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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
4
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
59
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.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

3.83 s

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

9.76 s

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

251 ms

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

0.020

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

4.94 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.

9.77 s

Page Load Progression

470 ms
940 ms
1.4 s
1.9 s
2.4 s
2.8 s
3.3 s
3.8 s
Checks
17
7 PASS 4 REVIEW 4 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 (1.6 MiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2510ms total JS execution
FIX
2510ms total JS execution
Warning::
https://www.pew.org/en/: 1336ms CPU time
Warning::
Unattributable: 372ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-W2Z...: 280ms CPU time
Info::
https://cdn.cookielaw.org/scripttemplates/202603.1...: 209ms CPU time
Info::
https://js-agent.newrelic.com/nr-spa-1.313.1.min.j...: 131ms CPU time
Warning::
Third-party scripts: 2510ms (100% of total)

Main Thread Breakdown

Script Evaluation 30% Other 27% Style & Layout 25% Rendering 10% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.pew.org/en/1336ms141ms20ms3rd
Unattributable372ms90ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W2Z5TT280ms232ms42ms3rd
https://cdn.cookielaw.org/scripttemplates/202603.1.0/otBannerSdk.js209ms140ms41ms3rd
https://js-agent.newrelic.com/nr-spa-1.313.1.min.js131ms109ms7ms3rd
https://www.pew.org/assets/pew/js/index-generated.js?v=639083249695468357118ms12ms0ms3rd
https://www.pew.org/assets/pew/js/chunks/a11y-d6f76ddc.js63ms29ms0ms3rd
D
Page Weight Inventory
Action
57 resources · 1.6 MB · 137 KB savings available
FIX
57 resources · 1.6 MB · 137 KB savings available
Warning::
Page weight 571 KB over 1MB target
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~137 KB of savings available
Warning::
56 third-party resources (100% of weight)
57 resources · 1.6 MiB · 56 third-party 570.6 KiB over 1MB target
Image 49% · 781.8 KiB
JavaScript 27% · 433.8 KiB
Font 15% · 238.5 KiB
Document 3% · 54.6 KiB
CSS 3% · 47.8 KiB
Other 2% · 38.1 KiB

~136.5 KiB of savings available

Remove unused JavaScript: 136.5 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
1.6 MB transferred, 57 requests
REVIEW
1.6 MB transferred, 57 requests
Info::
Page weighs 3.2 MB (1.6 MB transferred)
Info::
Fonts are 238 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 238 KB
Info::
57 HTTP requests
Info::
Estimated 0.33 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
57 requests
0.33 g CO2 per page load
Images 769.4 KiB 48%
JavaScript 433.8 KiB 27%
Fonts 238.5 KiB 15%
HTML 53.9 KiB 3%
CSS 43.1 KiB 3%
Other 39.8 KiB 2%
Other 11.4 KiB 1%
Other 4.7 KiB 0%
0 2.4 MB 4.9 MB
Approaching limit

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

B
Image Optimization
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Info::
All images are well-optimized
10 images 769 KB
0 oversized -0 KB
9 legacy format
0 missing dimensions CLS risk
B
JS Bundles
23 scripts, 137 KB unused
REVIEW
23 scripts, 137 KB unused
Warning::
https://cdn.cookielaw.org/scripttemplates/202603.1...: 69 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-W2Z...: 68 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 137 KB
137 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.cookielaw.org/scripttemplates/202603.1.0/otBannerSdk.js130 KB69 KB (53%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W2Z5TT174 KB68 KB (39%)✓3rd
https://www.pew.org/assets/Pew/js/chunks/RichTextField.init-096c9b19.js1 KB—✓3rd
https://www.pew.org/assets/Pew/js/chunks/FactSlider.init-502ee93d.js0 KB—✓3rd
https://www.pew.org/layouts/system/VisitorIdentification.js1 KB—✓3rd
https://www.pew.org/assets/pew/js/chunks/vendor-d4adba7a.js9 KB—✓3rd
https://www.pew.org/assets/pew/js/chunks/clickableCard.init-6981df03.js1 KB—✓3rd
https://www.pew.org/assets/Pew/js/chunks/NewsletterSignup.init-2e575136.js1 KB—✓3rd
https://www.pew.org/assets/Pew/js/chunks/vendor-d4adba7a.js9 KB—✓3rd
https://www.pew.org/assets/pew/js/chunks/tabs.init-91614be0.js1 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

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
5 fonts (238 KB)
PASS
5 fonts (238 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

238 KB total

Render-blocking

0

of 5

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 3.8 s LCP 9.8 shttps://www.pew.org/assets/Pew/assets/fonts/Lato-Black.woff2Lato-Black.woff2 https://www.pew.org/assets/Pew/assets/fonts/Lato-Black.woff2 — 26.9 KiB — 49 ms — font-display: swaphttps://www.pew.org/assets/Pew/assets/fonts/Lato-Regular.woff2Lato-Regular.woff2 https://www.pew.org/assets/Pew/assets/fonts/Lato-Regular.woff2 — 27.9 KiB — 33 ms — font-display: swaphttps://www.pew.org/assets/Pew/assets/fonts/Lato-Bold.woff2Lato-Bold.woff2 https://www.pew.org/assets/Pew/assets/fonts/Lato-Bold.woff2 — 27.3 KiB — 49 ms — font-display: swaphttps://www.pew.org/assets/Pew/assets/fonts/RobotoSerif20pt-Regular.woff2RobotoSerif20pt-Regular... https://www.pew.org/assets/Pew/assets/fonts/RobotoSerif20pt-Regular.woff2 — 73.0 KiB — 40 ms — font-display: swaphttps://www.pew.org/assets/Pew/assets/fonts/RobotoSerif20pt-Medium.woff2RobotoSerif20pt-Medium.... https://www.pew.org/assets/Pew/assets/fonts/RobotoSerif20pt-Medium.woff2 — 83.3 KiB — 67 ms — font-display: swap
Lato-Black.woff2 woff2 swap
Size 27 KB
Load time 49 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
Lato-Regular.woff2 woff2 swap
Size 28 KB
Load time 33 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
Lato-Bold.woff2 woff2 swap
Size 27 KB
Load time 49 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
RobotoSerif20pt-Regular... woff2 swap
Size 73 KB
Load time 40 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
RobotoSerif20pt-Medium.... woff2 swap
Size 83 KB
Load time 67 ms
Start 1.6 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
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
Network Waterfall
57 requests over 2272ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 3.8 s LCP 9.8 shttps://pewtrusts.org// https://pewtrusts.org/ — 301 — 119 B — 324 ms — h2https://www.pewtrusts.org/www.pewtrusts.org/ https://www.pewtrusts.org/ — 301 — 316 B — 77 ms — h2https://www.pew.org/www.pew.org/ https://www.pew.org/ — 302 — 297 B — 76 ms — h2https://www.pew.org/en/www.pew.org/en/ https://www.pew.org/en/ — 200 — 53.9 KiB — 508 ms — h2https://www.pew.org/assets/pew/css/index-generated.css?v=639083249695468357www.pew.org/assets/pew/css/index-ge... https://www.pew.org/assets/pew/css/index-generated.css?v=639083249695468357 — 200 — 43.1 KiB — 39 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 102 ms — h2https://www.pew.org/layouts/system/VisitorIdentification.jswww.pew.org/layouts/system/VisitorI... https://www.pew.org/layouts/system/VisitorIdentification.js — 200 — 1.1 KiB — 503 ms — h2https://www.pew.org/-/media/files/half-starburst.png?mw=454&hash=8D9830B19542507A35A1C49928494096www.pew.org/-/media/files/half-star... https://www.pew.org/-/media/files/half-starburst.png?mw=454&hash=8D9830B19542507A35A1C49928494096 — 200 — 8.1 KiB — 47 ms — h2https://www.pew.org/assets/pew/js/index-generated.js?v=639083249695468357www.pew.org/assets/pew/js/index-gen... https://www.pew.org/assets/pew/js/index-generated.js?v=639083249695468357 — 200 — 7.5 KiB — 57 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-W2Z5TTwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-W2Z5TT — 200 — 173.5 KiB — 203 ms — h2https://cdn.cookielaw.org/consent/01971223-921c-73e1-9838-ca434983f6aa/01971223-921c-73e1-9838-ca434983f6aa.jsoncdn.cookielaw.org/consent/01971223-... https://cdn.cookielaw.org/consent/01971223-921c-73e1-9838-ca434983f6aa/01971223-921c-73e1-9838-ca434983f6aa.json — 200 — 2.5 KiB — 73 ms — h2https://geolocation.onetrust.com/cookieconsentpub/v1/geo/locationgeolocation.onetrust.com/cookiecons... https://geolocation.onetrust.com/cookieconsentpub/v1/geo/location — 200 — 281 B — 104 ms — h2https://cdn.cookielaw.org/scripttemplates/202603.1.0/otBannerSdk.jscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202603.1.0/otBannerSdk.js — 200 — 129.9 KiB — 47 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=3&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fwww.pew.org%2Fen%2F&scrsrc=www.googletagmanager.com&rnd=1282713476.1776892713&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He64k0v6377222za200zd6377222xea&gcs=G100&gcd=13p3p3l2l5l1&dma_cps=a&dma=1&tag_exp=0~115616986~115938466~115938469~117266400&apve=1&apvf=f&apvc=1&tft=1776892713088&tfd=1357pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=3&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fwww.pew.org%2Fen%2F&scrsrc=www.googletagmanager.com&rnd=1282713476.1776892713&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He64k0v6377222za200zd6377222xea&gcs=G100&gcd=13p3p3l2l5l1&dma_cps=a&dma=1&tag_exp=0~115616986~115938466~115938469~117266400&apve=1&apvf=f&apvc=1&tft=1776892713088&tfd=1357 — 200 — 21 B — 114 ms — h3https://cdn.cookielaw.org/consent/01971223-921c-73e1-9838-ca434983f6aa/019d9283-42b0-7911-8fed-6dff4374d1a0/en.jsoncdn.cookielaw.org/consent/01971223-... https://cdn.cookielaw.org/consent/01971223-921c-73e1-9838-ca434983f6aa/019d9283-42b0-7911-8fed-6dff4374d1a0/en.json — 200 — 17.9 KiB — 30 ms — h2https://cdn.cookielaw.org/scripttemplates/202603.1.0/assets/otFlat.jsoncdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202603.1.0/assets/otFlat.json — 200 — 3.4 KiB — 24 ms — h2https://cdn.cookielaw.org/scripttemplates/202603.1.0/assets/v2/otPcCenter.jsoncdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202603.1.0/assets/v2/otPcCenter.json — 200 — 13.4 KiB — 26 ms — h2https://cdn.cookielaw.org/scripttemplates/202603.1.0/assets/otCommonStyles.csscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202603.1.0/assets/otCommonStyles.css — 200 — 4.7 KiB — 26 ms — h2https://www.pew.org/assets/Pew/assets/images/svg-sprite.svgwww.pew.org/assets/Pew/assets/image... https://www.pew.org/assets/Pew/assets/images/svg-sprite.svg — 200 — 4.9 KiB — 31 ms — h2https://www.pew.org/assets/Pew/expand-more.svgwww.pew.org/assets/Pew/expand-more.... https://www.pew.org/assets/Pew/expand-more.svg — 200 — 290 B — 30 ms — h2https://www.pew.org/-/media/post-launch-images/2025/11/plastic_wave/gettyimages1232418314jpgmaster.jpg?mw=800&hash=186257A8A7512D872567303FF60C4EFDwww.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2025/11/plastic_wave/gettyimages1232418314jpgmaster.jpg?mw=800&hash=186257A8A7512D872567303FF60C4EFD — 200 — 186.8 KiB — 76 ms — h2https://www.pew.org/-/media/post-launch-images/trust-magazine/winter-2026/accomplishments/img/20220831_pew_charitable_trust_philadelphia_sotc_day_1_49363_smaller/16x9_m.jpg?mw=800&hash=936A12A5CFE4D15D49D7E945D938529Fwww.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/trust-magazine/winter-2026/accomplishments/img/20220831_pew_charitable_trust_philadelphia_sotc_day_1_49363_smaller/16x9_m.jpg?mw=800&hash=936A12A5CFE4D15D49D7E945D938529F — 200 — 165.0 KiB — 72 ms — h2https://www.pew.org/-/media/post-launch-images/2026/04/kellysikkema0ozprxg5hkkunsplashjpgmaster/16x9_m.jpg?mw=800&hash=5C831F42315F2CE339DCE52E132ED202www.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2026/04/kellysikkema0ozprxg5hkkunsplashjpgmaster/16x9_m.jpg?mw=800&hash=5C831F42315F2CE339DCE52E132ED202 — 200 — 98.4 KiB — 72 ms — h2https://www.pew.org/-/media/post-launch-images/2025/03/taxrevenue-volatility-redojpgmaster_16x9_m.jpg?mw=800&hash=6EDDDC04F1660F347BC1230F27EBB1D9www.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2025/03/taxrevenue-volatility-redojpgmaster_16x9_m.jpg?mw=800&hash=6EDDDC04F1660F347BC1230F27EBB1D9 — 200 — 179.2 KiB — 82 ms — h2https://www.pew.org/-/media/post-launch-images/2025/12/gettyimages13100511491x1cropjpgmaster/16x9_m.jpg?mw=870&hash=2FB7E16C75A1ACF89D50F841C73C8A62www.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2025/12/gettyimages13100511491x1cropjpgmaster/16x9_m.jpg?mw=870&hash=2FB7E16C75A1ACF89D50F841C73C8A62 — 200 — 111.1 KiB — 81 ms — h2https://www.pew.org/assets/Pew/assets/fonts/Lato-Black.woff2www.pew.org/assets/Pew/assets/fonts... https://www.pew.org/assets/Pew/assets/fonts/Lato-Black.woff2 — 200 — 26.9 KiB — 49 ms — h2https://www.pew.org/assets/Pew/assets/fonts/Lato-Regular.woff2www.pew.org/assets/Pew/assets/fonts... https://www.pew.org/assets/Pew/assets/fonts/Lato-Regular.woff2 — 200 — 27.9 KiB — 33 ms — h2https://www.pew.org/assets/Pew/assets/fonts/Lato-Bold.woff2www.pew.org/assets/Pew/assets/fonts... https://www.pew.org/assets/Pew/assets/fonts/Lato-Bold.woff2 — 200 — 27.3 KiB — 49 ms — h2https://www.pew.org/assets/Pew/assets/fonts/RobotoSerif20pt-Regular.woff2www.pew.org/assets/Pew/assets/fonts... https://www.pew.org/assets/Pew/assets/fonts/RobotoSerif20pt-Regular.woff2 — 200 — 73.0 KiB — 40 ms — h2https://www.pew.org/assets/Pew/assets/fonts/RobotoSerif20pt-Medium.woff2www.pew.org/assets/Pew/assets/fonts... https://www.pew.org/assets/Pew/assets/fonts/RobotoSerif20pt-Medium.woff2 — 200 — 83.3 KiB — 67 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 3.8 s LCP 9.8 shttps://pewtrusts.org// https://pewtrusts.org/ — 301 — 119 B — 324 ms — h2https://www.pewtrusts.org/www.pewtrusts.org/ https://www.pewtrusts.org/ — 301 — 316 B — 77 ms — h2https://www.pew.org/www.pew.org/ https://www.pew.org/ — 302 — 297 B — 76 ms — h2https://www.pew.org/en/www.pew.org/en/ https://www.pew.org/en/ — 200 — 53.9 KiB — 508 ms — h2https://www.pew.org/assets/pew/css/index-generated.css?v=639083249695468357www.pew.org/assets/pew/css/index-ge... https://www.pew.org/assets/pew/css/index-generated.css?v=639083249695468357 — 200 — 43.1 KiB — 39 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 102 ms — h2https://www.pew.org/layouts/system/VisitorIdentification.jswww.pew.org/layouts/system/VisitorI... https://www.pew.org/layouts/system/VisitorIdentification.js — 200 — 1.1 KiB — 503 ms — h2https://www.pew.org/-/media/files/half-starburst.png?mw=454&hash=8D9830B19542507A35A1C49928494096www.pew.org/-/media/files/half-star... https://www.pew.org/-/media/files/half-starburst.png?mw=454&hash=8D9830B19542507A35A1C49928494096 — 200 — 8.1 KiB — 47 ms — h2https://www.pew.org/assets/pew/js/index-generated.js?v=639083249695468357www.pew.org/assets/pew/js/index-gen... https://www.pew.org/assets/pew/js/index-generated.js?v=639083249695468357 — 200 — 7.5 KiB — 57 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-W2Z5TTwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-W2Z5TT — 200 — 173.5 KiB — 203 ms — h2https://cdn.cookielaw.org/consent/01971223-921c-73e1-9838-ca434983f6aa/01971223-921c-73e1-9838-ca434983f6aa.jsoncdn.cookielaw.org/consent/01971223-... https://cdn.cookielaw.org/consent/01971223-921c-73e1-9838-ca434983f6aa/01971223-921c-73e1-9838-ca434983f6aa.json — 200 — 2.5 KiB — 73 ms — h2https://geolocation.onetrust.com/cookieconsentpub/v1/geo/locationgeolocation.onetrust.com/cookiecons... https://geolocation.onetrust.com/cookieconsentpub/v1/geo/location — 200 — 281 B — 104 ms — h2https://cdn.cookielaw.org/scripttemplates/202603.1.0/otBannerSdk.jscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202603.1.0/otBannerSdk.js — 200 — 129.9 KiB — 47 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=3&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fwww.pew.org%2Fen%2F&scrsrc=www.googletagmanager.com&rnd=1282713476.1776892713&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He64k0v6377222za200zd6377222xea&gcs=G100&gcd=13p3p3l2l5l1&dma_cps=a&dma=1&tag_exp=0~115616986~115938466~115938469~117266400&apve=1&apvf=f&apvc=1&tft=1776892713088&tfd=1357pagead2.googlesyndication.com/ccm/c... 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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 2510ms · 419KB · €27/mo
www.pew.org
Other
Costly
Execution 1336ms
Transfer 54 KB
Monthly Cost €15/mo
Unattributable
Other
Costly
Execution 372ms
Transfer 0 KB
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 280ms
Transfer 174 KB
Unused 39%
Monthly Cost €3/mo
OneTrust
Consent
Essential
Execution 209ms
Transfer 130 KB
Unused 53%
Monthly Cost €2/mo
js-agent.newrelic.com
Other
Optional
Execution 131ms
Transfer 30 KB
Monthly Cost €1/mo
www.pew.org
Other
Optional
Execution 118ms
Transfer 7 KB
Monthly Cost €1/mo
www.pew.org
Other
Optional
Execution 63ms
Transfer 24 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.pew.org adds 1336ms and costs ~€15/month
  • Unattributable adds 372ms and costs ~€4/month
  • Google Tag Manager adds 280ms and costs ~€3/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.pew.org takes 1336ms 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 372ms 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 280ms 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 OneTrust'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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