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https://seattle.gov

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
2
REVIEW
5
PASS
8
INFO
2

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

Mobile Desktop
43
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
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.
100
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.

4.43 s

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

10.33 s

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

824 ms

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.

5.45 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.

10.37 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
8 PASS 5 REVIEW 2 FIX
D
JS Execution Cost
Action
3230ms total JS execution
FIX
3230ms total JS execution
Warning::
https://seattle.gov/: 772ms CPU time
Warning::
https://seattle.gov/cms_resources/js/Subsetter/fon...: 491ms CPU time
Warning::
Unattributable: 380ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CGFR...: 371ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PXQ...: 336ms CPU time
Info::
Third-party scripts: 1411ms (44% of total)

Main Thread Breakdown

Script Evaluation 49% Other 22% Style & Layout 15% Script Parsing & Compilation 6% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://seattle.gov/772ms10ms2ms1st
https://seattle.gov/cms_resources/js/Subsetter/fontawesome.min.js491ms367ms4ms1st
Unattributable380ms15ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CGFRM1LP6G&cx=c&gtm=4e64k0371ms304ms39ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PXQBQ2336ms287ms45ms3rd
https://seattle.gov/cms_resources/js/Subsetter/solid.min.js259ms74ms27ms1st
https://seattle.gov/cms_resources/pe/sea-global.js247ms230ms1ms1st
https://translate.googleapis.com/_/translate_http/_/js/k=translate_http.tr.es.eNjH1Jo6ldQ.O/am=AAAAAQ/d=1/exm=el_conf/ed=1/rs=AN8SPfq_osd-q7vwQm5aouAQRZibUmx4sg/m=el_main164ms120ms36ms3rd
https://siteimproveanalytics.com/js/siteanalyze_15203573.js91ms31ms14ms3rd
https://cdn.jwplayer.com/libraries/Ctujouh4.js?exp=1776894828464&sig=4a311810a7c0f24b36764c004f5296f369ms52ms15ms3rd

Showing top 10 of 11 scripts

D
JS Bundles
Action
15 scripts, 311 KB unused
FIX
15 scripts, 311 KB unused
Warning::
https://translate.googleapis.com/_/translate_http/...: 94 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CGFR...: 65 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PXQ...: 64 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.jwplayer.com/libraries/Ctujouh4.js?exp...: 44 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://siteimproveanalytics.com/js/siteanalyze_15...: 23 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 311 KB
311 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://translate.googleapis.com/_/translate_http/_/js/k=translate_http.tr.es.eNjH1Jo6ldQ.O/am=AAAAAQ/d=1/exm=el_conf/ed=1/rs=AN8SPfq_osd-q7vwQm5aouAQRZibUmx4sg/m=el_main119 KB94 KB (79%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CGFRM1LP6G&cx=c&gtm=4e64k0160 KB65 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PXQBQ2160 KB64 KB (40%)✓3rd
https://cdn.jwplayer.com/libraries/Ctujouh4.js?exp=1776894828464&sig=4a311810a7c0f24b36764c004f5296f366 KB44 KB (66%)✓3rd
https://siteimproveanalytics.com/js/siteanalyze_15203573.js32 KB23 KB (75%)✓3rd
https://seattle.gov/cms_resources/pe/sea-global.js62 KB22 KB (36%)✓1st
https://seattle.gov/cms_resources/js/Subsetter/regular.min.js10 KB—✓1st
https://seattle.gov/cms_resources/js/Subsetter/light.min.js19 KB—✓1st
https://seattle.gov/cms_resources/js/Subsetter/brands.min.js7 KB—✓1st
https://seattle.gov/cms_resources/js/Subsetter/solid.min.js100 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

B
Page Weight Budget
1.2 MB transferred, 39 requests
REVIEW
1.2 MB transferred, 39 requests
Info::
Page weighs 3.2 MB (1.2 MB transferred)
Warning::
JavaScript is 794 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 794 KB
Info::
39 HTTP requests
Info::
Estimated 0.26 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
39 requests
0.26 g CO2 per page load
JavaScript 794.3 KiB 64%
Images 217.6 KiB 17%
Fonts 134.7 KiB 11%
Other 36.9 KiB 3%
Other 29.5 KiB 2%
CSS 27.3 KiB 2%
HTML 10.6 KiB 1%
0 2.4 MB 4.9 MB
Under 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

B
Third-Party Impact
51% third-party, 0 ms blocking
REVIEW
51% third-party, 0 ms blocking
Warning::
Third-party code accounts for 51% of page weight (636.5 KiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
49%
51%
First-party Third-party
B
Image Optimization
9 images, 0 KB saveable
REVIEW
9 images, 0 KB saveable
Info::
All images are well-optimized
9 images 218 KB
0 oversized -0 KB
9 legacy format
0 missing dimensions CLS risk
C
Page Weight Inventory
Action
39 resources · 1.2 MB · 311 KB savings available
REVIEW
39 resources · 1.2 MB · 311 KB savings available
Warning::
Page weight 227 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~311 KB of savings available
Warning::
19 third-party resources (51% of weight)
39 resources · 1.2 MiB · 19 third-party 226.9 KiB over 1MB target
JavaScript 64% · 794.3 KiB
Image 20% · 254.4 KiB
Font 11% · 134.7 KiB
Other 2% · 29.5 KiB
CSS 2% · 27.3 KiB
Document 1% · 10.6 KiB

~311.0 KiB of savings available

Remove unused JavaScript: 311.0 KiB
C
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
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
2 fonts (135 KB)
PASS
2 fonts (135 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

135 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 4.4 s LCP 10.3 shttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.0 KiB — 46 ms — font-display: swaphttps://seattle.gov/cms_resources/pe/SeattleText-Bold-V3.woffSeattleText-Bold-V3.woff https://seattle.gov/cms_resources/pe/SeattleText-Bold-V3.woff — 92.7 KiB — 302 ms — font-display: swap
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 46 ms
Start 766 ms
Risk FOUT — text flashes from fallback to web font
SeattleText-Bold-V3.woff woff swap
Size 93 KB
Load time 302 ms
Start 766 ms
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 ~28 KB and ~56 ms

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+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: public, max-age=300
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=300

DirectiveValueMeaning
public—Any cache may store this response
max-age300Cache for 5 minutes
Effective TTL: 300 seconds
Network Waterfall
39 requests over 2240ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 4.4 s LCP 10.3 shttps://seattle.gov// https://seattle.gov/ — 200 — 10.6 KiB — 63 ms — h2https://fonts.googleapis.com/css?family=Open+Sans:400,700,800,600,300fonts.googleapis.com/css?family=Ope... https://fonts.googleapis.com/css?family=Open+Sans:400,700,800,600,300 — 200 — 2.3 KiB — 94 ms — h2https://seattle.gov/cms_resources/js/Subsetter/fontawesome.min.js/cms_resources/js/Subsetter/fontawe... https://seattle.gov/cms_resources/js/Subsetter/fontawesome.min.js — 200 — 15.7 KiB — 26 ms — h2https://www.trumba.com/scripts/spuds.jswww.trumba.com/scripts/spuds.js https://www.trumba.com/scripts/spuds.js — 200 — 12.5 KiB — 552 ms — http/1.1https://cdn.jwplayer.com/libraries/Ctujouh4.js?exp=1776894828464&sig=4a311810a7c0f24b36764c004f5296f3cdn.jwplayer.com/libraries/Ctujouh4... https://cdn.jwplayer.com/libraries/Ctujouh4.js?exp=1776894828464&sig=4a311810a7c0f24b36764c004f5296f3 — 200 — 66.2 KiB — 230 ms — h2https://seattle.gov/cms_resources/pe/sea-global.css/cms_resources/pe/sea-global.css https://seattle.gov/cms_resources/pe/sea-global.css — 200 — 20.4 KiB — 569 ms — h2https://seattle.gov/cms_resources/pe/sea-global.js/cms_resources/pe/sea-global.js https://seattle.gov/cms_resources/pe/sea-global.js — 200 — 61.5 KiB — 983 ms — h2https://seattle.gov/cms_resources/js/siteimprove_analytics.js/cms_resources/js/siteimprove_analy... https://seattle.gov/cms_resources/js/siteimprove_analytics.js — 200 — 829 B — 26 ms — h2https://seattle.gov/cms_resources/js/Subsetter/solid.min.js/cms_resources/js/Subsetter/solid.m... https://seattle.gov/cms_resources/js/Subsetter/solid.min.js — 200 — 100.4 KiB — 44 ms — h2https://seattle.gov/cms_resources/js/Subsetter/regular.min.js/cms_resources/js/Subsetter/regular... https://seattle.gov/cms_resources/js/Subsetter/regular.min.js — 200 — 10.2 KiB — 47 ms — h2https://seattle.gov/cms_resources/js/Subsetter/light.min.js/cms_resources/js/Subsetter/light.m... https://seattle.gov/cms_resources/js/Subsetter/light.min.js — 200 — 18.6 KiB — 50 ms — h2https://seattle.gov/cms_resources/js/Subsetter/brands.min.js/cms_resources/js/Subsetter/brands.... https://seattle.gov/cms_resources/js/Subsetter/brands.min.js — 200 — 6.8 KiB — 49 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-PXQBQ2www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-PXQBQ2 — 200 — 159.8 KiB — 179 ms — h2https://siteimproveanalytics.com/js/siteanalyze_15203573.jssiteimproveanalytics.com/js/siteana... https://siteimproveanalytics.com/js/siteanalyze_15203573.js — 200 — 31.5 KiB — 123 ms — h3https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2fonts.gstatic.com/s/opensans/v44/me... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 200 — 42.0 KiB — 46 ms — h3https://seattle.gov/cms_resources/pe/SeattleText-Bold-V3.woff/cms_resources/pe/SeattleText-Bold-... https://seattle.gov/cms_resources/pe/SeattleText-Bold-V3.woff — 200 — 92.7 KiB — 302 ms — h2https://www.googletagmanager.com/gtag/js?id=G-CGFRM1LP6G&cx=c&gtm=4e64k0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-CGFRM1LP6G&cx=c&gtm=4e64k0 — 200 — 160.0 KiB — 69 ms — h2https://www.google.com/ccm/collect?rcb=9&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fseattle.gov%2F&scrsrc=www.googletagmanager.com&rnd=1446699606.1776895011&dt=Seattle.gov%20Home&auid=1882585136.1776895011&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He64k0v71205398za200zd71205398xea&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115616985~115938466~115938468~117266401~117884344&apve=1&apvf=f&apvc=1&tft=1776895011501&tfd=917www.google.com/ccm/collect?rcb=9&fr... https://www.google.com/ccm/collect?rcb=9&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fseattle.gov%2F&scrsrc=www.googletagmanager.com&rnd=1446699606.1776895011&dt=Seattle.gov%20Home&auid=1882585136.1776895011&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He64k0v71205398za200zd71205398xea&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115616985~115938466~115938468~117266401~117884344&apve=1&apvf=f&apvc=1&tft=1776895011501&tfd=917 — 200 — 21 B — 166 ms — h3https://15203573.global.siteimproveanalytics.io/image.aspx?url=https%3A%2F%2Fseattle.gov%2F&title=Seattle.gov%20Home&res=412x823&accountid=15203573&rt=808&prev=b80eec5b-89ec-3430-3ef9-6d920c92a9e5&luid=c0f5c88d-dd89-ba1f-325a-0ee8fbea34dd&rnd=2710715203573.global.siteimproveanalytic... https://15203573.global.siteimproveanalytics.io/image.aspx?url=https%3A%2F%2Fseattle.gov%2F&title=Seattle.gov%20Home&res=412x823&accountid=15203573&rt=808&prev=b80eec5b-89ec-3430-3ef9-6d920c92a9e5&luid=c0f5c88d-dd89-ba1f-325a-0ee8fbea34dd&rnd=27107 — 200 — 210 B — 179 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-CGFRM1LP6G&gtm=45je64k0v896999969z871205398za20gzb71205398zd71205398&_p=1776895011236&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=399433080.1776895012&frm=0&pscdl=noapi&rcb=4&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938466~115938469~117266401~117512542&sid=1776895011&sct=1&seg=0&dl=https%3A%2F%2Fseattle.gov%2F&dt=Seattle.gov%20Home&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1046region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-CGFRM1LP6G&gtm=45je64k0v896999969z871205398za20gzb71205398zd71205398&_p=1776895011236&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=399433080.1776895012&frm=0&pscdl=noapi&rcb=4&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938466~115938469~117266401~117512542&sid=1776895011&sct=1&seg=0&dl=https%3A%2F%2Fseattle.gov%2F&dt=Seattle.gov%20Home&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1046 — 204 — 48 B — 98 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-PX2J5D97BX&gtm=45je64k0v896999969z871205398za20gzb71205398zd71205398&_p=1776895011236&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=399433080.1776895012&frm=0&pscdl=noapi&rcb=4&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938466~115938469~117266401~117512542&sid=1776895011&sct=1&seg=0&dl=https%3A%2F%2Fseattle.gov%2F&dt=Seattle.gov%20Home&en=page_view&_fv=1&_ss=1&tfd=1054region1.google-analytics.com/g/coll... 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
44% of JavaScript execution is third-party
First-party Third-party 1411ms · 536KB · $19/mo
Unattributable
Other
Costly
Execution 380ms
Transfer 0 KB
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 371ms
Transfer 160 KB
Unused 40%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 336ms
Transfer 160 KB
Unused 40%
Monthly Cost $4/mo
translate.googleapis.com
Other
Optional
Execution 164ms
Transfer 119 KB
Unused 79%
Monthly Cost $2/mo
siteimproveanalytics.com
Other
Optional
Execution 91ms
Transfer 32 KB
Unused 75%
Monthly Cost $1/mo
cdn.jwplayer.com
Other
Optional
Execution 69ms
Transfer 66 KB
Unused 66%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 380ms and costs ~$5/month
  • Google Tag Manager adds 371ms and costs ~$5/month
  • Google Tag Manager adds 336ms and costs ~$4/month

44% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 380ms 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 371ms 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 336ms 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

79% of translate.googleapis.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 siteimproveanalytics.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

66% of cdn.jwplayer.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.

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