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https://ustr.gov

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
2
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
60
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.
77
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.

646 ms

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

1.89 s

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

296 ms

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

0.427

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

1.10 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.

2.14 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
7 PASS 4 REVIEW 2 FIX
F
Page Weight Budget
Action
3.0 MB transferred, 37 requests
FIX
3.0 MB transferred, 37 requests
Warning::
Page weighs 4.8 MB (3.0 MB transferred)
Warning::
Images are 1.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.8 MB
Warning::
JavaScript is 676 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 676 KB
Info::
Fonts are 237 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 237 KB
Info::
37 HTTP requests
Info::
Estimated 0.62 g CO2 per page load
3.0 MB / 2.4 MB budget
3.0 MB transferred
37 requests
0.62 g CO2 per page load
Images 1.8 MiB 62%
JavaScript 676.2 KiB 22%
Fonts 236.6 KiB 8%
Other 184.4 KiB 6%
CSS 66.3 KiB 2%
HTML 8.7 KiB 0%
Other 422 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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

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

D
JS Bundles
Action
12 scripts, 324 KB unused
FIX
12 scripts, 324 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-HT08...: 67 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ustr.gov/sites/default/files/js/js_ZaRNhUU...: 66 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-423...: 64 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-T3Z...: 64 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2918...: 63 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 324 KB
324 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-HT08QPSXYV&cx=c&gtm=4e64h1156 KB67 KB (43%)✓3rd
https://ustr.gov/sites/default/files/js/js_ZaRNhUUxEArVbtF5qQOkVGJJdQTFkPkiH8Kl255Lw2Y.js?scope=header&delta=0&language=en&theme=ustr2025&include=eJwrLS4pMjIwMtVPz8lPSszRLS6pzMnMSwcAYU8Ibw90 KB66 KB (74%)✓1st
https://www.googletagmanager.com/gtag/js?id=UA-4234744-1125 KB64 KB (52%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-T3Z767B119 KB64 KB (54%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-29181NRMEY&cx=c&gtm=4e64h1145 KB63 KB (43%)✓3rd
https://ustr.gov/themes/custom/ustr2025/js/ustr-homepage.js2 KB—✓1st
https://ustr.gov/themes/custom/ustr2025/js/vendor/sticky-helper.js1 KB—✓1st
https://ustr.gov/themes/custom/ustr2025/js/vendor/jquery-cookie-master/src/jquery.cookie.js2 KB—✓1st
https://ustr.gov/themes/custom/ustr2025/js/vendor/jquery.sticky.js3 KB—✓1st
https://ustr.gov/themes/custom/ustr2025/js/ustr.js5 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

C
Image Optimization
Action
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Warning::
https://ustr.gov/themes/custom/ustr2025/images/twi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/ins... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/sites/default/files/2025-09/ustr%... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/you... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/ust... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/jam... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/ins... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/x-l... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/fac... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/ema... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/sea... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ustr.gov/themes/custom/ustr2025/images/fac... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
17 images 1.8 MB
0 oversized -0 KB
17 legacy format
12 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

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

C
JS Execution Cost
Action
1316ms total JS execution
REVIEW
1316ms total JS execution
Warning::
https://ustr.gov/: 892ms CPU time
Info::
Unattributable: 142ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-HT08...: 75ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-2918...: 72ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-T3Z...: 71ms CPU time
Info::
Third-party scripts: 359ms (27% of total)

Main Thread Breakdown

Other 56% Script Evaluation 21% Style & Layout 15% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://ustr.gov/892ms2ms1ms1st
Unattributable142ms24ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-HT08QPSXYV&cx=c&gtm=4e64h175ms62ms12ms3rd
https://www.googletagmanager.com/gtag/js?id=G-29181NRMEY&cx=c&gtm=4e64h172ms59ms11ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-T3Z767B71ms62ms9ms3rd
https://ustr.gov/sites/default/files/js/js_ZaRNhUUxEArVbtF5qQOkVGJJdQTFkPkiH8Kl255Lw2Y.js?scope=header&delta=0&language=en&theme=ustr2025&include=eJwrLS4pMjIwMtVPz8lPSszRLS6pzMnMSwcAYU8Ibw65ms46ms9ms1st
C
Page Weight Inventory
Action
37 resources · 3.0 MB · 324 KB savings available
REVIEW
37 resources · 3.0 MB · 324 KB savings available
Warning::
Page weight 2.0 MB over 1MB target
Got: 3.0 MB Expected: ≤ 1 MB
Info::
~324 KB of savings available
Info::
8 third-party resources (19% of weight)
Info::
3 resources over 200KB
37 resources · 3.0 MiB · 8 third-party 2.0 MiB over 1MB target
Image 68% · 2.0 MiB
JavaScript 22% · 676.2 KiB
Font 8% · 236.6 KiB
CSS 2% · 66.3 KiB
Document 0% · 8.7 KiB
Other 0% · 422 B

~323.6 KiB of savings available

Remove unused JavaScript: 323.6 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
19% third-party, 0 ms blocking
PASS
19% third-party, 0 ms blocking
Info::
Third-party code accounts for 19% of page weight (566.0 KiB of 3.0 MiB)
Info::
Third-party blocking time is low (0 ms)
81%
19%
First-party Third-party
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 (237 KB)
PASS
2 fonts (237 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

237 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 500 ms 1.0 s 1.5 s FCP 646 ms LCP 1.9 shttps://ustr.gov/themes/custom/ustr2025/css/vendor/icomoon/fonts/icomoon/fonts/icomoon.ttf?10si43=icomoon.ttf https://ustr.gov/themes/custom/ustr2025/css/vendor/icomoon/fonts/icomoon/fonts/icomoon.ttf?10si43= — 147.6 KiB — 67 ms — font-display: swaphttps://ustr.gov/themes/custom/ustr2025/css/vendor/bootstrap-icons/fonts/bootstrap-icons.woff2?856008caa5eb66df68595e734e59580d=bootstrap-icons.woff2 https://ustr.gov/themes/custom/ustr2025/css/vendor/bootstrap-icons/fonts/bootstrap-icons.woff2?856008caa5eb66df68595e734e59580d= — 89.0 KiB — 68 ms — font-display: swap
icomoon.ttf ttf swap
Size 148 KB
Load time 67 ms
Start 206 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
bootstrap-icons.woff2 woff2 swap
Size 89 KB
Load time 68 ms
Start 206 ms
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)

Fixing the unchecked items could save ~118 KB and ~236 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+
HTTP Caching
max-age=600 (10 minutes)
PASS
max-age=600 (10 minutes)
Info::
Cache-Control header is set
Got: max-age=600, public
Info::
Effective TTL: 10 minutes (max-age=600)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

max-age=600, public

DirectiveValueMeaning
max-age600Cache for 10 minutes
public—Any cache may store this response
Effective TTL: 600 seconds
Network Waterfall
37 requests over 1490ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 646 ms LCP 1.9 shttps://ustr.gov// https://ustr.gov/ — 200 — 8.7 KiB — 28 ms — h2https://ustr.gov/sites/default/files/css/css_rrepPzRM8RfkGVAsISLtF3x00z1k7zhq_srQ2HPmBi8.css?delta=0&language=en&theme=ustr2025&include=eJwlylEKgCAQRdENWRNCCxptEGF0wKeFrT7In8v5uFEZmBQY4uJyEYCTwEVrQtVaYc2vOEx0KWsd6M0f_qSkFlg39Km5JndneUB_92LXUPkAHCElEQ/sites/default/files/css/css_rrepPz... https://ustr.gov/sites/default/files/css/css_rrepPzRM8RfkGVAsISLtF3x00z1k7zhq_srQ2HPmBi8.css?delta=0&language=en&theme=ustr2025&include=eJwlylEKgCAQRdENWRNCCxptEGF0wKeFrT7In8v5uFEZmBQY4uJyEYCTwEVrQtVaYc2vOEx0KWsd6M0f_qSkFlg39Km5JndneUB_92LXUPkAHCElEQ — 200 — 5.6 KiB — 19 ms — h2https://ustr.gov/sites/default/files/css/css_tyA7LDF1r66HGvt4VoirSeYqKVJDNJo8ihv3QUrt1Uk.css?delta=1&language=en&theme=ustr2025&include=eJwlylEKgCAQRdENWRNCCxptEGF0wKeFrT7In8v5uFEZmBQY4uJyEYCTwEVrQtVaYc2vOEx0KWsd6M0f_qSkFlg39Km5JndneUB_92LXUPkAHCElEQ/sites/default/files/css/css_tyA7LD... https://ustr.gov/sites/default/files/css/css_tyA7LDF1r66HGvt4VoirSeYqKVJDNJo8ihv3QUrt1Uk.css?delta=1&language=en&theme=ustr2025&include=eJwlylEKgCAQRdENWRNCCxptEGF0wKeFrT7In8v5uFEZmBQY4uJyEYCTwEVrQtVaYc2vOEx0KWsd6M0f_qSkFlg39Km5JndneUB_92LXUPkAHCElEQ — 200 — 60.8 KiB — 29 ms — h2https://ustr.gov/sites/default/files/js/js_ZaRNhUUxEArVbtF5qQOkVGJJdQTFkPkiH8Kl255Lw2Y.js?scope=header&delta=0&language=en&theme=ustr2025&include=eJwrLS4pMjIwMtVPz8lPSszRLS6pzMnMSwcAYU8Ibw/sites/default/files/js/js_ZaRNhUUx... https://ustr.gov/sites/default/files/js/js_ZaRNhUUxEArVbtF5qQOkVGJJdQTFkPkiH8Kl255Lw2Y.js?scope=header&delta=0&language=en&theme=ustr2025&include=eJwrLS4pMjIwMtVPz8lPSszRLS6pzMnMSwcAYU8Ibw — 200 — 90.2 KiB — 40 ms — h2https://ustr.gov/themes/custom/ustr2025/images/ustr_text.png/themes/custom/ustr2025/images/ustr... https://ustr.gov/themes/custom/ustr2025/images/ustr_text.png — 200 — 13.0 KiB — 30 ms — h2https://ustr.gov/themes/custom/ustr2025/images/twitter-dark.png/themes/custom/ustr2025/images/twit... https://ustr.gov/themes/custom/ustr2025/images/twitter-dark.png — 200 — 4.6 KiB — 33 ms — h2https://ustr.gov/themes/custom/ustr2025/images/facebook_logo_dark.png/themes/custom/ustr2025/images/face... https://ustr.gov/themes/custom/ustr2025/images/facebook_logo_dark.png — 200 — 6.2 KiB — 8 ms — h2https://ustr.gov/themes/custom/ustr2025/images/instagram-logo.png/themes/custom/ustr2025/images/inst... https://ustr.gov/themes/custom/ustr2025/images/instagram-logo.png — 200 — 16.0 KiB — 10 ms — h2https://ustr.gov/themes/custom/ustr2025/images/email-icon.png/themes/custom/ustr2025/images/emai... https://ustr.gov/themes/custom/ustr2025/images/email-icon.png — 200 — 21.1 KiB — 12 ms — h2https://ustr.gov/themes/custom/ustr2025/js/ustr-homepage.js/themes/custom/ustr2025/js/ustr-hom... https://ustr.gov/themes/custom/ustr2025/js/ustr-homepage.js — 200 — 2.2 KiB — 13 ms — h2https://ustr.gov/themes/custom/ustr2025/images/ustrlogo.png/themes/custom/ustr2025/images/ustr... https://ustr.gov/themes/custom/ustr2025/images/ustrlogo.png — 200 — 138.3 KiB — 35 ms — h2https://ustr.gov/themes/custom/ustr2025/images/search-icon.png/themes/custom/ustr2025/images/sear... https://ustr.gov/themes/custom/ustr2025/images/search-icon.png — 200 — 6.3 KiB — 38 ms — h2https://ustr.gov/themes/custom/ustr2025/images/search-icon-dark.png/themes/custom/ustr2025/images/sear... https://ustr.gov/themes/custom/ustr2025/images/search-icon-dark.png — 200 — 5.1 KiB — 41 ms — h2https://ustr.gov/sites/default/files/2025-09/ustr%20header-Recovered4.jpg/sites/default/files/2025-09/ustr%2... https://ustr.gov/sites/default/files/2025-09/ustr%20header-Recovered4.jpg — 200 — 569.0 KiB — 104 ms — h2https://ustr.gov/themes/custom/ustr2025/images/jamieson_greer_signature.png/themes/custom/ustr2025/images/jami... https://ustr.gov/themes/custom/ustr2025/images/jamieson_greer_signature.png — 200 — 29.5 KiB — 52 ms — h2https://ustr.gov/themes/custom/ustr2025/images/jamieson_greer_headshot.jpg/themes/custom/ustr2025/images/jami... https://ustr.gov/themes/custom/ustr2025/images/jamieson_greer_headshot.jpg — 200 — 221.7 KiB — 125 ms — h2https://ustr.gov/themes/custom/ustr2025/images/x-logo-white.png/themes/custom/ustr2025/images/x-lo... https://ustr.gov/themes/custom/ustr2025/images/x-logo-white.png — 200 — 101.2 KiB — 54 ms — h2https://ustr.gov/themes/custom/ustr2025/images/facebook_logo_white.png/themes/custom/ustr2025/images/face... https://ustr.gov/themes/custom/ustr2025/images/facebook_logo_white.png — 200 — 46.8 KiB — 56 ms — h2https://ustr.gov/themes/custom/ustr2025/images/instagram_white.png/themes/custom/ustr2025/images/inst... https://ustr.gov/themes/custom/ustr2025/images/instagram_white.png — 200 — 186.4 KiB — 63 ms — h2https://ustr.gov/themes/custom/ustr2025/images/youtube-white.svg/themes/custom/ustr2025/images/yout... https://ustr.gov/themes/custom/ustr2025/images/youtube-white.svg — 200 — 1.1 KiB — 124 ms — h2https://ustr.gov/themes/custom/ustr2025/js/vendor/sticky-helper.js/themes/custom/ustr2025/js/vendor/s... https://ustr.gov/themes/custom/ustr2025/js/vendor/sticky-helper.js — 200 — 1.3 KiB — 122 ms — h2https://ustr.gov/themes/custom/ustr2025/js/vendor/jquery-cookie-master/src/jquery.cookie.js/themes/custom/ustr2025/js/vendor/j... https://ustr.gov/themes/custom/ustr2025/js/vendor/jquery-cookie-master/src/jquery.cookie.js — 200 — 1.9 KiB — 117 ms — h2https://ustr.gov/themes/custom/ustr2025/js/vendor/jquery.sticky.js/themes/custom/ustr2025/js/vendor/j... https://ustr.gov/themes/custom/ustr2025/js/vendor/jquery.sticky.js — 200 — 3.1 KiB — 116 ms — h2https://ustr.gov/themes/custom/ustr2025/js/ustr.js/themes/custom/ustr2025/js/ustr.js https://ustr.gov/themes/custom/ustr2025/js/ustr.js — 200 — 5.1 KiB — 116 ms — h2https://ustr.gov/themes/custom/ustr2025/slick/slick/slick.min.js?v=8.8.0/themes/custom/ustr2025/slick/slick... https://ustr.gov/themes/custom/ustr2025/slick/slick/slick.min.js?v=8.8.0 — 200 — 6.9 KiB — 116 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-T3Z767Bwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-T3Z767B — 200 — 118.9 KiB — 113 ms — h2https://ustr.gov/themes/custom/ustr2025/images/weld_bed_1.jpg/themes/custom/ustr2025/images/weld... https://ustr.gov/themes/custom/ustr2025/images/weld_bed_1.jpg — 200 — 508.8 KiB — 126 ms — h2https://ustr.gov/themes/custom/ustr2025/css/vendor/icomoon/fonts/icomoon/fonts/icomoon.ttf?10si43=/themes/custom/ustr2025/css/vendor/... https://ustr.gov/themes/custom/ustr2025/css/vendor/icomoon/fonts/icomoon/fonts/icomoon.ttf?10si43= — 200 — 147.6 KiB — 67 ms — h2https://ustr.gov/themes/custom/ustr2025/css/vendor/bootstrap-icons/fonts/bootstrap-icons.woff2?856008caa5eb66df68595e734e59580d=/themes/custom/ustr2025/css/vendor/... https://ustr.gov/themes/custom/ustr2025/css/vendor/bootstrap-icons/fonts/bootstrap-icons.woff2?856008caa5eb66df68595e734e59580d= — 200 — 89.0 KiB — 68 ms — h2https://www.googletagmanager.com/gtag/js?id=G-HT08QPSXYV&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-HT08QPSXYV&cx=c&gtm=4e64h1 — 200 — 155.6 KiB — 69 ms — h2
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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
27% of JavaScript execution is third-party
First-party Third-party 359ms · 420KB · €4/mo
Unattributable
Other
Optional
Execution 142ms
Transfer 0 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 75ms
Transfer 156 KB
Unused 43%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 72ms
Transfer 145 KB
Unused 43%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 71ms
Transfer 119 KB
Unused 54%
Monthly Cost €1/mo

54% of Google Tag Manager'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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