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https://pewtrusts.org

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
4
REVIEW
4
PASS
5
INFO
2

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

Mobile Desktop
75
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
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.

1.36 s

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

3.34 s

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

0 ms

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

0.003

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

1.92 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.

3.34 s

Page Load Progression

475 ms
950 ms
1.4 s
1.9 s
2.4 s
2.8 s
3.3 s
3.8 s
Checks
15
5 PASS 4 REVIEW 4 FIX
F
Page Weight Budget
Action
3.9 MB transferred, 60 requests
FIX
3.9 MB transferred, 60 requests
Warning::
Page weighs 5.0 MB (3.9 MB transferred)
Warning::
Images are 3.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.3 MB
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::
60 HTTP requests
Info::
Estimated 0.82 g CO2 per page load
3.9 MB / 2.4 MB budget
3.9 MB transferred
60 requests
0.82 g CO2 per page load
Images 3.3 MiB 84%
JavaScript 295.1 KiB 7%
Fonts 238.4 KiB 6%
HTML 53.8 KiB 1%
CSS 43.1 KiB 1%
Other 11.3 KiB 0%
Other 1.9 KiB 0%
Other 21 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

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
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 (3.9 MiB of 3.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
60 resources · 3.9 MB · 69 KB savings available
FIX
60 resources · 3.9 MB · 69 KB savings available
Warning::
Page weight 2.9 MB over 1MB target
Got: 3.9 MB Expected: ≤ 1 MB
Info::
~69 KB of savings available
Warning::
59 third-party resources (100% of weight)
Info::
5 resources over 200KB
60 resources · 3.9 MiB · 59 third-party 2.9 MiB over 1MB target
Image 84% · 3.3 MiB
JavaScript 7% · 295.1 KiB
Font 6% · 238.4 KiB
Document 1% · 54.5 KiB
CSS 1% · 43.1 KiB
Other 0% · 740 B

~69.1 KiB of savings available

Remove unused JavaScript: 69.1 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.

B
Image Optimization
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Info::
All images are well-optimized
21 images 3.3 MB
0 oversized -0 KB
18 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
511ms total JS execution
REVIEW
511ms total JS execution
Warning::
https://www.pew.org/en/: 352ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-W2Z...: 87ms CPU time
Info::
Unattributable: 72ms CPU time
Warning::
Third-party scripts: 511ms (100% of total)

Main Thread Breakdown

Style & Layout 30% Other 30% Script Evaluation 26% Rendering 10% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://www.pew.org/en/352ms35ms4ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W2Z5TT87ms74ms12ms3rd
Unattributable72ms4ms0ms3rd
B
JS Bundles
22 scripts, 69 KB unused
REVIEW
22 scripts, 69 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-W2Z...: 69 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 69 KB
69 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-W2Z5TT174 KB69 KB (40%)✓3rd
https://www.pew.org/assets/pew/js/chunks/SkipLink.init-0e59ee1a.js0 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
https://www.pew.org/assets/Pew/js/chunks/RichTextField.init-096c9b19.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

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 1.0 s 2.0 s 3.0 s FCP 1.4 s LCP 3.3 shttps://www.pew.org/assets/Pew/assets/fonts/Lato-Black.woff2Lato-Black.woff2 https://www.pew.org/assets/Pew/assets/fonts/Lato-Black.woff2 — 27.0 KiB — 32 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 — 30 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 — 55 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 — 72.9 KiB — 55 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 — 83.2 KiB — 60 ms — font-display: swap
Lato-Black.woff2 woff2 swap
Size 27 KB
Load time 32 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
Lato-Bold.woff2 woff2 swap
Size 27 KB
Load time 30 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
Lato-Regular.woff2 woff2 swap
Size 28 KB
Load time 55 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
RobotoSerif20pt-Regular... woff2 swap
Size 73 KB
Load time 55 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
RobotoSerif20pt-Medium.... woff2 swap
Size 83 KB
Load time 60 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
Network Waterfall
60 requests over 2119ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.4 s LCP 3.3 shttps://pewtrusts.org// https://pewtrusts.org/ — 301 — 119 B — 305 ms — h2https://www.pewtrusts.org/www.pewtrusts.org/ https://www.pewtrusts.org/ — 301 — 316 B — 70 ms — h2https://www.pew.org/www.pew.org/ https://www.pew.org/ — 302 — 297 B — 69 ms — h2https://www.pew.org/en/www.pew.org/en/ https://www.pew.org/en/ — 200 — 53.8 KiB — 516 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 62 ms — https://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 — 40 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 — 511 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 — 29 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 — 30 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 — 181 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=8&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fwww.pew.org%2Fen%2F&scrsrc=www.googletagmanager.com&rnd=2060492262.1776892729&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He64k0v6377222za200zd6377222xea&gcs=G100&gcd=13p3p3l2l5l1&dma_cps=a&dma=1&tag_exp=0~115938465~115938469~117266401&apve=1&apvf=f&apvc=1&tft=1776892728655&tfd=1290pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=8&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fwww.pew.org%2Fen%2F&scrsrc=www.googletagmanager.com&rnd=2060492262.1776892729&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He64k0v6377222za200zd6377222xea&gcs=G100&gcd=13p3p3l2l5l1&dma_cps=a&dma=1&tag_exp=0~115938465~115938469~117266401&apve=1&apvf=f&apvc=1&tft=1776892728655&tfd=1290 — 200 — 21 B — 87 ms — h3https://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 — 29 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 — 27 ms — h2https://www.pew.org/-/media/post-launch-images/2025/11/plastic_wave/gettyimages1232418314jpgmaster.jpg?mw=1600&hash=B60FDAF8426DA985C5C46B698CE86ED4www.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2025/11/plastic_wave/gettyimages1232418314jpgmaster.jpg?mw=1600&hash=B60FDAF8426DA985C5C46B698CE86ED4 — 200 — 671.9 KiB — 94 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=1600&hash=40B9B203C0A794A35BCFC3DC981EA755www.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=1600&hash=40B9B203C0A794A35BCFC3DC981EA755 — 200 — 504.7 KiB — 106 ms — h2https://www.pew.org/-/media/post-launch-images/2026/04/kellysikkema0ozprxg5hkkunsplashjpgmaster/16x9_m.jpg?mw=1600&hash=1BE759FBF11A2CF635AA5591A3B94A7Bwww.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2026/04/kellysikkema0ozprxg5hkkunsplashjpgmaster/16x9_m.jpg?mw=1600&hash=1BE759FBF11A2CF635AA5591A3B94A7B — 200 — 294.9 KiB — 536 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 — 179.3 KiB — 105 ms — h2https://www.pew.org/-/media/assets/after-the-fact/175/ep175_mainwebimage.png?mw=650&hash=60C8DFE35E03F0BE4CC10A812A635508www.pew.org/-/media/assets/after-th... https://www.pew.org/-/media/assets/after-the-fact/175/ep175_mainwebimage.png?mw=650&hash=60C8DFE35E03F0BE4CC10A812A635508 — 200 — 151.1 KiB — 108 ms — h2https://www.pew.org/-/media/post-launch-images/2026/04/prc_ruraldatacenters.jpg?mw=800&hash=F77ED04C00935B6068F1D87A0BF2D5CAwww.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2026/04/prc_ruraldatacenters.jpg?mw=800&hash=F77ED04C00935B6068F1D87A0BF2D5CA — 200 — 105.9 KiB — 111 ms — h2https://www.pew.org/-/media/post-launch-images/2026/04/photo-master/16x9_s.jpg?mw=800&hash=54B30639E6470B6FCDFAEB7057A353D3www.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2026/04/photo-master/16x9_s.jpg?mw=800&hash=54B30639E6470B6FCDFAEB7057A353D3 — 200 — 166.3 KiB — 115 ms — h2https://www.pew.org/-/media/post-launch-images/2026/03/gettyimages2256263952jpgmaster/16x9_m.jpg?mw=800&hash=AB2248166B8A000F1F07F61E80D1B18Dwww.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2026/03/gettyimages2256263952jpgmaster/16x9_m.jpg?mw=800&hash=AB2248166B8A000F1F07F61E80D1B18D — 200 — 166.0 KiB — 116 ms — h2https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/gettyimages-1133658086/16x9_m.jpg?mw=352&hash=A00989387D9325D5C54D2D10DEF1D0FBwww.pew.org/-/media/images/branding... https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/gettyimages-1133658086/16x9_m.jpg?mw=352&hash=A00989387D9325D5C54D2D10DEF1D0FB — 200 — 15.3 KiB — 115 ms — h2https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/hly6818jpgmaster/16x9_m.jpg?mw=352&hash=2DEE838E8E27A3539B6EAF80457932EFwww.pew.org/-/media/images/branding... https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/hly6818jpgmaster/16x9_m.jpg?mw=352&hash=2DEE838E8E27A3539B6EAF80457932EF — 200 — 29.7 KiB — 115 ms — h2https://www.pew.org/-/media/post-launch-images/2018/12/cit_residentialstreet_raw_km_rf-(1)/16x9_m.jpg?mw=352&hash=5394D3C3222DC77A0FAB569584F50D98www.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2018/12/cit_residentialstreet_raw_km_rf-(1)/16x9_m.jpg?mw=352&hash=5394D3C3222DC77A0FAB569584F50D98 — 200 — 30.1 KiB — 117 ms — h2https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/gettyimages-2186187229-2880/gettyimages-2186187229-16x9.jpg?mw=352&hash=2D665CA95F337294B22EFB2B4DAD5053www.pew.org/-/media/images/branding... https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/gettyimages-2186187229-2880/gettyimages-2186187229-16x9.jpg?mw=352&hash=2D665CA95F337294B22EFB2B4DAD5053 — 200 — 44.1 KiB — 118 ms — h2https://www.pew.org/-/media/post-launch-images/trust-magazine/winter-2021/ontherecord_promoimage16x9-1.jpg?mw=352&hash=B92425FAD6A59B3C95C7B2F0681A07B2www.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/trust-magazine/winter-2021/ontherecord_promoimage16x9-1.jpg?mw=352&hash=B92425FAD6A59B3C95C7B2F0681A07B2 — 200 — 35.2 KiB — 116 ms — h2https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/gettyimages-945840366_2880/16x9_s.jpg?mw=352&hash=7C82594F243F6CF4CF8579BBD01A2BB7www.pew.org/-/media/images/branding... https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/gettyimages-945840366_2880/16x9_s.jpg?mw=352&hash=7C82594F243F6CF4CF8579BBD01A2BB7 — 200 — 36.7 KiB — 123 ms — h2https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/gettyimages587037301jpgmaster/16x9_m.jpg?mw=352&hash=39837A6A1193F3D0900602461EA1D8BDwww.pew.org/-/media/images/branding... https://www.pew.org/-/media/images/branding-and-banners/topics/new_topics/gettyimages587037301jpgmaster/16x9_m.jpg?mw=352&hash=39837A6A1193F3D0900602461EA1D8BD — 200 — 24.8 KiB — 122 ms — h2https://www.pew.org/-/media/files/starburst-right.pngwww.pew.org/-/media/files/starburst... https://www.pew.org/-/media/files/starburst-right.png — 200 — 10.1 KiB — 122 ms — h2https://www.pew.org/-/media/post-launch-images/2025/12/gettyimages13100511491x1cropjpgmaster.jpg?mw=1450&hash=368096B1358B08ECB453C29403D59A5Cwww.pew.org/-/media/post-launch-ima... https://www.pew.org/-/media/post-launch-images/2025/12/gettyimages13100511491x1cropjpgmaster.jpg?mw=1450&hash=368096B1358B08ECB453C29403D59A5C — 200 — 469.8 KiB — 132 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 1.4 s LCP 3.3 shttps://pewtrusts.org// https://pewtrusts.org/ — 301 — 119 B — 305 ms — h2https://www.pewtrusts.org/www.pewtrusts.org/ https://www.pewtrusts.org/ — 301 — 316 B — 70 ms — h2https://www.pew.org/www.pew.org/ https://www.pew.org/ — 302 — 297 B — 69 ms — h2https://www.pew.org/en/www.pew.org/en/ https://www.pew.org/en/ — 200 — 53.8 KiB — 516 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 62 ms — https://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 — 40 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 — 511 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 — 29 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 — 30 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 — 181 ms — 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https://bam.nr-data.net/1/NRJS-fde545555ce3fb6aa68?a=1793650477&v=1.313.1&to=MlVWbRRQW0BUUkJaXAsfY1wEQVRUUB5%2BXF4AQFVeAw%3D%3D&rst=1801&ck=0&s=c27bcc810f4e319a&ref=https://www.pew.org/en/&ptid=02496b9be8235d63&af=err,spa,xhr,stn,ins&ap=292&be=960&fe=791&dc=762&fsh=1&perf=%7B%22timing%22:%7B%22of%22:1776892727364,%22n%22:0,%22f%22:447,%22dn%22:447,%22dne%22:447,%22c%22:447,%22s%22:447,%22ce%22:447,%22rq%22:448,%22rp%22:960,%22rpe%22:964,%22di%22:1595,%22ds%22:1701,%22de%22:1722,%22dc%22:1749,%22l%22:1749,%22le%22:1751%7D,%22navigation%22:%7B%7D%7D&fp=1620&fcp=1620 — 200 — 719 B — 124 ms — http/1.1https://bam.nr-data.net/events/1/NRJS-fde545555ce3fb6aa68?a=1793650477&v=1.313.1&to=MlVWbRRQW0BUUkJaXAsfY1wEQVRUUB5%2BXF4AQFVeAw%3D%3D&rst=1934&ck=0&s=c27bcc810f4e319a&ref=https://www.pew.org/en/&ptid=02496b9be8235d63bam.nr-data.net/events/1/NRJS-fde54... https://bam.nr-data.net/events/1/NRJS-fde545555ce3fb6aa68?a=1793650477&v=1.313.1&to=MlVWbRRQW0BUUkJaXAsfY1wEQVRUUB5%2BXF4AQFVeAw%3D%3D&rst=1934&ck=0&s=c27bcc810f4e319a&ref=https://www.pew.org/en/&ptid=02496b9be8235d63 — 200 — 408 B — 101 ms — http/1.1https://bam.nr-data.net/jserrors/1/NRJS-fde545555ce3fb6aa68?a=1793650477&v=1.313.1&to=MlVWbRRQW0BUUkJaXAsfY1wEQVRUUB5%2BXF4AQFVeAw%3D%3D&rst=1936&ck=0&s=c27bcc810f4e319a&ref=https://www.pew.org/en/&ptid=02496b9be8235d63bam.nr-data.net/jserrors/1/NRJS-fde... https://bam.nr-data.net/jserrors/1/NRJS-fde545555ce3fb6aa68?a=1793650477&v=1.313.1&to=MlVWbRRQW0BUUkJaXAsfY1wEQVRUUB5%2BXF4AQFVeAw%3D%3D&rst=1936&ck=0&s=c27bcc810f4e319a&ref=https://www.pew.org/en/&ptid=02496b9be8235d63 — 200 — 413 B — 175 ms — http/1.1https://bam.nr-data.net/events/1/NRJS-fde545555ce3fb6aa68?a=1793650477&v=1.313.1&to=MlVWbRRQW0BUUkJaXAsfY1wEQVRUUB5%2BXF4AQFVeAw%3D%3D&rst=1937&ck=0&s=c27bcc810f4e319a&ref=https://www.pew.org/en/&ptid=02496b9be8235d63bam.nr-data.net/events/1/NRJS-fde54... https://bam.nr-data.net/events/1/NRJS-fde545555ce3fb6aa68?a=1793650477&v=1.313.1&to=MlVWbRRQW0BUUkJaXAsfY1wEQVRUUB5%2BXF4AQFVeAw%3D%3D&rst=1937&ck=0&s=c27bcc810f4e319a&ref=https://www.pew.org/en/&ptid=02496b9be8235d63 — 200 — 408 B — 111 ms — http/1.1
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 511ms · 227KB · €6/mo
www.pew.org
Other
Costly
Execution 352ms
Transfer 54 KB
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Optional
Execution 87ms
Transfer 174 KB
Unused 40%
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 72ms
Transfer 0 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.pew.org adds 352ms and costs ~€4/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 352ms 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

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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