Performance

· 15 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

SEO

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

1.14 s

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

3.67 s

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

198 ms

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

0.022

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

4.25 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.

13.47 s

Page Load Progression

386 ms

772 ms

1.2 s

1.5 s

1.9 s

2.3 s

2.7 s

3.1 s

Checks

5 PASS 2 REVIEW 6 FIX

Page Weight Budget

Action

9.9 MB transferred, 408 requests

FIX

9.9 MB transferred, 408 requests

Page weighs 27.6 MB (9.9 MB transferred)

JavaScript is 2.4 MB — consider code splitting or lazy loading

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

Got: 2.4 MB

Images are 1.2 MB — compress or use modern formats

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Got: 1.2 MB

Fonts are 424 KB — consider subsetting or using system fonts

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

Got: 424 KB

408 HTTP requests — consider bundling or reducing

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

Estimated 2.1 g CO2 per page load

9.9 MB transferred

408 requests

2.1 g CO2 per page load

Other 5.0 MiB 51%

JavaScript 2.4 MiB 25%

Images 1.2 MiB 12%

HTML 575.1 KiB 6%

Fonts 423.8 KiB 4%

Other 87.0 KiB 1%

CSS 86.4 KiB 1%

Other 27.5 KiB 0%

Other 37 B 0%

0 2.4 MB 4.9 MB

Over 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

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

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

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (9.8 MiB of 9.9 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

JS Execution Cost

Action

2830ms total JS execution

FIX

2830ms total JS execution

https://www.billboard.com/: 718ms CPU time

Unattributable: 362ms CPU time

https://cds.connatix.com/p/320810193/player.user.m...: 330ms CPU time

https://cdn.tinypass.com/api/tinypass.min.js: 194ms CPU time

https://cds.connatix.com/p/320810193/player.lit.ui...: 181ms CPU time

Third-party scripts: 2830ms (100% of total)

Main Thread Breakdown

Script Evaluation 61% Other 16% Style & Layout 9% Script Parsing & Compilation 6% Parse HTML & CSS 3%

Script	Total	Scripting	Parse/Compile	Party
https://www.billboard.com/	718ms	364ms	10ms	3rd
Unattributable	362ms	33ms	0ms	3rd
https://cds.connatix.com/p/320810193/player.user.manager.service.js	330ms	279ms	7ms	3rd
https://cdn.tinypass.com/api/tinypass.min.js	194ms	136ms	10ms	3rd
https://cds.connatix.com/p/320810193/player.lit.ui.js	181ms	137ms	5ms	3rd
https://cdn.confiant-integrations.net/video/202603241056/wrap.js	123ms	114ms	8ms	3rd
https://cds.connatix.com/p/320810193/connatix.player.js?cid=1ffe63de-eb53-11e9-b4d2-06948452ae1a	123ms	71ms	12ms	3rd
https://imasdk.googleapis.com/js/sdkloader/ima3.js	110ms	85ms	9ms	3rd
https://api.b2c.com/api/init-605420mses66u90ksh2.js	99ms	96ms	0ms	3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604090102/pubads_impl.js?cb=31097906	93ms	66ms	12ms	3rd

Showing top 10 of 17 scripts

JS Bundles

Action

232 scripts, 1.1 MB unused

FIX

232 scripts, 1.1 MB unused

https://securepubads.g.doubleclick.net/pagead/mana...: 140 KB unused (75%)

Consider code splitting or tree shaking to reduce unused code.

https://ads.blogherads.com/static/chunks/5273.eec6...: 106 KB unused (80%)

Consider code splitting or tree shaking to reduce unused code.

https://imasdk.googleapis.com/js/sdkloader/ima3.js: 97 KB unused (66%)

Consider code splitting or tree shaking to reduce unused code.

https://cds.connatix.com/p/320810193/player.ads.js: 73 KB unused (77%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtag/js?id=G-DJBC...: 71 KB unused (42%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 1.1 MB

1094 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604090102/pubads_impl.js?cb=31097906	188 KB	140 KB (75%)	✓	3rd
https://ads.blogherads.com/static/chunks/5273.eec6f62e6c9beefc4be4.js	132 KB	106 KB (80%)	✓	3rd
https://imasdk.googleapis.com/js/sdkloader/ima3.js	146 KB	97 KB (66%)	✓	3rd
https://cds.connatix.com/p/320810193/player.ads.js	95 KB	73 KB (77%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=G-DJBCNPKNBT&cx=c&gtm=4e64h1	169 KB	71 KB (42%)	✓	3rd
https://cdn.confiant-integrations.net/video/202603241056/wrap.js	125 KB	70 KB (56%)	✓	3rd
https://cdn.tinypass.com/api/tinypass.min.js	133 KB	69 KB (52%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=AW-608454122&cx=c&gtm=4e64h1	144 KB	65 KB (45%)	✓	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MD3ZLS	144 KB	62 KB (43%)	✓	3rd
https://cds.connatix.com/p/320810193/connatix.player.js?cid=1ffe63de-eb53-11e9-b4d2-06948452ae1a	139 KB	49 KB (35%)	✓	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

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 Inventory

Action

408 resources · 9.9 MB · 1.1 MB savings available

FIX

408 resources · 9.9 MB · 1.1 MB savings available

Page weight 8.9 MB over 1MB target

Got: 9.9 MB Expected: ≤ 1 MB

~1.1 MB of savings available

387 third-party resources (100% of weight)

5 resources over 200KB

408 resources · 9.9 MiB · 387 third-party 8.9 MiB over 1MB target

Media 50% · 5.0 MiB

JavaScript 26% · 2.5 MiB

Image 12% · 1.2 MiB

Document 6% · 575.2 KiB

Font 4% · 423.8 KiB

CSS 1% · 86.4 KiB

Other 1% · 72.9 KiB

~1.1 MiB of savings available

Remove unused JavaScript: 1.1 MiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

408 resources			9.9 MiB

HTTP Caching

Action

No cache headers

FIX

No cache headers

No Cache-Control header found

Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

Image Optimization

Action

27 images, 0 KB saveable

REVIEW

27 images, 0 KB saveable

https://www.billboard.com/wp-content/themes/vip/pm... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://cdn.shopify.com/s/files/1/0237/2843/produc... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

27 images 1.1 MB

0 oversized -0 KB

15 legacy format

2 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

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

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

17 fonts (424 KB)

PASS

17 fonts (424 KB)

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

Web fonts

424 KB total

Render-blocking

of 17

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

Crystal-Book.woff2 woff2 swap

Size 39 KB

Load time 20 ms

Start 514 ms