unattributable: 470ms CPU time

https://marketxy.com/_next/static/chunks/52271efe-...: 442ms CPU time

https://marketxy.com/_next/static/chunks/4bd1b696-...: 309ms CPU time

Third-party scripts: 95ms (1% of total)

Main Thread Breakdown

Rendering 38% Other 24% Script Evaluation 23% Style & Layout 11%

Script	Total	Scripting	Parse/Compile	Party
https://marketxy.com/	6688ms	20ms	4ms	1st
https://marketxy.com/_next/static/chunks/31255-070f91cd6659c01a.js	1545ms	1069ms	5ms	1st
Unattributable	470ms	35ms	0ms	1st
https://marketxy.com/_next/static/chunks/52271efe-eefc201eaf5942c9.js	442ms	235ms	11ms	1st
https://marketxy.com/_next/static/chunks/4bd1b696-bad92808725a934a.js	309ms	133ms	6ms	1st
https://marketxy.com/lm38/ptiPfg0fCl2TkQR1JY37Eqex4onBO4OhEVk-2_vzkaBzf6eX	140ms	115ms	21ms	1st
https://marketxy.com/_next/static/chunks/c473e9eb-08d588f1e54e32c7.js	121ms	100ms	21ms	1st
https://marketxy.com/cdn-cgi/challenge-platform/scripts/jsd/main.js	108ms	104ms	1ms	1st
https://scripts.clarity.ms/0.8.67/clarity.js	95ms	76ms	3ms	3rd
https://marketxy.com/lm38/	59ms	46ms	13ms	1st

Showing top 10 of 11 scripts

JS Bundles

Action

64 scripts, 301 KB unused

FIX

64 scripts, 301 KB unused

https://www.googletagmanager.com/gtm.js?id=GTM-WTH...: 71 KB unused (64%)

Consider code splitting or tree shaking to reduce unused code.

https://marketxy.com/lm38/: 65 KB unused (52%)

Consider code splitting or tree shaking to reduce unused code.

https://marketxy.com/lm38/ptiPfg0fCl2TkQR1JY37Eqex...: 62 KB unused (32%)

Consider code splitting or tree shaking to reduce unused code.

https://marketxy.com/_next/static/chunks/73756-ad1...: 36 KB unused (90%)

Consider code splitting or tree shaking to reduce unused code.

https://marketxy.com/_next/static/chunks/52271efe-...: 34 KB unused (35%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 301 KB

301 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.googletagmanager.com/gtm.js?id=GTM-WTHKZGJN	112 KB	71 KB (64%)	✓	3rd
https://marketxy.com/lm38/	125 KB	65 KB (52%)	✓	1st
https://marketxy.com/lm38/ptiPfg0fCl2TkQR1JY37Eqex4onBO4OhEVk-2_vzkaBzf6eX	193 KB	62 KB (32%)	✓	1st
https://marketxy.com/_next/static/chunks/73756-ad1014597eeeb92c.js	40 KB	36 KB (90%)	✓	1st
https://marketxy.com/_next/static/chunks/52271efe-eefc201eaf5942c9.js	98 KB	34 KB (35%)	✓	1st
https://marketxy.com/_next/static/chunks/c473e9eb-08d588f1e54e32c7.js	116 KB	33 KB (29%)	✓	1st
https://www.clarity.ms/tag/vt23ur58hu?ref=gtm	1 KB	—	✓	3rd
https://marketxy.com/_next/static/chunks/48431-02d91ae0abd2513f.js	12 KB	—	✓	1st
https://marketxy.com/_next/static/chunks/31766-b88db4d2d47f9e85.js	4 KB	—	✓	1st
https://marketxy.com/_next/static/chunks/69b09407-00c3f7c23fba3ebe.js	5 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

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

Page Weight Budget

Action

1.9 MB transferred, 165 requests

REVIEW

1.9 MB transferred, 165 requests

Page weighs 6.8 MB (1.9 MB transferred)

JavaScript is 1.2 MB — consider code splitting or lazy loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Got: 1.2 MB

Fonts are 264 KB — consider subsetting or using system fonts

Subset fonts to include only used characters, or switch to system font stacks.

Got: 264 KB

165 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 0.40 g CO2 per page load

1.9 MB transferred

165 requests

0.40 g CO2 per page load

JavaScript 1.2 MiB 66%

Fonts 264.2 KiB 14%

Other 238.5 KiB 12%

CSS 66.3 KiB 3%

Other 38.9 KiB 2%

HTML 22.5 KiB 1%

Images 15.4 KiB 1%

Other 9.3 KiB 0%

Other 1.1 KiB 0%

0 2.4 MB 4.9 MB

Approaching limit

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

Image Optimization

6 images, 0 KB saveable

REVIEW

6 images, 0 KB saveable

https://storage.googleapis.com/docs-allheartweb-co... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

6 images 15 KB

0 oversized -0 KB

4 legacy format

1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Main HTML Cache-Control

Cache-Control present but without max-age

REVIEW

Cache-Control present but without max-age

Main HTML Cache-Control has no max-age: s-maxage=3600, stale-while-revalidate=31532400

Got: s-maxage=3600, stale-while-revalidate=31532400

Page Weight Inventory

Action

165 resources · 1.9 MB · 301 KB savings available

REVIEW

165 resources · 1.9 MB · 301 KB savings available

Page weight 1.9 MB exceeds 1 MB target by 908 KB

Got: 1.9 MB Expected: ≤ 1 MB

~301 KB of savings available

74 third-party resources (25% of weight)

1 resources over 200KB

165 resources · 1.9 MiB · 74 third-party 907.7 KiB over 1MB target

JavaScript 66% · 1.2 MiB

Other 14% · 279.7 KiB

Font 14% · 264.2 KiB

CSS 3% · 66.3 KiB

Image 1% · 23.2 KiB

Document 1% · 22.8 KiB

~300.9 KiB of savings available

Remove unused JavaScript: 300.9 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

165 resources			1.9 MiB

HTTP Caching

s-maxage=3600, stale-while-revalidate=31532400

REVIEW

s-maxage=3600, stale-while-revalidate=31532400

Cache-Control header is set

Got: s-maxage=3600, stale-while-revalidate=31532400

CDN TTL: 1 hour (s-maxage=3600)

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

s-maxage=3600, stale-while-revalidate=31532400

Directive	Value	Meaning
s-maxage	3600	CDN caches for 1 hour
stale-while-revalidate	31532400	Serve stale for 52 weeks while fetching fresh

Third-Party Impact

25% third-party, 0 ms blocking

PASS

25% third-party, 0 ms blocking

Third-party code accounts for 25% of page weight (480.5 KiB of 1.9 MiB)

Third-party blocking time is low (0 ms)

75%

25%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

12 fonts (264 KB)

PASS

12 fonts (264 KB)

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

Web fonts

264 KB total

Render-blocking

of 12

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

0b78ff376f6b9734-s.p.woff2 woff2 swap

Size 69 KB

Load time 125 ms

Start 516 ms