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https://podomatic.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
0
REVIEW
4
PASS
9
INFO
2

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

Mobile Desktop
97
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.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

835 ms

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

1.22 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.

0.014

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

835 ms

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

1.22 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
9 PASS 4 REVIEW
B
Page Weight Budget
1.1 MB transferred, 37 requests
REVIEW
1.1 MB transferred, 37 requests
Info::
Page weighs 2.0 MB (1.1 MB transferred)
Info::
Fonts are 239 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 239 KB
Info::
37 HTTP requests
Info::
Estimated 0.23 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
37 requests
0.23 g CO2 per page load
Images 574.1 KiB 50%
JavaScript 266.3 KiB 23%
Fonts 239.1 KiB 21%
CSS 42.3 KiB 4%
HTML 16.6 KiB 1%
Other 5.5 KiB 0%
Other 589 B 0%
Other 20 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

C
Image Optimization
Action
23 images, 0 KB saveable
REVIEW
23 images, 0 KB saveable
Warning::
https://podomatic.com/assets/splash/icon-facebook-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/step2-c1e6703d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/podomatic-logo-large-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/youtube/yt_icon_red_d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/step1-197f4ccf... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/step4-3e97bc31... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/icon-itunes-27... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/recording_apps... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/icon-twitter-6... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/youtube/apple_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/youtube/amazon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/icon-googlepla... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/listening_apps... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/iab_white-29c2bb170bf... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/create/podomat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/youtube/spotif... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/youtube/deezer... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/youtube/pfm-56... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/step3-6f22496e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/stats-661308a3... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://podomatic.com/assets/splash/promotion-09eb... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
23 images 574 KB
0 oversized -0 KB
11 legacy format
21 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Bundles
5 scripts, 120 KB unused
REVIEW
5 scripts, 120 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-DXJJ...: 64 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://podomatic.com/assets/splash-11fcf72bd8a4a2...: 57 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 120 KB
120 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-DXJJ858SDJ160 KB64 KB (40%)✓3rd
https://podomatic.com/assets/splash-11fcf72bd8a4a221d4cbffe79a2ddabe263526b9777c9ee527e3a19a2c08bfaf.js75 KB57 KB (76%)✓1st
https://podomatic.com/assets/beacons-c4e042abf9c960928e46f2701efb5a4f57fbc4f622abaf7a1b762cf6d6b22244.js1 KB—✓1st
https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312451611 KB—✓3rd
https://www.google-analytics.com/analytics.js21 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

B
HTTP Caching
max-age=0, private, must-revalidate
REVIEW
max-age=0, private, must-revalidate
Info::
Cache-Control header is set
Got: max-age=0, private, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0, private, must-revalidate

DirectiveValueMeaning
max-age0Cache for 0 seconds
private—Only browser cache, not CDN/proxy
must-revalidate—Must recheck with server after expiry
A+
Third-Party Impact
20% third-party, 0 ms blocking
PASS
20% third-party, 0 ms blocking
Info::
Third-party code accounts for 20% of page weight (228.8 KiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
80%
20%
First-party Third-party
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
263ms total JS execution
PASS
263ms total JS execution
Info::
https://podomatic.com/: 105ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-DXJJ...: 81ms CPU time
Info::
Unattributable: 77ms CPU time
Warning::
Third-party scripts: 158ms (60% of total)

Main Thread Breakdown

Script Evaluation 34% Style & Layout 28% Other 25% Script Parsing & Compilation 8% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://podomatic.com/105ms3ms1ms1st
https://www.googletagmanager.com/gtag/js?id=G-DXJJ858SDJ81ms66ms15ms3rd
Unattributable77ms3ms0ms3rd
A+
Font Loading
2 fonts (239 KB)
PASS
2 fonts (239 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

239 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 835 ms LCP 1.2 shttps://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2rP2Yp2ywxg089UriI5-g4vl... https://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2 — 36.1 KiB — 9 ms — font-display: swaphttps://podomatic.com/assets/NunitoSans-VariableFont-4eddcfaf7ce8dfe397ba6572a07296ec39e0934ed53f17c59e7911741386b94e.woff2NunitoSans-VariableFont... https://podomatic.com/assets/NunitoSans-VariableFont-4eddcfaf7ce8dfe397ba6572a07296ec39e0934ed53f17c59e7911741386b94e.woff2 — 202.9 KiB — 24 ms — font-display: swap
rP2Yp2ywxg089UriI5-g4vl... woff2 swap
Size 36 KB
Load time 9 ms
Start 575 ms
Risk FOUT — text flashes from fallback to web font
NunitoSans-VariableFont... woff2 swap
Size 203 KB
Load time 24 ms
Start 575 ms
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
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 ~101 KB and ~202 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
Page Weight Inventory
37 resources · 1.1 MB · 120 KB savings available
PASS
37 resources · 1.1 MB · 120 KB savings available
Warning::
Page weight 121 KB over 1MB target
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~120 KB of savings available
Info::
7 third-party resources (20% of weight)
Info::
2 resources over 200KB
37 resources · 1.1 MiB · 7 third-party 120.5 KiB over 1MB target
Image 51% · 579.7 KiB
JavaScript 23% · 266.3 KiB
Font 21% · 239.1 KiB
CSS 4% · 42.3 KiB
Document 1% · 16.6 KiB
Other 0% · 609 B

~120.4 KiB of savings available

Remove unused JavaScript: 120.4 KiB
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
37 requests over 776ms
INFO
0 ms 500 ms 1.0 s FCP 835 ms LCP 1.2 shttps://podomatic.com// https://podomatic.com/ — 200 — 16.6 KiB — 396 ms — h2https://podomatic.com/assets/beacons-c4e042abf9c960928e46f2701efb5a4f57fbc4f622abaf7a1b762cf6d6b22244.js/assets/beacons-c4e042abf9c960928e4... https://podomatic.com/assets/beacons-c4e042abf9c960928e46f2701efb5a4f57fbc4f622abaf7a1b762cf6d6b22244.js — 200 — 601 B — 12 ms — h2https://podomatic.com/assets/splash-641fff43aa392f3b58c528b1bfe847994c7ca14bc250882091b1b4499b5d2f42.css/assets/splash-641fff43aa392f3b58c5... https://podomatic.com/assets/splash-641fff43aa392f3b58c528b1bfe847994c7ca14bc250882091b1b4499b5d2f42.css — 200 — 41.4 KiB — 24 ms — h2https://podomatic.com/assets/splash-11fcf72bd8a4a221d4cbffe79a2ddabe263526b9777c9ee527e3a19a2c08bfaf.js/assets/splash-11fcf72bd8a4a221d4cb... https://podomatic.com/assets/splash-11fcf72bd8a4a221d4cbffe79a2ddabe263526b9777c9ee527e3a19a2c08bfaf.js — 200 — 74.6 KiB — 30 ms — h2https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,400;0,500;0,700;1,400;1,500;1,700&display=swapfonts.googleapis.com/css2?family=DM... https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,400;0,500;0,700;1,400;1,500;1,700&display=swap — 200 — 997 B — 48 ms — h2https://podomatic.com/assets/podomatic-logo-large-88d94a4b469308b8e98631df6d0494040a8d36e01edc442550d5bebbc2e1539a.svg/assets/podomatic-logo-large-88d94a... https://podomatic.com/assets/podomatic-logo-large-88d94a4b469308b8e98631df6d0494040a8d36e01edc442550d5bebbc2e1539a.svg — 200 — 1.4 KiB — 26 ms — h2https://podomatic.com/assets/splash/create/podomatic-dashboard-a0986302545e0610b464f4cd1049347ab42e5231083e2cb950cb535e3cd4a466.png/assets/splash/create/podomatic-das... https://podomatic.com/assets/splash/create/podomatic-dashboard-a0986302545e0610b464f4cd1049347ab42e5231083e2cb950cb535e3cd4a466.png — 200 — 340.4 KiB — 32 ms — h2https://podomatic.com/assets/splash/youtube/apple_podcast-9becaa76de402a7e80283e67b7f6370129440f8936dbbd22233877e4908bd9b7.svg/assets/splash/youtube/apple_podcas... https://podomatic.com/assets/splash/youtube/apple_podcast-9becaa76de402a7e80283e67b7f6370129440f8936dbbd22233877e4908bd9b7.svg — 200 — 1.5 KiB — 15 ms — h2https://podomatic.com/assets/splash/youtube/spotify-37b087bbcb27121a319d0d4a5923e158e7e437212361dee35b01bee470ec5700.svg/assets/splash/youtube/spotify-37b0... https://podomatic.com/assets/splash/youtube/spotify-37b087bbcb27121a319d0d4a5923e158e7e437212361dee35b01bee470ec5700.svg — 200 — 660 B — 14 ms — h2https://podomatic.com/assets/youtube/yt_icon_red_digital_cropped-20263cf7857a12dfcced1a494db83559e2cefdb7b80079dcec0980d6033967af.png/assets/youtube/yt_icon_red_digital... https://podomatic.com/assets/youtube/yt_icon_red_digital_cropped-20263cf7857a12dfcced1a494db83559e2cefdb7b80079dcec0980d6033967af.png — 200 — 12.6 KiB — 12 ms — h2https://podomatic.com/assets/splash/youtube/amazon_music_logo-d753799d05dc06e5a6e6edb46c33b2065ede171568d1382fc86eb45157331aa6.svg/assets/splash/youtube/amazon_music... https://podomatic.com/assets/splash/youtube/amazon_music_logo-d753799d05dc06e5a6e6edb46c33b2065ede171568d1382fc86eb45157331aa6.svg — 200 — 11.1 KiB — 22 ms — h2https://podomatic.com/assets/splash/youtube/deezer_logo-7c44cef3f0286ea5ddf6402352c773ed94c8b958d74e4f0aef5ef4c860eee1a1.svg/assets/splash/youtube/deezer_logo-... https://podomatic.com/assets/splash/youtube/deezer_logo-7c44cef3f0286ea5ddf6402352c773ed94c8b958d74e4f0aef5ef4c860eee1a1.svg — 200 — 628 B — 26 ms — h2https://podomatic.com/assets/splash/youtube/pfm-56476ac6179c8a1ed23a3fa4c424858f249832ffa0cf5197e84181312037575f.svg/assets/splash/youtube/pfm-56476ac6... https://podomatic.com/assets/splash/youtube/pfm-56476ac6179c8a1ed23a3fa4c424858f249832ffa0cf5197e84181312037575f.svg — 200 — 76.9 KiB — 55 ms — h2https://podomatic.com/assets/splash/step1-197f4ccf957697eff0bdc260351ba5227e27751c720c981603b6fe56005793d8.webp/assets/splash/step1-197f4ccf957697... https://podomatic.com/assets/splash/step1-197f4ccf957697eff0bdc260351ba5227e27751c720c981603b6fe56005793d8.webp — 200 — 1.2 KiB — 27 ms — h2https://podomatic.com/assets/splash/step2-c1e6703dfcc80b72cca0cc4f54d805e6560fccde329a13be6857417067845bf7.webp/assets/splash/step2-c1e6703dfcc80b... https://podomatic.com/assets/splash/step2-c1e6703dfcc80b72cca0cc4f54d805e6560fccde329a13be6857417067845bf7.webp — 200 — 1.6 KiB — 30 ms — h2https://podomatic.com/assets/splash/step3-6f22496ebaa33ebc3a4a926e24d56f13f89664dc11a65e3494cdb44aaeabfe0e.webp/assets/splash/step3-6f22496ebaa33e... https://podomatic.com/assets/splash/step3-6f22496ebaa33ebc3a4a926e24d56f13f89664dc11a65e3494cdb44aaeabfe0e.webp — 200 — 2.0 KiB — 32 ms — h2https://podomatic.com/assets/splash/step4-3e97bc312b0d872dbf07479cc206ffaa8addcd13a5ea2d5d15cff0a6b6c7074b.webp/assets/splash/step4-3e97bc312b0d87... https://podomatic.com/assets/splash/step4-3e97bc312b0d872dbf07479cc206ffaa8addcd13a5ea2d5d15cff0a6b6c7074b.webp — 200 — 3.1 KiB — 24 ms — h2https://podomatic.com/assets/splash/icon-itunes-277cbbfc579471ffa0141135ca50db29cb5f55bda4647a3487ba9176920af0f8.webp/assets/splash/icon-itunes-277cbbfc... https://podomatic.com/assets/splash/icon-itunes-277cbbfc579471ffa0141135ca50db29cb5f55bda4647a3487ba9176920af0f8.webp — 200 — 2.0 KiB — 27 ms — h2https://podomatic.com/assets/splash/icon-googleplay-0a434615cd3a16c7c73b5f60527c04a61ca866cfd1a33fc5540da92a5e41a842.webp/assets/splash/icon-googleplay-0a43... https://podomatic.com/assets/splash/icon-googleplay-0a434615cd3a16c7c73b5f60527c04a61ca866cfd1a33fc5540da92a5e41a842.webp — 200 — 1.8 KiB — 30 ms — h2https://podomatic.com/assets/splash/recording_apps-efc75302de3ee592ad4bb89f1eb090f8324ee6c2bf64044811f1a7627ba944c0.webp/assets/splash/recording_apps-efc75... https://podomatic.com/assets/splash/recording_apps-efc75302de3ee592ad4bb89f1eb090f8324ee6c2bf64044811f1a7627ba944c0.webp — 200 — 14.8 KiB — 33 ms — h2https://podomatic.com/assets/splash/listening_apps-03449eca37e09e4e77446ca41358200c99088f241f5adf252aa5f89d6f6f035a.webp/assets/splash/listening_apps-03449... https://podomatic.com/assets/splash/listening_apps-03449eca37e09e4e77446ca41358200c99088f241f5adf252aa5f89d6f6f035a.webp — 200 — 35.0 KiB — 51 ms — h2https://podomatic.com/assets/splash/stats-661308a3c2dbd1883c1702e11ff21e0ee5ea0672555e24c58ba1cc5e43e9416f.webp/assets/splash/stats-661308a3c2dbd1... https://podomatic.com/assets/splash/stats-661308a3c2dbd1883c1702e11ff21e0ee5ea0672555e24c58ba1cc5e43e9416f.webp — 200 — 21.8 KiB — 47 ms — 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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
60% of JavaScript execution is third-party
First-party Third-party 158ms · 160KB · $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 81ms
Transfer 160 KB
Unused 40%
Monthly Cost $1/mo
Unattributable
Other
Optional
Execution 77ms
Transfer 0 KB
Monthly Cost $1/mo

60% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

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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