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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
3
REVIEW
5
PASS
5
INFO
2

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

Mobile Desktop
84
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

1.36 s

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

2.13 s

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

57 ms

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

0.027

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

1.69 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.

3.58 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
15
5 PASS 5 REVIEW 3 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.7 MiB of 1.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
65 resources · 1.7 MB · 115 KB savings available
FIX
65 resources · 1.7 MB · 115 KB savings available
Warning::
Page weight 722 KB over 1MB target
Got: 1.7 MB Expected: ≤ 1 MB
Info::
~115 KB of savings available
Warning::
64 third-party resources (100% of weight)
Info::
1 resources over 200KB
65 resources · 1.7 MiB · 64 third-party 721.6 KiB over 1MB target
Image 68% · 1.2 MiB
JavaScript 21% · 358.9 KiB
CSS 5% · 88.1 KiB
Font 3% · 56.7 KiB
Document 3% · 49.4 KiB
Other 0% · 1.1 KiB

~115.5 KiB of savings available

Remove unused JavaScript: 115.5 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
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.

C
Page Weight Budget
Action
1.7 MB transferred, 65 requests
REVIEW
1.7 MB transferred, 65 requests
Info::
Page weighs 2.7 MB (1.7 MB transferred)
Warning::
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
Info::
65 HTTP requests
Info::
Estimated 0.36 g CO2 per page load
1.7 MB / 2.4 MB budget
1.7 MB transferred
65 requests
0.36 g CO2 per page load
Images 1.2 MiB 68%
JavaScript 358.9 KiB 21%
CSS 88.1 KiB 5%
Fonts 56.7 KiB 3%
HTML 49.1 KiB 3%
Other 2.5 KiB 0%
Other 547 B 0%
Other 487 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
Image Optimization
Action
33 images, 0 KB saveable
REVIEW
33 images, 0 KB saveable
Warning::
https://www.bls.gov/images/layout/historical_icon.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.dol.gov/themes/opa_theme/img/flag-favi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bls.gov/images/icons/icon_new_release_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bls.gov/images/icons/explainers_news_r... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bls.gov/images/layout/homepage/chicago... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bls.gov/images/icons/explainers_histor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.dol.gov/themes/opa_theme/img/logo-prim... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bls.gov/ooh/content/ooh-h-banner.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bls.gov/images/bls_emblem_trans.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
33 images 1.2 MB
0 oversized -0 KB
31 legacy format
9 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

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

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

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

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

B
JS Execution Cost
734ms total JS execution
REVIEW
734ms total JS execution
Info::
https://www.bls.gov/: 181ms CPU time
Info::
https://data.bls.gov/javascripts/jquery-latest.js: 168ms CPU time
Info::
Unattributable: 137ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-CSLL...: 101ms CPU time
Info::
https://www.bls.gov/javascripts/jquery-latest.js: 94ms CPU time
Warning::
Third-party scripts: 734ms (100% of total)

Main Thread Breakdown

Script Evaluation 42% Other 21% Style & Layout 21% Parse HTML & CSS 8% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.bls.gov/181ms3ms1ms3rd
https://data.bls.gov/javascripts/jquery-latest.js168ms128ms3ms3rd
Unattributable137ms2ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L101ms81ms14ms3rd
https://www.bls.gov/javascripts/jquery-latest.js94ms61ms3ms3rd
https://data.bls.gov/cgi-bin/cpicalc.pl53ms15ms0ms3rd
B
JS Bundles
14 scripts, 115 KB unused
REVIEW
14 scripts, 115 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CSLL...: 60 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.bls.gov/javascripts/bls-latest.js: 29 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.bls.gov/javascripts/bls-latest.js: unminified — 7 KB could be saved
Warning::
https://data.bls.gov/javascripts/jquery-latest.js: 26 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 115 KB
115 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L147 KB60 KB (41%)✓3rd
https://www.bls.gov/javascripts/bls-latest.js43 KB29 KB (68%)✗3rd
https://data.bls.gov/javascripts/jquery-latest.js42 KB26 KB (63%)✓3rd
https://www.bls.gov/assets/bootstrap/latest/bootstrap.min.js17 KB—✓3rd
https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOL&subagency=BLS&yt=true9 KB—✓3rd
https://www.bls.gov/javascripts/jquery-tools.js9 KB—✓3rd
https://www.bls.gov/javascripts/jquery-migrate-1.2.1.min.js4 KB—✓3rd
https://www.bls.gov/javascripts/touchpointsForms.js10 KB—✗3rd
https://dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js4 KB—✓3rd
https://www.bls.gov/assets/bootstrap/latest/popper.min.js7 KB—✓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

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
3 fonts (57 KB)
PASS
3 fonts (57 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

57 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.4 s LCP 2.1 shttps://www.bls.gov/include/fonts/source-sans-pro/sourcesanspro-regular-webfont.woff2sourcesanspro-regular-w... https://www.bls.gov/include/fonts/source-sans-pro/sourcesanspro-regular-webfont.woff2 — 20.3 KiB — 53 ms — font-display: swaphttps://www.bls.gov/include/fonts/source-sans-pro/sourcesanspro-bold-webfont.woff2sourcesanspro-bold-webf... https://www.bls.gov/include/fonts/source-sans-pro/sourcesanspro-bold-webfont.woff2 — 20.1 KiB — 42 ms — font-display: swaphttps://www.bls.gov/include/fonts/source-sans-pro/sourcesanspro-italic-webfont.woff2sourcesanspro-italic-we... https://www.bls.gov/include/fonts/source-sans-pro/sourcesanspro-italic-webfont.woff2 — 16.2 KiB — 51 ms — font-display: swap
sourcesanspro-regular-w... woff2 swap
Size 20 KB
Load time 53 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
sourcesanspro-bold-webf... woff2 swap
Size 20 KB
Load time 42 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
sourcesanspro-italic-we... woff2 swap
Size 16 KB
Load time 51 ms
Start 1.3 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
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
Network Waterfall
65 requests over 3276ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.4 s LCP 2.1 shttps://bls.gov// https://bls.gov/ — 302 — 108 B — 656 ms — http/1.0https://www.bls.gov/www.bls.gov/ https://www.bls.gov/ — 200 — 25.9 KiB — 352 ms — h2https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOL&subagency=BLS&yt=truedap.digitalgov.gov/Universal-Federa... https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOL&subagency=BLS&yt=true — 200 — 9.4 KiB — 28 ms — h3https://www.bls.gov/javascripts/jquery-latest.jswww.bls.gov/javascripts/jquery-late... https://www.bls.gov/javascripts/jquery-latest.js — 200 — 42.1 KiB — 63 ms — h2https://www.bls.gov/assets/bootstrap/latest/bootstrap.min.csswww.bls.gov/assets/bootstrap/latest... https://www.bls.gov/assets/bootstrap/latest/bootstrap.min.css — 200 — 31.1 KiB — 36 ms — h2https://www.bls.gov/assets/bootstrap/latest/popper.min.jswww.bls.gov/assets/bootstrap/latest... https://www.bls.gov/assets/bootstrap/latest/popper.min.js — 200 — 7.5 KiB — 53 ms — h2https://www.bls.gov/assets/bootstrap/latest/bootstrap.min.jswww.bls.gov/assets/bootstrap/latest... https://www.bls.gov/assets/bootstrap/latest/bootstrap.min.js — 200 — 17.3 KiB — 55 ms — h2https://www.bls.gov/stylesheets/bls_combined.csswww.bls.gov/stylesheets/bls_combine... https://www.bls.gov/stylesheets/bls_combined.css — 200 — 21.1 KiB — 36 ms — h2https://www.bls.gov/stylesheets/bls_content.csswww.bls.gov/stylesheets/bls_content... https://www.bls.gov/stylesheets/bls_content.css — 200 — 15.7 KiB — 38 ms — h2https://www.bls.gov/stylesheets/bls_tables.csswww.bls.gov/stylesheets/bls_tables.... https://www.bls.gov/stylesheets/bls_tables.css — 200 — 5.4 KiB — 41 ms — h2https://www.bls.gov/stylesheets/jquery-tools.csswww.bls.gov/stylesheets/jquery-tool... https://www.bls.gov/stylesheets/jquery-tools.css — 200 — 2.2 KiB — 43 ms — h2https://www.bls.gov/javascripts/bls-latest.jswww.bls.gov/javascripts/bls-latest.... https://www.bls.gov/javascripts/bls-latest.js — 200 — 42.9 KiB — 63 ms — h2https://www.bls.gov/javascripts/jquery-tools.jswww.bls.gov/javascripts/jquery-tool... https://www.bls.gov/javascripts/jquery-tools.js — 200 — 9.1 KiB — 61 ms — h2https://www.bls.gov/javascripts/jquery-migrate-1.2.1.min.jswww.bls.gov/javascripts/jquery-migr... https://www.bls.gov/javascripts/jquery-migrate-1.2.1.min.js — 200 — 4.4 KiB — 62 ms — h2https://www.bls.gov/stylesheets/bls_home.csswww.bls.gov/stylesheets/bls_home.cs... https://www.bls.gov/stylesheets/bls_home.css — 200 — 6.8 KiB — 44 ms — h2https://www.dol.gov/themes/opa_theme/img/flag-favicon-57.pngwww.dol.gov/themes/opa_theme/img/fl... https://www.dol.gov/themes/opa_theme/img/flag-favicon-57.png — 200 — 976 B — 73 ms — h2https://www.dol.gov/themes/opa_theme/img/logo-primary.svgwww.dol.gov/themes/opa_theme/img/lo... https://www.dol.gov/themes/opa_theme/img/logo-primary.svg — 200 — 28.1 KiB — 75 ms — h2https://www.dol.gov/themes/opa_theme/img/icon-dot-gov.svgwww.dol.gov/themes/opa_theme/img/ic... https://www.dol.gov/themes/opa_theme/img/icon-dot-gov.svg — 200 — 1.1 KiB — 14 ms — h2https://www.dol.gov/themes/opa_theme/img/icon-https.svgwww.dol.gov/themes/opa_theme/img/ic... https://www.dol.gov/themes/opa_theme/img/icon-https.svg — 200 — 972 B — 11 ms — h2https://www.bls.gov/images/buttons/search_button_blue_16.pngwww.bls.gov/images/buttons/search_b... https://www.bls.gov/images/buttons/search_button_blue_16.png — 200 — 2.2 KiB — 87 ms — h2https://www.bls.gov/javascripts/touchpointsForms.jswww.bls.gov/javascripts/touchpoints... https://www.bls.gov/javascripts/touchpointsForms.js — 200 — 10.3 KiB — 23 ms — h2https://www.bls.gov/stylesheets/touchpointsForms.csswww.bls.gov/stylesheets/touchpoints... https://www.bls.gov/stylesheets/touchpointsForms.css — 200 — 4.4 KiB — 25 ms — h2https://www.bls.gov/images/buttons/search_button_blue_20.pngwww.bls.gov/images/buttons/search_b... https://www.bls.gov/images/buttons/search_button_blue_20.png — 200 — 2.3 KiB — 27 ms — h2https://www.bls.gov/images/layout/homepage/boston.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/boston.jpg — 200 — 37.6 KiB — 31 ms — h2https://www.bls.gov/images/layout/homepage/philadelphia.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/philadelphia.jpg — 200 — 35.9 KiB — 35 ms — h2https://www.bls.gov/images/layout/homepage/atlanta.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/atlanta.jpg — 200 — 34.6 KiB — 39 ms — h2https://www.bls.gov/images/layout/homepage/chicago.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/chicago.jpg — 200 — 36.9 KiB — 41 ms — h2https://www.bls.gov/images/layout/homepage/dallas.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/dallas.jpg — 200 — 18.7 KiB — 42 ms — h2https://www.bls.gov/images/layout/homepage/kansascity.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/kansascity.jpg — 200 — 23.8 KiB — 44 ms — h2https://www.bls.gov/images/layout/homepage/sanfrancisco.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/sanfrancisco.jpg — 200 — 23.7 KiB — 46 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 1.4 s LCP 2.1 shttps://bls.gov// https://bls.gov/ — 302 — 108 B — 656 ms — http/1.0https://www.bls.gov/www.bls.gov/ https://www.bls.gov/ — 200 — 25.9 KiB — 352 ms — h2https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOL&subagency=BLS&yt=truedap.digitalgov.gov/Universal-Federa... https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOL&subagency=BLS&yt=true — 200 — 9.4 KiB — 28 ms — h3https://www.bls.gov/javascripts/jquery-latest.jswww.bls.gov/javascripts/jquery-late... https://www.bls.gov/javascripts/jquery-latest.js — 200 — 42.1 KiB — 63 ms — h2https://www.bls.gov/assets/bootstrap/latest/bootstrap.min.csswww.bls.gov/assets/bootstrap/latest... https://www.bls.gov/assets/bootstrap/latest/bootstrap.min.css — 200 — 31.1 KiB — 36 ms — h2https://www.bls.gov/assets/bootstrap/latest/popper.min.jswww.bls.gov/assets/bootstrap/latest... https://www.bls.gov/assets/bootstrap/latest/popper.min.js — 200 — 7.5 KiB — 53 ms — h2https://www.bls.gov/assets/bootstrap/latest/bootstrap.min.jswww.bls.gov/assets/bootstrap/latest... https://www.bls.gov/assets/bootstrap/latest/bootstrap.min.js — 200 — 17.3 KiB — 55 ms — h2https://www.bls.gov/stylesheets/bls_combined.csswww.bls.gov/stylesheets/bls_combine... https://www.bls.gov/stylesheets/bls_combined.css — 200 — 21.1 KiB — 36 ms — h2https://www.bls.gov/stylesheets/bls_content.csswww.bls.gov/stylesheets/bls_content... https://www.bls.gov/stylesheets/bls_content.css — 200 — 15.7 KiB — 38 ms — h2https://www.bls.gov/stylesheets/bls_tables.csswww.bls.gov/stylesheets/bls_tables.... https://www.bls.gov/stylesheets/bls_tables.css — 200 — 5.4 KiB — 41 ms — h2https://www.bls.gov/stylesheets/jquery-tools.csswww.bls.gov/stylesheets/jquery-tool... https://www.bls.gov/stylesheets/jquery-tools.css — 200 — 2.2 KiB — 43 ms — h2https://www.bls.gov/javascripts/bls-latest.jswww.bls.gov/javascripts/bls-latest.... https://www.bls.gov/javascripts/bls-latest.js — 200 — 42.9 KiB — 63 ms — h2https://www.bls.gov/javascripts/jquery-tools.jswww.bls.gov/javascripts/jquery-tool... https://www.bls.gov/javascripts/jquery-tools.js — 200 — 9.1 KiB — 61 ms — h2https://www.bls.gov/javascripts/jquery-migrate-1.2.1.min.jswww.bls.gov/javascripts/jquery-migr... https://www.bls.gov/javascripts/jquery-migrate-1.2.1.min.js — 200 — 4.4 KiB — 62 ms — h2https://www.bls.gov/stylesheets/bls_home.csswww.bls.gov/stylesheets/bls_home.cs... https://www.bls.gov/stylesheets/bls_home.css — 200 — 6.8 KiB — 44 ms — h2https://www.dol.gov/themes/opa_theme/img/flag-favicon-57.pngwww.dol.gov/themes/opa_theme/img/fl... https://www.dol.gov/themes/opa_theme/img/flag-favicon-57.png — 200 — 976 B — 73 ms — h2https://www.dol.gov/themes/opa_theme/img/logo-primary.svgwww.dol.gov/themes/opa_theme/img/lo... https://www.dol.gov/themes/opa_theme/img/logo-primary.svg — 200 — 28.1 KiB — 75 ms — h2https://www.dol.gov/themes/opa_theme/img/icon-dot-gov.svgwww.dol.gov/themes/opa_theme/img/ic... https://www.dol.gov/themes/opa_theme/img/icon-dot-gov.svg — 200 — 1.1 KiB — 14 ms — h2https://www.dol.gov/themes/opa_theme/img/icon-https.svgwww.dol.gov/themes/opa_theme/img/ic... https://www.dol.gov/themes/opa_theme/img/icon-https.svg — 200 — 972 B — 11 ms — h2https://www.bls.gov/images/buttons/search_button_blue_16.pngwww.bls.gov/images/buttons/search_b... https://www.bls.gov/images/buttons/search_button_blue_16.png — 200 — 2.2 KiB — 87 ms — h2https://www.bls.gov/javascripts/touchpointsForms.jswww.bls.gov/javascripts/touchpoints... https://www.bls.gov/javascripts/touchpointsForms.js — 200 — 10.3 KiB — 23 ms — h2https://www.bls.gov/stylesheets/touchpointsForms.csswww.bls.gov/stylesheets/touchpoints... https://www.bls.gov/stylesheets/touchpointsForms.css — 200 — 4.4 KiB — 25 ms — h2https://www.bls.gov/images/buttons/search_button_blue_20.pngwww.bls.gov/images/buttons/search_b... https://www.bls.gov/images/buttons/search_button_blue_20.png — 200 — 2.3 KiB — 27 ms — h2https://www.bls.gov/images/layout/homepage/boston.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/boston.jpg — 200 — 37.6 KiB — 31 ms — h2https://www.bls.gov/images/layout/homepage/philadelphia.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/philadelphia.jpg — 200 — 35.9 KiB — 35 ms — h2https://www.bls.gov/images/layout/homepage/atlanta.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/atlanta.jpg — 200 — 34.6 KiB — 39 ms — h2https://www.bls.gov/images/layout/homepage/chicago.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/chicago.jpg — 200 — 36.9 KiB — 41 ms — h2https://www.bls.gov/images/layout/homepage/dallas.jpgwww.bls.gov/images/layout/homepage/... https://www.bls.gov/images/layout/homepage/dallas.jpg — 200 — 18.7 KiB — 42 ms — h2https://www.bls.gov/images/layout/homepage/kansascity.jpgwww.bls.gov/images/layout/homepage/... 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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
100% of JavaScript execution is third-party
First-party Third-party 734ms · 281KB · $10/mo
www.bls.gov
Other
Optional
Execution 181ms
Transfer 26 KB
Monthly Cost $2/mo
data.bls.gov
Other
Optional
Execution 168ms
Transfer 42 KB
Unused 63%
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 137ms
Transfer 0 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 101ms
Transfer 147 KB
Unused 41%
Monthly Cost $1/mo
www.bls.gov
Other
Optional
Execution 94ms
Transfer 42 KB
Monthly Cost $1/mo
data.bls.gov
Other
Optional
Execution 53ms
Transfer 23 KB
Monthly Cost $1/mo

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

63% of data.bls.gov'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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