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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
94
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
80
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

1.07 s

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

1.35 s

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

12 ms

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

0.011

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

1.07 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.

2.91 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
6 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
6.2 MB transferred, 119 requests
FIX
6.2 MB transferred, 119 requests
Critical::
Page weighs 8.5 MB (6.2 MB transferred)
Warning::
Images are 5.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 5.0 MB
Warning::
JavaScript is 914 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 914 KB
Warning::
119 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.3 g CO2 per page load
6.2 MB / 2.4 MB budget
6.2 MB transferred
119 requests
1.3 g CO2 per page load
Images 5.0 MiB 81%
JavaScript 914.0 KiB 14%
Fonts 147.4 KiB 2%
CSS 83.8 KiB 1%
HTML 37.5 KiB 1%
Other 7.8 KiB 0%
Other 1.9 KiB 0%
Other 1.8 KiB 0%
Other 667 B 0%
Other 607 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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (6.2 MiB of 6.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
31 scripts, 345 KB unused
FIX
31 scripts, 345 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-ZHFV...: 108 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-C5E5...: 67 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-ZHFV...: 63 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-129...: 63 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.onesignal.com/sdks/OneSignalPageSDKES6...: 44 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 345 KB
345 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-ZHFVHJ3CMZ&cx=c&gtm=4e64k0h2155 KB108 KB (70%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-C5E5Q186GT&cx=c&gtm=4e64k0h2159 KB67 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-ZHFVHJ3CMZ155 KB63 KB (41%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-12973256-1117 KB63 KB (54%)✓3rd
https://cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=15160769 KB44 KB (64%)✓3rd
https://news.mongabay.com/wp-content/plugins/progressive-wp/assets/scripts/ui-installprompt.js1 KB—✓3rd
https://www.clarity.ms/tag/hghawiq8qp1 KB—✓3rd
https://js.hs-scripts.com/5981609.js?integration=WordPress&ver=11.3.161 KB—✓3rd
https://news.mongabay.com/wp-content/themes/mongabay_v2/js/lib/slick/slick.min.js12 KB—✓3rd
https://news.mongabay.com/wp-content/themes/mongabay_v2/js/slick-init.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

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

D
Page Weight Inventory
Action
119 resources · 6.2 MB · 345 KB savings available
FIX
119 resources · 6.2 MB · 345 KB savings available
Warning::
Page weight 5.2 MB over 1MB target
Got: 6.2 MB Expected: ≤ 1 MB
Info::
~345 KB of savings available
Warning::
118 third-party resources (100% of weight)
Info::
8 resources over 200KB
119 resources · 6.2 MiB · 118 third-party 5.2 MiB over 1MB target
Image 81% · 5.0 MiB
JavaScript 14% · 914.2 KiB
Font 2% · 147.4 KiB
CSS 1% · 83.8 KiB
Document 1% · 38.1 KiB
Other 0% · 6.1 KiB

~344.9 KiB of savings available

Remove unused JavaScript: 344.9 KiB
C
Image Optimization
Action
45 images, 0 KB saveable
REVIEW
45 images, 0 KB saveable
Warning::
https://news.mongabay.com/wp-content/themes/mongab... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://imgs.mongabay.com/wp-content/uploads/sites... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://imgs.mongabay.com/wp-content/uploads/sites... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://imgs.mongabay.com/wp-content/uploads/sites... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
45 images 5.0 MB
0 oversized -0 KB
44 legacy format
4 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

C
JS Execution Cost
Action
1246ms total JS execution
REVIEW
1246ms total JS execution
Warning::
https://news.mongabay.com/: 321ms CPU time
Warning::
Unattributable: 274ms CPU time
Info::
https://js.hs-analytics.net/analytics/177681300000...: 174ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-ZHFV...: 77ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-C5E5...: 77ms CPU time
Warning::
Third-party scripts: 1246ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Other 23% Style & Layout 19% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://news.mongabay.com/321ms19ms4ms3rd
Unattributable274ms10ms0ms3rd
https://js.hs-analytics.net/analytics/1776813000000/5981609.js174ms114ms3ms3rd
https://www.googletagmanager.com/gtag/js?id=G-ZHFVHJ3CMZ77ms61ms15ms3rd
https://www.googletagmanager.com/gtag/js?id=G-C5E5Q186GT&cx=c&gtm=4e64k0h277ms64ms12ms3rd
https://news.mongabay.com/cdn-cgi/challenge-platform/scripts/jsd/main.js71ms68ms1ms3rd
https://cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=15160771ms50ms7ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js67ms56ms4ms3rd
https://news.mongabay.com/wp-includes/js/jquery/jquery.min.js59ms41ms2ms3rd
https://news.mongabay.com/wp-content/themes/mongabay_v2/js/slick-init.js55ms33ms0ms3rd
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 (147 KB)
PASS
5 fonts (147 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

147 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 500 ms 1.0 s FCP 1.1 s LCP 1.4 shttps://news.mongabay.com/wp-content/plugins/bloom/core/admin/fonts/modules.ttfmodules.ttf https://news.mongabay.com/wp-content/plugins/bloom/core/admin/fonts/modules.ttf — 90.5 KiB — 79 ms — font-display: swaphttps://fonts.gstatic.com/s/publicsans/v21/ijwRs572Xtc6ZYQws9YVwnNGfJ7QwOk1.woff2ijwRs572Xtc6ZYQws9YVwnN... https://fonts.gstatic.com/s/publicsans/v21/ijwRs572Xtc6ZYQws9YVwnNGfJ7QwOk1.woff2 — 26.0 KiB — 12 ms — font-display: swaphttps://news.mongabay.com/wp-content/themes/mongabay_v2/fonts/fontello.woff2?92304975fontello.woff2 https://news.mongabay.com/wp-content/themes/mongabay_v2/fonts/fontello.woff2?92304975 — 3.5 KiB — 19 ms — font-display: swaphttps://news.mongabay.com/wp-content/themes/mongabay_v2/fonts/Rowan-Regular.woffRowan-Regular.woff https://news.mongabay.com/wp-content/themes/mongabay_v2/fonts/Rowan-Regular.woff — 25.9 KiB — 16 ms — font-display: swaphttps://news.mongabay.com/wp-content/themes/mongabay_v2/js/lib/slick/fonts/slick.woffslick.woff https://news.mongabay.com/wp-content/themes/mongabay_v2/js/lib/slick/fonts/slick.woff — 1.5 KiB — 20 ms — font-display: swap
modules.ttf ttf swap
Size 90 KB
Load time 79 ms
Start 212 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ijwRs572Xtc6ZYQws9YVwnN... woff2 swap
Size 26 KB
Load time 12 ms
Start 522 ms
Risk FOUT — text flashes from fallback to web font
fontello.woff2 woff2 swap
Size 4 KB
Load time 19 ms
Start 523 ms
Risk FOUT — text flashes from fallback to web font
Rowan-Regular.woff woff swap
Size 26 KB
Load time 16 ms
Start 523 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
slick.woff woff swap
Size 2 KB
Load time 20 ms
Start 773 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~35 KB and ~70 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, must-revalidate
Info::
Effective TTL: 10 minutes (max-age=600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=600, must-revalidate

DirectiveValueMeaning
max-age600Cache for 10 minutes
must-revalidate—Must recheck with server after expiry
Effective TTL: 600 seconds
Network Waterfall
119 requests over 3759ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.1 s LCP 1.4 shttps://mongabay.com// https://mongabay.com/ — 301 — 554 B — 72 ms — h2https://news.mongabay.com/news.mongabay.com/ https://news.mongabay.com/ — 200 — 37.5 KiB — 152 ms — h2https://www.googletagmanager.com/gtag/js?id=UA-12973256-1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=UA-12973256-1 — 200 — 116.7 KiB — 155 ms — h2https://fonts.googleapis.com/css2?family=Public+Sans:ital,wght@0,100..900;1,100..900&display=swapfonts.googleapis.com/css2?family=Pu... https://fonts.googleapis.com/css2?family=Public+Sans:ital,wght@0,100..900;1,100..900&display=swap — 200 — 997 B — 144 ms — h2https://news.mongabay.com/wp-content/plugins/drop-shadow-boxes/css/dropshadowboxes.cssnews.mongabay.com/wp-content/plugin... https://news.mongabay.com/wp-content/plugins/drop-shadow-boxes/css/dropshadowboxes.css — 200 — 1.5 KiB — 44 ms — h2https://news.mongabay.com/wp-includes/css/dist/components/style.min.cssnews.mongabay.com/wp-includes/css/d... https://news.mongabay.com/wp-includes/css/dist/components/style.min.css — 200 — 14.7 KiB — 50 ms — h2https://news.mongabay.com/wp-includes/css/dist/preferences/style.min.cssnews.mongabay.com/wp-includes/css/d... https://news.mongabay.com/wp-includes/css/dist/preferences/style.min.css — 200 — 447 B — 47 ms — h2https://news.mongabay.com/wp-includes/css/dist/block-editor/style.min.cssnews.mongabay.com/wp-includes/css/d... https://news.mongabay.com/wp-includes/css/dist/block-editor/style.min.css — 200 — 16.7 KiB — 52 ms — h2https://news.mongabay.com/wp-includes/css/dist/reusable-blocks/style.min.cssnews.mongabay.com/wp-includes/css/d... https://news.mongabay.com/wp-includes/css/dist/reusable-blocks/style.min.css — 200 — 407 B — 35 ms — h2https://news.mongabay.com/wp-includes/css/dist/patterns/style.min.cssnews.mongabay.com/wp-includes/css/d... https://news.mongabay.com/wp-includes/css/dist/patterns/style.min.css — 200 — 746 B — 36 ms — h2https://news.mongabay.com/wp-includes/css/dist/editor/style.min.cssnews.mongabay.com/wp-includes/css/d... https://news.mongabay.com/wp-includes/css/dist/editor/style.min.css — 200 — 10.3 KiB — 50 ms — h2https://news.mongabay.com/wp-content/plugins/drop-shadow-boxes/block/blocks.style.build.cssnews.mongabay.com/wp-content/plugin... https://news.mongabay.com/wp-content/plugins/drop-shadow-boxes/block/blocks.style.build.css — 200 — 1.4 KiB — 43 ms — h2https://news.mongabay.com/wp-content/plugins/progressive-wp/assets/styles/ui-offline.cssnews.mongabay.com/wp-content/plugin... https://news.mongabay.com/wp-content/plugins/progressive-wp/assets/styles/ui-offline.css — 200 — 348 B — 59 ms — h2https://news.mongabay.com/wp-content/themes/mongabay_v2/js/lib/slick/slick.cssnews.mongabay.com/wp-content/themes... https://news.mongabay.com/wp-content/themes/mongabay_v2/js/lib/slick/slick.css — 200 — 627 B — 53 ms — h2https://news.mongabay.com/wp-content/themes/mongabay_v2/js/lib/slick/slick-theme.cssnews.mongabay.com/wp-content/themes... https://news.mongabay.com/wp-content/themes/mongabay_v2/js/lib/slick/slick-theme.css — 200 — 956 B — 56 ms — h2https://news.mongabay.com/wp-content/themes/mongabay_v2/css/style.cssnews.mongabay.com/wp-content/themes... https://news.mongabay.com/wp-content/themes/mongabay_v2/css/style.css — 200 — 12.3 KiB — 54 ms — h2https://news.mongabay.com/wp-content/themes/mongabay_v2/css/fontello.cssnews.mongabay.com/wp-content/themes... https://news.mongabay.com/wp-content/themes/mongabay_v2/css/fontello.css — 200 — 1.1 KiB — 50 ms — h2https://news.mongabay.com/wp-content/themes/mongabay_v2/css/addtohomescreen.min.cssnews.mongabay.com/wp-content/themes... https://news.mongabay.com/wp-content/themes/mongabay_v2/css/addtohomescreen.min.css — 200 — 5.2 KiB — 59 ms — h3https://news.mongabay.com/wp-content/themes/mongabay_v2/css/dialog-polyfill.cssnews.mongabay.com/wp-content/themes... https://news.mongabay.com/wp-content/themes/mongabay_v2/css/dialog-polyfill.css — 200 — 494 B — 63 ms — h3https://news.mongabay.com/wp-content/uploads/sites/20/tablepress-combined.min.cssnews.mongabay.com/wp-content/upload... https://news.mongabay.com/wp-content/uploads/sites/20/tablepress-combined.min.css — 200 — 2.6 KiB — 65 ms — h3https://news.mongabay.com/wp-includes/js/jquery/jquery.min.jsnews.mongabay.com/wp-includes/js/jq... https://news.mongabay.com/wp-includes/js/jquery/jquery.min.js — 200 — 31.0 KiB — 73 ms — h3https://news.mongabay.com/wp-includes/js/jquery/jquery-migrate.min.jsnews.mongabay.com/wp-includes/js/jq... https://news.mongabay.com/wp-includes/js/jquery/jquery-migrate.min.js — 200 — 5.1 KiB — 73 ms — h3https://news.mongabay.com/wp-content/plugins/bloom/core/admin/fonts/modules.ttfnews.mongabay.com/wp-content/plugin... https://news.mongabay.com/wp-content/plugins/bloom/core/admin/fonts/modules.ttf — 200 — 90.5 KiB — 79 ms — h3https://cdn.knightlab.com/libs/soundcite/latest/css/player.csscdn.knightlab.com/libs/soundcite/la... https://cdn.knightlab.com/libs/soundcite/latest/css/player.css — 200 — 1.2 KiB — 65 ms — h3https://news.mongabay.com/wp-content/plugins/soliloquy/assets/css/soliloquy.cssnews.mongabay.com/wp-content/plugin... https://news.mongabay.com/wp-content/plugins/soliloquy/assets/css/soliloquy.css — 200 — 2.4 KiB — 56 ms — h3https://news.mongabay.com/wp-content/themes/mongabay_v2/img/logo/mongabay_logo_news_black.svgnews.mongabay.com/wp-content/themes... https://news.mongabay.com/wp-content/themes/mongabay_v2/img/logo/mongabay_logo_news_black.svg — 200 — 6.3 KiB — 66 ms — h3https://news.mongabay.com/wp-content/themes/mongabay_v2/img/logo/mongabay_logo_news_white.svgnews.mongabay.com/wp-content/themes... https://news.mongabay.com/wp-content/themes/mongabay_v2/img/logo/mongabay_logo_news_white.svg — 200 — 6.4 KiB — 65 ms — h3https://imgs.mongabay.com/wp-content/uploads/sites/20/2026/04/21211556/IMG_3726-350x233.jpegimgs.mongabay.com/wp-content/upload... https://imgs.mongabay.com/wp-content/uploads/sites/20/2026/04/21211556/IMG_3726-350x233.jpeg — 200 — 13.4 KiB — 95 ms — h2https://imgs.mongabay.com/wp-content/uploads/sites/20/2026/04/21162400/black-rhinos-africa-768x512.jpgimgs.mongabay.com/wp-content/upload... https://imgs.mongabay.com/wp-content/uploads/sites/20/2026/04/21162400/black-rhinos-africa-768x512.jpg — 200 — 100.3 KiB — 26 ms — h2https://imgs.mongabay.com/wp-content/uploads/sites/20/2026/04/14102130/IMG_0208-350x233.jpgimgs.mongabay.com/wp-content/upload... https://imgs.mongabay.com/wp-content/uploads/sites/20/2026/04/14102130/IMG_0208-350x233.jpg — 200 — 8.2 KiB — 91 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
100% of JavaScript execution is third-party
First-party Third-party 1246ms · 520KB · $17/mo
news.mongabay.com
Other
Costly
Execution 321ms
Transfer 38 KB
Monthly Cost $4/mo
Unattributable
Other
Costly
Execution 274ms
Transfer 0 KB
Monthly Cost $4/mo
HubSpot Analytics
Analytics
Optional
Execution 174ms
Transfer 42 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 77ms
Transfer 155 KB
Unused 41%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 77ms
Transfer 159 KB
Unused 42%
Monthly Cost $1/mo
news.mongabay.com
Other
Optional
Execution 71ms
Transfer 0 KB
Monthly Cost $1/mo
cdn.onesignal.com
Other
Optional
Execution 71ms
Transfer 69 KB
Unused 64%
Monthly Cost $1/mo
Microsoft Clarity
Session Replay
Optional
Execution 67ms
Transfer 26 KB
Monthly Cost $1/mo
news.mongabay.com
Other
Optional
Execution 59ms
Transfer 31 KB
Monthly Cost $1/mo
news.mongabay.com
Other
Optional
Execution 55ms
Transfer 1 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • news.mongabay.com adds 321ms and costs ~$4/month
  • Unattributable adds 274ms 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

news.mongabay.com takes 321ms 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 274ms 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

64% of cdn.onesignal.com'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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