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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
85
GRADE
B
FIX
2
REVIEW
5
PASS
8
INFO
2

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

Mobile Desktop
64
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
66
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
91
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.

3.37 s

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

5.54 s

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

302 ms

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

0.000

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

4.76 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

10.27 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
8 PASS 5 REVIEW 2 FIX
D
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 (1.2 MiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
Page Weight Budget
1.2 MB transferred, 60 requests
REVIEW
1.2 MB transferred, 60 requests
Info::
Page weighs 2.1 MB (1.2 MB transferred)
Info::
Fonts are 315 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 315 KB
Info::
60 HTTP requests
Info::
Estimated 0.25 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
60 requests
0.25 g CO2 per page load
Images 516.1 KiB 42%
Fonts 314.8 KiB 25%
JavaScript 309.7 KiB 25%
CSS 65.0 KiB 5%
HTML 20.3 KiB 2%
Other 5.3 KiB 0%
Other 3.3 KiB 0%
Other 551 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget

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
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Info::
All images are well-optimized
17 images 516 KB
0 oversized -0 KB
16 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1952ms total JS execution
REVIEW
1952ms total JS execution
Warning::
https://www.niemanlab.org/cdn-cgi/challenge-platfo...: 594ms CPU time
Warning::
Unattributable: 345ms CPU time
Warning::
https://www.niemanlab.org/: 257ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-6QZX...: 256ms CPU time
Info::
https://assets.mailmunch.com/assets/widget_simple-...: 176ms CPU time
Warning::
Third-party scripts: 1952ms (100% of total)

Main Thread Breakdown

Script Evaluation 59% Other 20% Style & Layout 9% Script Parsing & Compilation 6% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.niemanlab.org/cdn-cgi/challenge-platform/scripts/jsd/main.js594ms557ms11ms3rd
Unattributable345ms32ms0ms3rd
https://www.niemanlab.org/257ms41ms2ms3rd
https://www.googletagmanager.com/gtag/js?id=G-6QZXQMZZ6C256ms202ms52ms3rd
https://assets.mailmunch.com/assets/widget_simple-f5a3e5db2f514f912e267a03f71350202672af937806defb072a316fb98ef272.js176ms74ms14ms3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js120ms91ms13ms3rd
https://www.niemanlab.org/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js107ms72ms7ms3rd
https://static.chartbeat.com/js/chartbeat.js98ms90ms5ms3rd
B
JS Bundles
13 scripts, 85 KB unused
REVIEW
13 scripts, 85 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-6QZX...: 63 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ajax.googleapis.com/ajax/libs/jquery/1.10....: 22 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 85 KB
85 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-6QZXQMZZ6C144 KB63 KB (44%)✓3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js?ver=1.10.133 KB22 KB (68%)✓3rd
https://www.niemanlab.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?12 KB—✓3rd
https://a.mailmunch.co/app/v1/site.js9 KB—✓3rd
https://static.cloudflareinsights.com/beacon.min.js11 KB—✓3rd
https://www.niemanlab.org/wordpress/wp-content/plugins/niemanlab-exit-popup/assets/popup.js?ver=6.91 KB—✓3rd
https://www.niemanlab.org/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js4 KB—✓3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js33 KB—✓3rd
https://static.chartbeat.com/js/chartbeat.js16 KB—✓3rd
blob:https://www.niemanlab.org/be2ca5cd-7cbb-4054-9176-6bcb0c125d99-0 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
Page Weight Inventory
Action
60 resources · 1.2 MB · 85 KB savings available
REVIEW
60 resources · 1.2 MB · 85 KB savings available
Warning::
Page weight 211 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~85 KB of savings available
Warning::
59 third-party resources (100% of weight)
60 resources · 1.2 MiB · 59 third-party 211.1 KiB over 1MB target
Image 42% · 517.7 KiB
Font 25% · 314.8 KiB
JavaScript 25% · 309.7 KiB
CSS 5% · 65.0 KiB
Document 2% · 23.9 KiB
Other 0% · 4.1 KiB

~84.9 KiB of savings available

Remove unused JavaScript: 84.9 KiB
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
10 fonts (315 KB)
PASS
10 fonts (315 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

315 KB total

Render-blocking

0

of 10

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 4.0 s 5.0 s FCP 3.4 s LCP 5.5 shttps://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book.woff2freight-sans-pro-book.w... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book.woff2 — 12.2 KiB — 20 ms — font-display: swaphttps://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-bold.woff2freight-sans-pro-bold.w... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-bold.woff2 — 12.6 KiB — 29 ms — font-display: swaphttps://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book-italic.woff2freight-sans-pro-book-i... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book-italic.woff2 — 13.3 KiB — 25 ms — font-display: swaphttps://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-display-pro-bold.woff2freight-display-pro-bol... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-display-pro-bold.woff2 — 26.0 KiB — 34 ms — font-display: swaphttps://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-text-pro-book.woff2freight-text-pro-book.w... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-text-pro-book.woff2 — 13.7 KiB — 28 ms — font-display: swaphttps://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-text-pro-bold.woff2freight-text-pro-bold.w... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-text-pro-bold.woff2 — 13.4 KiB — 27 ms — font-display: swaphttps://www.niemanlab.org/wordpress/wp-content/themes/Labby/resources/fontawesome-free-6.7.2/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://www.niemanlab.org/wordpress/wp-content/themes/Labby/resources/fontawesome-free-6.7.2/webfonts/fa-solid-900.woff2 — 155.1 KiB — 28 ms — font-display: swaphttps://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-light.woff2freight-sans-pro-light.... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-light.woff2 — 12.0 KiB — 26 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.0 KiB — 8 ms — font-display: swaphttps://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdu3cOWxw.woff26xKydSBYKcSV-LCoeQqfX1R... https://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdu3cOWxw.woff2 — 14.4 KiB — 7 ms — font-display: swap
freight-sans-pro-book.w... woff2 swap
Size 12 KB
Load time 20 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
freight-sans-pro-bold.w... woff2 swap
Size 13 KB
Load time 29 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
freight-sans-pro-book-i... woff2 swap
Size 13 KB
Load time 25 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
freight-display-pro-bol... woff2 swap
Size 26 KB
Load time 34 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
freight-text-pro-book.w... woff2 swap
Size 14 KB
Load time 28 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
freight-text-pro-bold.w... woff2 swap
Size 13 KB
Load time 27 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 155 KB
Load time 28 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
freight-sans-pro-light.... woff2 swap
Size 12 KB
Load time 26 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 8 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R... woff2 swap
Size 14 KB
Load time 7 ms
Start 1.8 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)

Fixing the unchecked items could save ~78 KB and ~156 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
60 requests over 1833ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 3.4 s LCP 5.5 shttps://niemanlab.org// https://niemanlab.org/ — 301 — 832 B — 1.1 s — h3https://www.niemanlab.org/www.niemanlab.org/ https://www.niemanlab.org/ — 200 — 20.3 KiB — 30 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book.woff2 — 200 — 12.2 KiB — 20 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-bold.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-bold.woff2 — 200 — 12.6 KiB — 29 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book-italic.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book-italic.woff2 — 200 — 13.3 KiB — 25 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-display-pro-bold.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-display-pro-bold.woff2 — 200 — 26.0 KiB — 34 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-text-pro-book.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-text-pro-book.woff2 — 200 — 13.7 KiB — 28 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-text-pro-bold.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-text-pro-bold.woff2 — 200 — 13.4 KiB — 27 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/quickconcat.php?files=newfront-styles-simple.css,niemanlab-shared.css,animate-custom.css,resources/fontawesome-free-6.7.2/css/fontawesome.min.css,resources/fontawesome-free-6.7.2/css/brands.min.css,resources/fontawesome-free-6.7.2/css/solid.min.css,resources/fontawesome-free-6.7.2/css/regular.min.css,SIMPLE-shared.css&qwerdlzpwww.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/quickconcat.php?files=newfront-styles-simple.css,niemanlab-shared.css,animate-custom.css,resources/fontawesome-free-6.7.2/css/fontawesome.min.css,resources/fontawesome-free-6.7.2/css/brands.min.css,resources/fontawesome-free-6.7.2/css/solid.min.css,resources/fontawesome-free-6.7.2/css/regular.min.css,SIMPLE-shared.css&qwerdlzp — 200 — 49.9 KiB — 70 ms — h3https://www.niemanlab.org/wordpress/wp-content/plugins/niemanlab-exit-popup/assets/popup.css?ver=6.9www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/plugins/niemanlab-exit-popup/assets/popup.css?ver=6.9 — 200 — 4.5 KiB — 61 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/resources/niemansitelogos/foundation-logo-color.svgwww.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/resources/niemansitelogos/foundation-logo-color.svg — 200 — 1.5 KiB — 26 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/resources/niemansitelogos/lab-logo-color-tighter.svgwww.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/resources/niemansitelogos/lab-logo-color-tighter.svg — 200 — 1.9 KiB — 23 ms — h3https://www.niemanlab.org/images/300funston-scaled-1-480x345.jpgwww.niemanlab.org/images/300funston... https://www.niemanlab.org/images/300funston-scaled-1-480x345.jpg — 200 — 29.6 KiB — 73 ms — h3https://www.niemanlab.org/images/kalshi-art-1-480x304.jpgwww.niemanlab.org/images/kalshi-art... https://www.niemanlab.org/images/kalshi-art-1-480x304.jpg — 200 — 10.1 KiB — 56 ms — h3https://www.niemanlab.org/images/Pittsburgh2-480x320.jpgwww.niemanlab.org/images/Pittsburgh... https://www.niemanlab.org/images/Pittsburgh2-480x320.jpg — 200 — 20.2 KiB — 71 ms — h3https://www.niemanlab.org/images/twitter-traffic-480x249.jpgwww.niemanlab.org/images/twitter-tr... https://www.niemanlab.org/images/twitter-traffic-480x249.jpg — 200 — 9.2 KiB — 59 ms — h3https://www.niemanlab.org/images/alexander-grey-8a5eJ1-mmQ-unsplash-480x320.jpgwww.niemanlab.org/images/alexander-... https://www.niemanlab.org/images/alexander-grey-8a5eJ1-mmQ-unsplash-480x320.jpg — 200 — 17.7 KiB — 64 ms — h3https://www.niemanlab.org/images/50097850092_cdf4c54c3d_c-480x320.jpgwww.niemanlab.org/images/5009785009... https://www.niemanlab.org/images/50097850092_cdf4c54c3d_c-480x320.jpg — 200 — 49.2 KiB — 80 ms — h3https://www.niemanlab.org/images/ProPublica-strike-Susan-DeCarava-480x360.jpgwww.niemanlab.org/images/ProPublica... https://www.niemanlab.org/images/ProPublica-strike-Susan-DeCarava-480x360.jpg — 200 — 55.5 KiB — 82 ms — h3https://www.niemanlab.org/images/USAMap-480x354.jpgwww.niemanlab.org/images/USAMap-480... https://www.niemanlab.org/images/USAMap-480x354.jpg — 200 — 18.1 KiB — 66 ms — h3https://www.niemanlab.org/images/chain-link-fence-links-adobe-480x270.jpgwww.niemanlab.org/images/chain-link... https://www.niemanlab.org/images/chain-link-fence-links-adobe-480x270.jpg — 200 — 21.9 KiB — 55 ms — h3https://www.niemanlab.org/images/archives-adobe-480x318.jpgwww.niemanlab.org/images/archives-a... https://www.niemanlab.org/images/archives-adobe-480x318.jpg — 200 — 43.7 KiB — 69 ms — h3https://www.niemanlab.org/images/ICE-Minneapolis-optimized-1-480x320.jpgwww.niemanlab.org/images/ICE-Minnea... https://www.niemanlab.org/images/ICE-Minneapolis-optimized-1-480x320.jpg — 200 — 38.2 KiB — 65 ms — h3https://www.niemanlab.org/images/V-Spehar-480x320.pngwww.niemanlab.org/images/V-Spehar-4... https://www.niemanlab.org/images/V-Spehar-480x320.png — 200 — 149.0 KiB — 88 ms — h3https://www.niemanlab.org/images/LocalJournalismProjectCondo-480x322.jpgwww.niemanlab.org/images/LocalJourn... https://www.niemanlab.org/images/LocalJournalismProjectCondo-480x322.jpg — 200 — 50.0 KiB — 79 ms — h3https://www.niemanlab.org/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.jswww.niemanlab.org/cdn-cgi/scripts/7... https://www.niemanlab.org/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js — 200 — 4.2 KiB — 28 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/newfront-styles-print.csswww.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/newfront-styles-print.css — 200 — 1.1 KiB — 27 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/resources/fontawesome-free-6.7.2/webfonts/fa-solid-900.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/resources/fontawesome-free-6.7.2/webfonts/fa-solid-900.woff2 — 200 — 155.1 KiB — 28 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-light.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-light.woff2 — 200 — 12.0 KiB — 26 ms — h3https://www.niemanlab.org/wordpress/wp-content/plugins/niemanlab-exit-popup/assets/popup.js?ver=6.9www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/plugins/niemanlab-exit-popup/assets/popup.js?ver=6.9 — 200 — 1.2 KiB — 19 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 3.4 s LCP 5.5 shttps://niemanlab.org// https://niemanlab.org/ — 301 — 832 B — 1.1 s — h3https://www.niemanlab.org/www.niemanlab.org/ https://www.niemanlab.org/ — 200 — 20.3 KiB — 30 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book.woff2 — 200 — 12.2 KiB — 20 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-bold.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-bold.woff2 — 200 — 12.6 KiB — 29 ms — h3https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book-italic.woff2www.niemanlab.org/wordpress/wp-cont... https://www.niemanlab.org/wordpress/wp-content/themes/Labby/webfonts/freight-sans-pro-book-italic.woff2 — 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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 1952ms · 218KB · $26/mo
www.niemanlab.org
Other
Costly
Execution 594ms
Transfer 0 KB
Monthly Cost $8/mo
Unattributable
Other
Costly
Execution 345ms
Transfer 0 KB
Monthly Cost $5/mo
www.niemanlab.org
Other
Costly
Execution 257ms
Transfer 20 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Costly
Execution 256ms
Transfer 144 KB
Unused 44%
Monthly Cost $3/mo
assets.mailmunch.com
Other
Optional
Execution 176ms
Transfer 1 KB
Monthly Cost $2/mo
ajax.googleapis.com
Other
Optional
Execution 120ms
Transfer 33 KB
Monthly Cost $2/mo
www.niemanlab.org
Other
Optional
Execution 107ms
Transfer 4 KB
Monthly Cost $1/mo
static.chartbeat.com
Other
Optional
Execution 98ms
Transfer 16 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.niemanlab.org adds 594ms and costs ~$8/month
  • Unattributable adds 345ms and costs ~$5/month
  • www.niemanlab.org adds 257ms and costs ~$3/month
  • Google Tag Manager adds 256ms 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.niemanlab.org takes 594ms 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 345ms 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

www.niemanlab.org takes 257ms 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 256ms 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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