Performance

· 17 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

100

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.

4.68 s

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

11.35 s

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

3.24 s

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.

7.30 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.

17.73 s

Page Load Progression

681 ms

1.4 s

2.0 s

2.7 s

3.4 s

4.1 s

4.8 s

5.4 s

Checks

7 PASS 2 REVIEW 6 FIX

Page Weight Budget

Action

3.7 MB transferred, 119 requests

FIX

3.7 MB transferred, 119 requests

Page weighs 8.1 MB (3.7 MB transferred)

JavaScript is 1.3 MB — consider code splitting or lazy loading

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

Got: 1.3 MB

119 HTTP requests — consider bundling or reducing

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

Estimated 0.78 g CO2 per page load

3.7 MB transferred

119 requests

0.78 g CO2 per page load

Other 1.7 MiB 47%

JavaScript 1.3 MiB 34%

Images 273.1 KiB 7%

Fonts 158.0 KiB 4%

HTML 104.5 KiB 3%

Other 103.5 KiB 3%

Other 70.5 KiB 2%

Other 26.5 KiB 1%

CSS 1.3 KiB 0%

Other 808 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

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 (3.7 MiB of 3.7 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

JS Execution Cost

Action

14011ms total JS execution

FIX

14011ms total JS execution

https://www.bustle.com/: 4626ms CPU time

Unattributable: 1293ms CPU time

https://pagead2.googlesyndication.com/pagead/manag...: 1216ms CPU time

https://securepubads.g.doubleclick.net/pagead/mana...: 1147ms CPU time

https://d15kdpgjg3unno.cloudfront.net/oPS.js: 1013ms CPU time

Third-party scripts: 14011ms (100% of total)

Main Thread Breakdown

Script Evaluation 45% Other 25% Style & Layout 17% Rendering 6% Script Parsing & Compilation 5%

Script	Total	Scripting	Parse/Compile	Party
https://www.bustle.com/	4626ms	11ms	4ms	3rd
Unattributable	1293ms	103ms	0ms	3rd
https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js	1216ms	841ms	161ms	3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097946	1147ms	952ms	69ms	3rd
https://d15kdpgjg3unno.cloudfront.net/oPS.js	1013ms	952ms	55ms	3rd
https://cdn2.bustle.com/2026/bustle/HubPage-b8764176d1.js	997ms	686ms	17ms	3rd
https://cdn.doubleverify.com/dvbm.js	701ms	569ms	48ms	3rd
https://cmp.inmobi.com/tcfv2/61/cmp2.js?referer=www.bustle.com	476ms	366ms	58ms	3rd
https://www.googletagservices.com/dcm/impl_v106.js	357ms	187ms	7ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-C3PETV5ZL1	349ms	287ms	58ms	3rd

Showing top 10 of 23 scripts

JS Bundles

Action

36 scripts, 467 KB unused

FIX

36 scripts, 467 KB unused

https://securepubads.g.doubleclick.net/pagead/mana...: 83 KB unused (45%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtag/js?id=G-C3PE...: 65 KB unused (38%)

Consider code splitting or tree shaking to reduce unused code.

https://cmp.inmobi.com/tcfv2/61/cmp2.js?referer=ww...: 64 KB unused (48%)

Consider code splitting or tree shaking to reduce unused code.

https://cdn2.bustle.com/2026/bustle/prebid-light-4...: 43 KB unused (47%)

Consider code splitting or tree shaking to reduce unused code.

https://cdn.doubleverify.com/dvbm.js: 39 KB unused (38%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 467 KB

467 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097946	187 KB	83 KB (45%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=G-C3PETV5ZL1	168 KB	65 KB (38%)	✓	3rd
https://cmp.inmobi.com/tcfv2/61/cmp2.js?referer=www.bustle.com	133 KB	64 KB (48%)	✓	3rd
https://cdn2.bustle.com/2026/bustle/prebid-light-4eb2a90476.js	93 KB	43 KB (47%)	✓	3rd
https://cdn.doubleverify.com/dvbm.js	102 KB	39 KB (38%)	✓	3rd
https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js	0 KB	31 KB (42%)	✓	3rd
https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js	73 KB	31 KB (42%)	✓	3rd
https://cdn.id5-sync.com/api/1.0/esp.js	35 KB	31 KB (89%)	✓	3rd
https://cdn2.bustle.com/2026/bustle/main-2a88bb4eb4.js	74 KB	28 KB (39%)	✓	3rd
https://cdn2.bustle.com/2026/bustle/HubPage-b8764176d1.js	54 KB	28 KB (53%)	✓	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

119 resources · 3.7 MB · 467 KB savings available

FIX

119 resources · 3.7 MB · 467 KB savings available

Page weight 2.7 MB over 1MB target

Got: 3.7 MB Expected: ≤ 1 MB

~467 KB of savings available

118 third-party resources (100% of weight)

1 resources over 200KB

119 resources · 3.7 MiB · 118 third-party 2.7 MiB over 1MB target

Media 47% · 1.7 MiB

JavaScript 36% · 1.3 MiB

Image 7% · 275.4 KiB

Font 4% · 158.0 KiB

Other 4% · 144.5 KiB

Document 3% · 104.7 KiB

CSS 0% · 1.3 KiB

~467.1 KiB of savings available

Remove unused JavaScript: 467.1 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

119 resources			3.7 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

29 images, 0 KB saveable

REVIEW

29 images, 0 KB saveable

All images are well-optimized

29 images 273 KB

0 oversized -0 KB

23 legacy format

0 missing dimensions CLS risk

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

8 fonts (158 KB)

PASS

8 fonts (158 KB)

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

Web fonts

158 KB total

Render-blocking

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

untitled-sans-web-regul... woff2 swap

Size 24 KB

Load time 39 ms

Start 95 ms

Risk FOUT — text flashes from fallback to web font

untitled-sans-web-mediu... woff2 swap

Size 24 KB

Load time 50 ms

Start 97 ms

Risk FOUT — text flashes from fallback to web font

untitled-serif-web-regu... woff2 swap

Size 30 KB

Load time 53 ms

Start 98 ms

Risk FOUT — text flashes from fallback to web font

Acta-Medium-5cc5ca97b9.... woff2 swap

Size 15 KB

Load time 66 ms

Start 98 ms

Risk FOUT — text flashes from fallback to web font

untitled-serif-web-bold... woff2 swap

Size 30 KB

Load time 6 ms

Start 253 ms

Risk FOUT — text flashes from fallback to web font

untitled-sans-web-regul... woff2 swap

Size 24 KB

Load time 8 ms

Start 254 ms

Risk FOUT — text flashes from fallback to web font

EmberModernDisplayStd-B... woff2 swap

Size 7 KB

Load time 14 ms

Start 3.1 s

Risk FOUT — text flashes from fallback to web font

EmberModernDisplayStd-R... woff2 swap

Size 4 KB

Load time 18 ms

Start 3.1 s

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+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

12 hints, 0 missing preconnects

PASS

12 hints, 0 missing preconnects

Page uses 12 resource hint(s)

Current Resource Hints

preconnect

preload

dns-prefetch

—

prefetch

—

12 resource hints configured

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

Network Waterfall

119 requests over 5339ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

100% of JavaScript execution is third-party

First-party Third-party 14011ms · 1202KB · €152/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
www.bustle.com www.bustle.com	Other	4626ms	80 KB	—	€50/mo	Costly
Unattributable Unattributable	Other	1293ms	0 KB	—	€14/mo	Costly
pagead2.googlesyndication.com pagead2.googlesyndication.com	Other	1216ms	0 KB	42%	€13/mo	Costly
securepubads.g.doubleclick.net securepubads.g.doubleclick.net	Other	1147ms	187 KB	45%	€12/mo	Costly
d15kdpgjg3unno.cloudfront.net d15kdpgjg3unno.cloudfront.net	Other	1013ms	60 KB	40%	€11/mo	Costly
cdn2.bustle.com cdn2.bustle.com	Other	997ms	54 KB	53%	€11/mo	Costly
cdn.doubleverify.com cdn.doubleverify.com	Other	701ms	102 KB	38%	€8/mo	Costly
cmp.inmobi.com cmp.inmobi.com	Other	476ms	133 KB	48%	€5/mo	Costly
www.googletagservices.com www.googletagservices.com	Other	357ms	26 KB	—	€4/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	349ms	168 KB	38%	€4/mo	Costly
cdn2.bustle.com cdn2.bustle.com	Other	302ms	74 KB	39%	€3/mo	Costly
cdn2.bustle.com cdn2.bustle.com	Other	262ms	93 KB	47%	€3/mo	Costly
s0.2mdn.net s0.2mdn.net	Other	221ms	41 KB	—	€2/mo	Costly
cdn2.bustle.com cdn2.bustle.com	Other	204ms	12 KB	—	€2/mo	Costly
tps.doubleverify.com tps.doubleverify.com	Other	123ms	1 KB	—	€1/mo	Optional
ad.doubleclick.net ad.doubleclick.net	Other	118ms	38 KB	—	€1/mo	Optional
carbon-cdn.ccgateway.net carbon-cdn.ccgateway.net	Other	118ms	13 KB	—	€1/mo	Optional
securepubads.g.doubleclick.net securepubads.g.doubleclick.net	Other	106ms	34 KB	—	€1/mo	Optional
cdn.id5-sync.com cdn.id5-sync.com	Other	101ms	35 KB	89%	€1/mo	Optional
ep2.adtrafficquality.google ep2.adtrafficquality.google	Other	85ms	8 KB	—	€1/mo	Optional
ep2.adtrafficquality.google ep2.adtrafficquality.google	Other	70ms	14 KB	—	€1/mo	Optional
secure.quantserve.com secure.quantserve.com	Other	65ms	12 KB	—	€1/mo	Optional
link.rubiconproject.com link.rubiconproject.com	Other	61ms	15 KB	—	€1/mo	Optional

www.bustle.com

Other

Costly

Execution 4626ms

Transfer 80 KB

Monthly Cost €50/mo

Unattributable

Other

Costly

Execution 1293ms

Transfer 0 KB

Monthly Cost €14/mo

pagead2.googlesyndication.com

Other

Costly

Execution 1216ms

Transfer 0 KB

Unused 42%

Monthly Cost €13/mo

securepubads.g.doubleclick.net

Other

Costly

Execution 1147ms

Transfer 187 KB

Unused 45%

Monthly Cost €12/mo

d15kdpgjg3unno.cloudfront.net

Other

Costly

Execution 1013ms

Transfer 60 KB

Unused 40%

Monthly Cost €11/mo

cdn2.bustle.com

Other

Costly

Execution 997ms

Transfer 54 KB

Unused 53%

Monthly Cost €11/mo

cdn.doubleverify.com

Other

Costly

Execution 701ms

Transfer 102 KB

Unused 38%

Monthly Cost €8/mo

cmp.inmobi.com

Other

Costly

Execution 476ms

Transfer 133 KB

Unused 48%

Monthly Cost €5/mo

www.googletagservices.com

Other

Costly

Execution 357ms

Transfer 26 KB

Monthly Cost €4/mo

Google Tag Manager

Tag Manager

Costly

Execution 349ms

Transfer 168 KB

Unused 38%

Monthly Cost €4/mo

cdn2.bustle.com

Other

Costly

Execution 302ms

Transfer 74 KB

Unused 39%

Monthly Cost €3/mo

cdn2.bustle.com

Other

Costly

Execution 262ms

Transfer 93 KB

Unused 47%

Monthly Cost €3/mo

s0.2mdn.net

Other

Costly

Execution 221ms

Transfer 41 KB

Monthly Cost €2/mo

cdn2.bustle.com

Other

Costly

Execution 204ms

Transfer 12 KB

Monthly Cost €2/mo

tps.doubleverify.com

Other

Optional

Execution 123ms

Transfer 1 KB

Monthly Cost €1/mo

ad.doubleclick.net

Other

Optional

Execution 118ms

Transfer 38 KB

Monthly Cost €1/mo

carbon-cdn.ccgateway.net

Other

Optional

Execution 118ms

Transfer 13 KB

Monthly Cost €1/mo

securepubads.g.doubleclick.net

Other

Optional

Execution 106ms

Transfer 34 KB

Monthly Cost €1/mo

cdn.id5-sync.com

Other

Optional

Execution 101ms

Transfer 35 KB

Unused 89%

Monthly Cost €1/mo

ep2.adtrafficquality.google

Other

Optional

Execution 85ms

Transfer 8 KB

Monthly Cost €1/mo

ep2.adtrafficquality.google

Other

Optional

Execution 70ms

Transfer 14 KB

Monthly Cost €1/mo

secure.quantserve.com

Other

Optional

Execution 65ms

Transfer 12 KB

Monthly Cost €1/mo

link.rubiconproject.com

Other

Optional

Execution 61ms

Transfer 15 KB

Monthly Cost €1/mo

These scripts may cost more than they're worth

www.bustle.com adds 4626ms and costs ~€50/month
Unattributable adds 1293ms and costs ~€14/month
pagead2.googlesyndication.com adds 1216ms and costs ~€13/month
securepubads.g.doubleclick.net adds 1147ms and costs ~€12/month
d15kdpgjg3unno.cloudfront.net adds 1013ms and costs ~€11/month
cdn2.bustle.com adds 997ms and costs ~€11/month
cdn.doubleverify.com adds 701ms and costs ~€8/month
cmp.inmobi.com adds 476ms and costs ~€5/month
www.googletagservices.com adds 357ms and costs ~€4/month
Google Tag Manager adds 349ms and costs ~€4/month
cdn2.bustle.com adds 302ms and costs ~€3/month
cdn2.bustle.com adds 262ms and costs ~€3/month
s0.2mdn.net adds 221ms and costs ~€2/month
cdn2.bustle.com adds 204ms and costs ~€2/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.bustle.com takes 4626ms 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

Unattributable takes 1293ms 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

pagead2.googlesyndication.com takes 1216ms 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

securepubads.g.doubleclick.net takes 1147ms 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

d15kdpgjg3unno.cloudfront.net takes 1013ms 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

cdn2.bustle.com takes 997ms 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

53% of cdn2.bustle.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

cdn.doubleverify.com takes 701ms 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

cmp.inmobi.com takes 476ms 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

www.googletagservices.com takes 357ms 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

Google Tag Manager takes 349ms 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

cdn2.bustle.com takes 302ms 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

cdn2.bustle.com takes 262ms 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

s0.2mdn.net takes 221ms 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

cdn2.bustle.com takes 204ms 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

89% of cdn.id5-sync.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

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.