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

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.

9.91 s

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

23.08 s

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

12.38 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.

17.83 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.

51.08 s

Page Load Progression

708 ms

1.4 s

2.1 s

2.8 s

3.5 s

4.2 s

5.0 s

5.7 s

Checks

7 PASS 3 REVIEW 5 FIX

Page Weight Budget

Action

6.4 MB transferred, 228 requests

FIX

6.4 MB transferred, 228 requests

Page weighs 20.3 MB (6.4 MB transferred)

JavaScript is 4.3 MB — consider code splitting or lazy loading

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

Got: 4.3 MB

Images are 1.5 MB — compress or use modern formats

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

Got: 1.5 MB

Fonts are 235 KB — consider subsetting or using system fonts

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

Got: 235 KB

CSS is 204 KB — consider purging unused styles

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Got: 204 KB

228 HTTP requests — consider bundling or reducing

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

Estimated 1.3 g CO2 per page load

6.4 MB transferred

228 requests

1.3 g CO2 per page load

JavaScript 4.3 MiB 67%

Images 1.5 MiB 23%

Fonts 234.8 KiB 4%

CSS 203.5 KiB 3%

Other 91.8 KiB 1%

Other 53.0 KiB 1%

HTML 51.8 KiB 1%

Other 25.0 KiB 0%

Other 375 B 0%

Other 0 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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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 (6.4 MiB of 6.4 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

JS Execution Cost

Action

23583ms total JS execution

FIX

23583ms total JS execution

https://www.denverpost.com/_static/??-eJyVj8EKwjAQ...: 7461ms CPU time

https://cmp.osano.com/16A1AnRt2Fn8i1unj/1edc45d9-1...: 2929ms CPU time

https://www.denverpost.com/: 1905ms CPU time

Unattributable: 1584ms CPU time

https://cdn.p-n.io/pushly-sdk.min.js?domain_key=WZ...: 675ms CPU time

Third-party scripts: 23583ms (100% of total)

Main Thread Breakdown

Script Evaluation 77% Other 8% Style & Layout 6% Script Parsing & Compilation 5%

Script	Total	Scripting	Parse/Compile	Party
https://www.denverpost.com/_static/??-eJyVj8EKwjAQRH/IdlG07UU8ePHiR4QmNluT3dDdKPbrjYKiF8HjDPOYGbimqmdSRwrqXXQCxYlGmMCiKIwCLIZ4n0U51hGpHmUBH1gKeUASiDRUXsMbK/qg4chWflHJszKdMAS4OLI8QcJe8+Qe1n9gMPNNcHZffUh9yLbcKoueyzzz+ZXYxe2ybdfNqum6zXgHXmRkBw==	7461ms	7359ms	2ms	3rd
https://cmp.osano.com/16A1AnRt2Fn8i1unj/1edc45d9-1a78-48b2-9035-037b31df744a/osano.js	2929ms	2647ms	26ms	3rd
https://www.denverpost.com/	1905ms	298ms	16ms	3rd
Unattributable	1584ms	191ms	0ms	3rd
https://cdn.p-n.io/pushly-sdk.min.js?domain_key=WZUt8dwXwUZotnPfklpQcv7B2rwEoNFUnwAN&ver=6.9.4	675ms	581ms	12ms	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TLFP4R	657ms	575ms	66ms	3rd
https://cdn.adapex.io/hb/aaw.empowerlocal_c.js	589ms	539ms	45ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-9X3Z9L7GQJ&cx=c&gtm=4e64h1h1	514ms	384ms	40ms	3rd
https://connext-fd-gnbrate4fjhjb3f7.z01.azurefd.net/index.js	502ms	436ms	3ms	3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js	500ms	418ms	46ms	3rd

Showing top 10 of 45 scripts

JS Bundles

Action

107 scripts, 1.9 MB unused

FIX

107 scripts, 1.9 MB unused

https://engage.denverpost.com/prod/dfm/t8y9347t.mi...: 186 KB unused (64%)

Consider code splitting or tree shaking to reduce unused code.

https://securepubads.g.doubleclick.net/pagead/mana...: 129 KB unused (69%)

Consider code splitting or tree shaking to reduce unused code.

https://www.denverpost.com/_static/??-eJylzLEKgDAM...: 126 KB unused (81%)

Consider code splitting or tree shaking to reduce unused code.

https://prodmg2.blob.core.windows.net/newsletterwi...: 110 KB unused (77%)

Consider code splitting or tree shaking to reduce unused code.

https://cdn.adapex.io/hb/aaw.empowerlocal_c.js: 100 KB unused (60%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 1.9 MB

1935 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://engage.denverpost.com/prod/dfm/t8y9347t.min.js?2026321	292 KB	186 KB (64%)	✓	3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js	188 KB	129 KB (69%)	✓	3rd
https://www.denverpost.com/_static/??-eJylzLEKgDAMBNAf0gZFWhzE1d+oWkqkjWJS9POtk7jqdHDcPTi2clpJHAlsIXkkhki+nNEjp5GBxQpOr05Fi6TGRHNwauECvhj5QO6Uv0weowQXc/JfK+Fgb2B/oD52lTHatLrR9XIBv8ZxJw==	155 KB	126 KB (81%)	✓	3rd
https://prodmg2.blob.core.windows.net/newsletterwidget/mngcep/mg2nw.min.js	144 KB	110 KB (77%)	✓	3rd
https://cdn.adapex.io/hb/aaw.empowerlocal_c.js	169 KB	100 KB (60%)	✓	3rd
https://cds.connatix.com/p/320810193/connatix.player.js	139 KB	95 KB (68%)	✓	3rd
https://www.denverpost.com/_static/??-eJzTLy/QTc7PK0nNK9EvyClNz8wr1s/NS9dNyUzPLC5NKtYvLkksyUxGEdNLLAIK5aQGZyQWpeolleal5KTqZRXr6FNiVmIZklH2ubaG5uZm5pZmJmZGWQApJTzP	127 KB	95 KB (75%)	✓	3rd
https://htlbid.com/v3/denverpost.com/htlbid.js?ver=6.9.4	137 KB	81 KB (59%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=G-WGJ1CSMGXM&l=MG2DL&cx=c&gtm=4e64h1h1	161 KB	77 KB (48%)	✓	3rd
https://accounts.google.com/gsi/client?ver=6.9.4	96 KB	72 KB (75%)	✓	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

228 resources · 6.4 MB · 1.9 MB savings available

FIX

228 resources · 6.4 MB · 1.9 MB savings available

Page weight 5.4 MB over 1MB target

Got: 6.4 MB Expected: ≤ 1 MB

~1.9 MB of savings available

227 third-party resources (100% of weight)

4 resources over 200KB

228 resources · 6.4 MiB · 227 third-party 5.4 MiB over 1MB target

JavaScript 67% · 4.3 MiB

Image 23% · 1.5 MiB

Font 4% · 234.8 KiB

CSS 3% · 203.5 KiB

Other 3% · 164.7 KiB

Document 1% · 52.5 KiB

~1.9 MiB of savings available

Remove unused JavaScript: 1.9 MiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

228 resources			6.4 MiB

Image Optimization

Action

44 images, 0 KB saveable

REVIEW

44 images, 0 KB saveable

https://www.denverpost.com/wp-content/uploads/2026... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

44 images 1.5 MB

0 oversized -0 KB

33 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

Performance issues directly impact user engagement and conversion rates.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

HTTP Caching

private

REVIEW

private

Cache-Control header is set

Got: private

No ETag or Last-Modified header

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

Cache-Control

private

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

7 fonts (235 KB)

PASS

7 fonts (235 KB)

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

Web fonts

235 KB total

Render-blocking

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

truetype;base64,AAEAAAA... unknown swap

Size 32 KB

Load time 73 ms

Start 3.9 s

Risk FOUT — text flashes from fallback to web font

o-0bIpQlx3QUlC5A4PNB6Ry... woff2 swap

Size 35 KB

Load time 53 ms

Start 4.0 s

Risk FOUT — text flashes from fallback to web font

bootstrap-icons.woff2 woff2 swap

Size 89 KB

Load time 7 ms

Start 4.0 s

Risk FOUT — text flashes from fallback to web font

ga6daw1J5X9T9RW6j9bNVls... woff2 swap

Size 36 KB

Load time 53 ms

Start 4.0 s

Risk FOUT — text flashes from fallback to web font

icomoon.woff woff swap

Size 2 KB

Load time 4 ms

Start 5.1 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

KFOmCnqEu92Fr1Mu4mxP.ttf ttf swap

Size 20 KB

Load time 25 ms

Start 5.1 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

KFOlCnqEu92Fr1MmWUlfBBc... ttf swap

Size 20 KB

Load time 25 ms

Start 5.2 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

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)

Fixing the unchecked items could save ~23 KB and ~46 ms

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

15 hints, 0 missing preconnects

PASS

15 hints, 0 missing preconnects

Page uses 15 resource hint(s)

Current Resource Hints

preconnect

preload

dns-prefetch

prefetch

—

15 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

228 requests over 10973ms

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 23583ms · 3583KB · $135/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
www.denverpost.com www.denverpost.com	Other	7461ms	10 KB	—	$43/mo	Costly
cmp.osano.com cmp.osano.com	Other	2929ms	63 KB	—	$17/mo	Costly
www.denverpost.com www.denverpost.com	Other	1905ms	49 KB	—	$11/mo	Costly
Unattributable Unattributable	Other	1584ms	0 KB	—	$9/mo	Costly
cdn.p-n.io cdn.p-n.io	Other	675ms	0 KB	—	$4/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	657ms	213 KB	26%	$4/mo	Costly
cdn.adapex.io cdn.adapex.io	Other	589ms	169 KB	60%	$3/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	514ms	175 KB	38%	$3/mo	Costly
connext-fd-gnbrate4fjhjb3f7.z01.azurefd.net connext-fd-gnbrate4fjhjb3f7.z01.azurefd.net	Other	502ms	3 KB	—	$3/mo	Costly
securepubads.g.doubleclick.net securepubads.g.doubleclick.net	Other	500ms	188 KB	69%	$3/mo	Costly
c.amazon-adsystem.com c.amazon-adsystem.com	Other	451ms	91 KB	42%	$3/mo	Costly
www.denverpost.com www.denverpost.com	Other	406ms	155 KB	81%	$2/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	369ms	171 KB	38%	$2/mo	Costly
htlbid.com htlbid.com	Other	326ms	137 KB	59%	$2/mo	Costly
fundingchoicesmessages.google.com fundingchoicesmessages.google.com	Other	325ms	70 KB	53%	$2/mo	Costly
engage.denverpost.com engage.denverpost.com	Other	301ms	292 KB	64%	$2/mo	Costly
s.cdn.gcprivacy.net s.cdn.gcprivacy.net	Other	296ms	9 KB	—	$2/mo	Costly
tagan.adlightning.com tagan.adlightning.com	Other	277ms	15 KB	—	$2/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	218ms	144 KB	50%	$1/mo	Costly
cdn.sophi.io cdn.sophi.io	Other	216ms	40 KB	—	$1/mo	Costly
raven-static.aditude.io raven-static.aditude.io	Other	216ms	107 KB	59%	$1/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	212ms	145 KB	40%	$1/mo	Costly
jsDelivr cdn.jsdelivr.net	CDN	197ms	81 KB	47%	$1/mo	Optional
www.denverpost.com www.denverpost.com	Other	182ms	21 KB	—	$1/mo	Optional
fp.denverpost.com fp.denverpost.com	Other	177ms	23 KB	—	$1/mo	Optional
Google Tag Manager www.googletagmanager.com	Tag Manager	176ms	161 KB	48%	$1/mo	Optional
tagan.adlightning.com tagan.adlightning.com	Other	172ms	31 KB	—	$1/mo	Optional
az416426.vo.msecnd.net az416426.vo.msecnd.net	Other	169ms	22 KB	—	$1/mo	Optional
securepubads.g.doubleclick.net securepubads.g.doubleclick.net	Other	158ms	34 KB	69%	$1/mo	Optional
cds.connatix.com cds.connatix.com	Other	140ms	139 KB	68%	$1/mo	Optional
medianewsgroup.blueconic.net medianewsgroup.blueconic.net	Other	115ms	1 KB	—	$1/mo	Optional
sdk.mrf.io sdk.mrf.io	Other	114ms	63 KB	39%	$1/mo	Optional
www.denverpost.com www.denverpost.com	Other	104ms	127 KB	75%	$1/mo	Optional
Google Tag Manager www.googletagmanager.com	Tag Manager	103ms	145 KB	45%	$1/mo	Optional
c615.denverpost.com c615.denverpost.com	Other	99ms	4 KB	—	$1/mo	Optional
www.denverpost.com www.denverpost.com	Other	98ms	66 KB	77%	$1/mo	Optional
cdn-p.cityspark.com cdn-p.cityspark.com	Other	96ms	22 KB	—	$1/mo	Optional
tagan.adlightning.com tagan.adlightning.com	Other	87ms	72 KB	—	$0/mo	Optional
g2i.denverpost.com g2i.denverpost.com	Other	81ms	44 KB	50%	$0/mo	Optional
thebestpaints.com thebestpaints.com	Other	78ms	36 KB	—	$0/mo	Optional
www.denverpost.com www.denverpost.com	Other	71ms	122 KB	—	$0/mo	Optional
cds.connatix.com cds.connatix.com	Other	65ms	1 KB	—	$0/mo	Optional
c615.denverpost.com c615.denverpost.com	Other	64ms	49 KB	—	$0/mo	Optional
raven-static.aditude.io raven-static.aditude.io	Other	56ms	6 KB	—	$0/mo	Optional
fundingchoicesmessages.google.com fundingchoicesmessages.google.com	Other	52ms	68 KB	—	$0/mo	Optional

www.denverpost.com

Other

Costly

Execution 7461ms

Transfer 10 KB

Monthly Cost $43/mo

cmp.osano.com

Other

Costly

Execution 2929ms

Transfer 63 KB

Monthly Cost $17/mo

www.denverpost.com

Other

Costly

Execution 1905ms

Transfer 49 KB

Monthly Cost $11/mo

Unattributable

Other

Costly

Execution 1584ms

Transfer 0 KB

Monthly Cost $9/mo

cdn.p-n.io

Other

Costly

Execution 675ms

Transfer 0 KB

Monthly Cost $4/mo

Google Tag Manager

Tag Manager

Costly

Execution 657ms

Transfer 213 KB

Unused 26%

Monthly Cost $4/mo

cdn.adapex.io

Other

Costly

Execution 589ms

Transfer 169 KB

Unused 60%

Monthly Cost $3/mo

Google Tag Manager

Tag Manager

Costly

Execution 514ms

Transfer 175 KB

Unused 38%

Monthly Cost $3/mo

connext-fd-gnbrate4fjhjb3f7.z01.azurefd.net

Other

Costly

Execution 502ms

Transfer 3 KB

Monthly Cost $3/mo

securepubads.g.doubleclick.net

Other

Costly

Execution 500ms

Transfer 188 KB

Unused 69%

Monthly Cost $3/mo

c.amazon-adsystem.com

Other

Costly

Execution 451ms

Transfer 91 KB

Unused 42%

Monthly Cost $3/mo

www.denverpost.com

Other

Costly

Execution 406ms

Transfer 155 KB

Unused 81%

Monthly Cost $2/mo

Google Tag Manager

Tag Manager

Costly

Execution 369ms

Transfer 171 KB

Unused 38%

Monthly Cost $2/mo

htlbid.com

Other

Costly

Execution 326ms

Transfer 137 KB

Unused 59%

Monthly Cost $2/mo

fundingchoicesmessages.google.com

Other

Costly

Execution 325ms

Transfer 70 KB

Unused 53%

Monthly Cost $2/mo

engage.denverpost.com

Other

Costly

Execution 301ms

Transfer 292 KB

Unused 64%

Monthly Cost $2/mo

s.cdn.gcprivacy.net

Other

Costly

Execution 296ms

Transfer 9 KB

Monthly Cost $2/mo

tagan.adlightning.com

Other

Costly

Execution 277ms

Transfer 15 KB

Monthly Cost $2/mo

Google Tag Manager

Tag Manager

Costly

Execution 218ms

Transfer 144 KB

Unused 50%

Monthly Cost $1/mo

cdn.sophi.io

Other

Costly

Execution 216ms

Transfer 40 KB

Monthly Cost $1/mo

raven-static.aditude.io

Other

Costly

Execution 216ms

Transfer 107 KB

Unused 59%

Monthly Cost $1/mo

Google Tag Manager

Tag Manager

Costly

Execution 212ms

Transfer 145 KB

Unused 40%

Monthly Cost $1/mo

jsDelivr

CDN

Optional

Execution 197ms

Transfer 81 KB

Unused 47%

Monthly Cost $1/mo

www.denverpost.com

Other

Optional

Execution 182ms

Transfer 21 KB

Monthly Cost $1/mo

fp.denverpost.com

Other

Optional

Execution 177ms

Transfer 23 KB

Monthly Cost $1/mo

Google Tag Manager

Tag Manager

Optional

Execution 176ms

Transfer 161 KB

Unused 48%

Monthly Cost $1/mo

tagan.adlightning.com

Other

Optional

Execution 172ms

Transfer 31 KB

Monthly Cost $1/mo

az416426.vo.msecnd.net

Other

Optional

Execution 169ms

Transfer 22 KB

Monthly Cost $1/mo

securepubads.g.doubleclick.net

Other

Optional

Execution 158ms

Transfer 34 KB

Unused 69%

Monthly Cost $1/mo

cds.connatix.com

Other

Optional

Execution 140ms

Transfer 139 KB

Unused 68%

Monthly Cost $1/mo

medianewsgroup.blueconic.net

Other

Optional

Execution 115ms

Transfer 1 KB

Monthly Cost $1/mo

sdk.mrf.io

Other

Optional

Execution 114ms

Transfer 63 KB

Unused 39%

Monthly Cost $1/mo

www.denverpost.com

Other

Optional

Execution 104ms

Transfer 127 KB

Unused 75%

Monthly Cost $1/mo

Google Tag Manager

Tag Manager

Optional

Execution 103ms

Transfer 145 KB

Unused 45%

Monthly Cost $1/mo

c615.denverpost.com

Other

Optional

Execution 99ms

Transfer 4 KB

Monthly Cost $1/mo

www.denverpost.com

Other

Optional

Execution 98ms

Transfer 66 KB

Unused 77%

Monthly Cost $1/mo

cdn-p.cityspark.com

Other

Optional

Execution 96ms

Transfer 22 KB

Monthly Cost $1/mo

tagan.adlightning.com

Other

Optional

Execution 87ms

Transfer 72 KB

Monthly Cost $0/mo

g2i.denverpost.com

Other

Optional

Execution 81ms

Transfer 44 KB

Unused 50%

Monthly Cost $0/mo

thebestpaints.com

Other

Optional

Execution 78ms

Transfer 36 KB

Monthly Cost $0/mo

www.denverpost.com

Other

Optional

Execution 71ms

Transfer 122 KB

Monthly Cost $0/mo

cds.connatix.com

Other

Optional

Execution 65ms

Transfer 1 KB

Monthly Cost $0/mo

c615.denverpost.com

Other

Optional

Execution 64ms

Transfer 49 KB

Monthly Cost $0/mo

raven-static.aditude.io

Other

Optional

Execution 56ms

Transfer 6 KB

Monthly Cost $0/mo

fundingchoicesmessages.google.com

Other

Optional

Execution 52ms

Transfer 68 KB

Monthly Cost $0/mo

These scripts may cost more than they're worth

www.denverpost.com adds 7461ms and costs ~$43/month
cmp.osano.com adds 2929ms and costs ~$17/month
www.denverpost.com adds 1905ms and costs ~$11/month
Unattributable adds 1584ms and costs ~$9/month
cdn.p-n.io adds 675ms and costs ~$4/month
Google Tag Manager adds 657ms and costs ~$4/month
cdn.adapex.io adds 589ms and costs ~$3/month
Google Tag Manager adds 514ms and costs ~$3/month
connext-fd-gnbrate4fjhjb3f7.z01.azurefd.net adds 502ms and costs ~$3/month
securepubads.g.doubleclick.net adds 500ms and costs ~$3/month
c.amazon-adsystem.com adds 451ms and costs ~$3/month
www.denverpost.com adds 406ms and costs ~$2/month
Google Tag Manager adds 369ms and costs ~$2/month
htlbid.com adds 326ms and costs ~$2/month
fundingchoicesmessages.google.com adds 325ms and costs ~$2/month
engage.denverpost.com adds 301ms and costs ~$2/month
s.cdn.gcprivacy.net adds 296ms and costs ~$2/month
tagan.adlightning.com adds 277ms and costs ~$2/month
Google Tag Manager adds 218ms and costs ~$1/month
cdn.sophi.io adds 216ms and costs ~$1/month
raven-static.aditude.io adds 216ms and costs ~$1/month
Google Tag Manager adds 212ms and costs ~$1/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.denverpost.com takes 7461ms 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.osano.com takes 2929ms 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.denverpost.com takes 1905ms 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 1584ms 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

cdn.p-n.io takes 675ms 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 657ms 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

cdn.adapex.io takes 589ms 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

60% of cdn.adapex.io'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

Google Tag Manager takes 514ms 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

connext-fd-gnbrate4fjhjb3f7.z01.azurefd.net takes 502ms 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 500ms 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

69% of securepubads.g.doubleclick.net'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

c.amazon-adsystem.com takes 451ms 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.denverpost.com takes 406ms 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

81% of www.denverpost.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

Google Tag Manager takes 369ms 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

htlbid.com takes 326ms 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

59% of htlbid.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

fundingchoicesmessages.google.com takes 325ms 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 fundingchoicesmessages.google.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

engage.denverpost.com takes 301ms 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

64% of engage.denverpost.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

s.cdn.gcprivacy.net takes 296ms 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

tagan.adlightning.com takes 277ms 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 218ms 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

cdn.sophi.io takes 216ms 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

raven-static.aditude.io takes 216ms 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

59% of raven-static.aditude.io'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

Google Tag Manager takes 212ms 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

69% of securepubads.g.doubleclick.net'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

68% of cds.connatix.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

75% of www.denverpost.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

77% of www.denverpost.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

50% of g2i.denverpost.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.