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https://Pennycalc.com

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
1
REVIEW
7
PASS
15
INFO
2

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

Mobile Desktop
96
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.
100
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.

962 ms

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

1.63 s

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

212 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.

1.39 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.

5.70 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
25
15 PASS 7 REVIEW 1 FIX
D
Third-Party Impact
Action
93% third-party, 0 ms blocking
FIX
93% third-party, 0 ms blocking
Warning::
Third-party code accounts for 93% of page weight (494.3 KiB of 529.7 KiB)
Info::
Third-party blocking time is low (0 ms)
93%
First-party Third-party
C
JS Execution Cost
Action
1040ms total JS execution
REVIEW
1040ms total JS execution
Warning::
https://pennycalc.com/: 256ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-8DBK...: 214ms CPU time
Info::
https://fundingchoicesmessages.google.com/i/ca-pub...: 158ms CPU time
Info::
https://pagead2.googlesyndication.com/pagead/manag...: 138ms CPU time
Info::
Unattributable: 124ms CPU time
Warning::
Third-party scripts: 785ms (75% of total)

Main Thread Breakdown

Script Evaluation 54% Other 19% Style & Layout 10% Script Parsing & Compilation 10% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://pennycalc.com/256ms16ms3ms1st
https://www.googletagmanager.com/gtag/js?id=G-8DBKHCRCKZ214ms180ms31ms3rd
https://fundingchoicesmessages.google.com/i/ca-pub-7877367868278158?href=https%3A%2F%2Fpennycalc.com&ers=2158ms141ms14ms3rd
https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202605050101/show_ads_impl_fy2021.js?bust=31098321138ms96ms39ms3rd
Unattributable124ms10ms0ms3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-787736786827815888ms74ms14ms3rd
https://pagead2.googlesyndication.com/pagead/js/r20260506/r20190131/rum_fy2021.js62ms40ms5ms3rd
C
JS Bundles
Action
8 scripts, 278 KB unused
REVIEW
8 scripts, 278 KB unused
Warning::
https://pagead2.googlesyndication.com/pagead/manag...: 148 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-8DBK...: 66 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fundingchoicesmessages.google.com/i/ca-pub...: 36 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://pagead2.googlesyndication.com/pagead/js/ad...: 29 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 278 KB
278 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202605050101/show_ads_impl_fy2021.js?bust=31098321177 KB148 KB (83%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-8DBKHCRCKZ158 KB66 KB (42%)✓3rd
https://fundingchoicesmessages.google.com/i/ca-pub-7877367868278158?href=https%3A%2F%2Fpennycalc.com&ers=270 KB36 KB (53%)✓3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-787736786827815854 KB29 KB (53%)✓3rd
https://pennycalc.com/scripts/tween-numbers.js2 KB—✓1st
https://static.cloudflareinsights.com/beacon.min.js11 KB—✓3rd
https://pagead2.googlesyndication.com/pagead/js/r20260506/r20190131/rum_fy2021.js21 KB—✓3rd
https://fundingchoicesmessages.google.com/f/AGSKWxWymqovQku4l2na7rjMPUot61_O8oDrYK_68Q1FAiF9d4LfLQX1pEiGlSZ3nB81uO0Fd1_evckAJOr0NY-x9CoAljqsdQU4idG2JXwb2QNFquxRGQyvVGAsDefbFjHD6eglm1Zc-A==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc4NDEyNjg1LDk1MzAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly9wZW5ueWNhbGMuY29tLyIsbnVsbCxbWzgsIlJpYXFiblNJNWVjIl0sWzksImVuLVVTIl0sWzE4LCJbW1tudWxsLDUyOV1dXSJdLFszNSwiMTc3ODQxMjY4NSJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjUsIltbMzEwNjE2OTEsMzEwNjE2OTNdXSJdLFsyOSwidHJ1ZSJdXV02 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

C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
B
Page Weight Inventory
20 resources · 530 KB · 278 KB savings available
REVIEW
20 resources · 530 KB · 278 KB savings available
Info::
Within 1MB page-weight target
Got: 530 KB
Info::
~278 KB of savings available
Warning::
15 third-party resources (93% of weight)
20 resources · 529.7 KiB · 15 third-party Within 1MB page-weight target
JavaScript 93% · 495.1 KiB
CSS 4% · 21.0 KiB
Document 2% · 11.9 KiB
Image 0% · 1.1 KiB
Other 0% · 582 B

~278.1 KiB of savings available

Remove unused JavaScript: 278.1 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A+
Page Weight Budget
530 KB transferred, 20 requests
PASS
530 KB transferred, 20 requests
Info::
Page weighs 1.7 MB (530 KB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.11 g CO2 per page load
530 KB / 2.4 MB budget
530 KB transferred
20 requests
0.11 g CO2 per page load
JavaScript 495.1 KiB 93%
CSS 21.0 KiB 4%
HTML 11.8 KiB 2%
Other 754 B 0%
Other 547 B 0%
Other 371 B 0%
Other 147 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
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+
Image Optimization
No images on this page
PASS
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, must-revalidate
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: accept-encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
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
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
1 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Network Waterfall
20 requests over 2991ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 962 ms LCP 1.6 shttps://pennycalc.com// https://pennycalc.com/ — 200 — 11.8 KiB — 107 ms — h2https://www.googletagmanager.com/gtag/js?id=G-8DBKHCRCKZwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-8DBKHCRCKZ — 200 — 158.0 KiB — 278 ms — h2https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-7877367868278158pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-7877367868278158 — 200 — 54.0 KiB — 203 ms — h3https://pennycalc.com/_astro/index.DcT4rkL-.css/_astro/index.DcT4rkL-.css https://pennycalc.com/_astro/index.DcT4rkL-.css — 200 — 9.1 KiB — 68 ms — h2https://pennycalc.com/_astro/index.CiX8D4Wu.css/_astro/index.CiX8D4Wu.css https://pennycalc.com/_astro/index.CiX8D4Wu.css — 200 — 11.9 KiB — 77 ms — h2https://pennycalc.com/scripts/tween-numbers.js/scripts/tween-numbers.js https://pennycalc.com/scripts/tween-numbers.js — 200 — 1.9 KiB — 52 ms — h2https://static.cloudflareinsights.com/beacon.min.jsstatic.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js — 200 — 11.4 KiB — 96 ms — h2https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202605050101/show_ads_impl_fy2021.js?bust=31098321pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202605050101/show_ads_impl_fy2021.js?bust=31098321 — 200 — 177.1 KiB — 146 ms — h3https://region1.google-analytics.com/g/collect?v=2&tid=G-8DBKHCRCKZ&gtm=45je6562v9245692971za200zd9245692971&_p=1778412685326&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=1093269080.1778412686&frm=0&pscdl=noapi&rcb=12&sr=412x823&uaa=&uab=64&uafvl=Not%252FA)Brand%3B99.0.0.0%7CChromium%3B148.0.7778.96&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938465~115938468~118463261&sid=1778412685&sct=1&seg=0&dl=https%3A%2F%2Fpennycalc.com%2F&dt=PennyCalc%20%E2%80%94%20Financial%20Calculators%20That%20Show%20the%20Math&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=456region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-8DBKHCRCKZ&gtm=45je6562v9245692971za200zd9245692971&_p=1778412685326&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=1093269080.1778412686&frm=0&pscdl=noapi&rcb=12&sr=412x823&uaa=&uab=64&uafvl=Not%252FA)Brand%3B99.0.0.0%7CChromium%3B148.0.7778.96&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938465~115938468~118463261&sid=1778412685&sct=1&seg=0&dl=https%3A%2F%2Fpennycalc.com%2F&dt=PennyCalc%20%E2%80%94%20Financial%20Calculators%20That%20Show%20the%20Math&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=456 — 204 — 547 B — 90 ms — h2https://fundingchoicesmessages.google.com/i/ca-pub-7877367868278158?href=https%3A%2F%2Fpennycalc.com&ers=2fundingchoicesmessages.google.com/i... https://fundingchoicesmessages.google.com/i/ca-pub-7877367868278158?href=https%3A%2F%2Fpennycalc.com&ers=2 — 200 — 70.2 KiB — 252 ms — h2https://pagead2.googlesyndication.com/pagead/js/r20260506/r20190131/rum_fy2021.jspagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/js/r20260506/r20190131/rum_fy2021.js — 200 — 20.9 KiB — 36 ms — h3https://fundingchoicesmessages.google.com/el/AGSKWxVUbPcPobVCZy5m48vNTvkNvAiBIUGtpNQ9pL4ogt0Pk-_caK0OZ20RzlrflYXf4reGPqsjnIRb14Ye7FHeVo3zHQypYdewQ3uXd_48Y-Vr0qkwhJpt8JKPUIyX1uYpzfPnuuv1Aw==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxVUbPcPobVCZy5m48vNTvkNvAiBIUGtpNQ9pL4ogt0Pk-_caK0OZ20RzlrflYXf4reGPqsjnIRb14Ye7FHeVo3zHQypYdewQ3uXd_48Y-Vr0qkwhJpt8JKPUIyX1uYpzfPnuuv1Aw== — 204 — 28 B — 137 ms — h3https://fundingchoicesmessages.google.com/el/AGSKWxVUbPcPobVCZy5m48vNTvkNvAiBIUGtpNQ9pL4ogt0Pk-_caK0OZ20RzlrflYXf4reGPqsjnIRb14Ye7FHeVo3zHQypYdewQ3uXd_48Y-Vr0qkwhJpt8JKPUIyX1uYpzfPnuuv1Aw==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxVUbPcPobVCZy5m48vNTvkNvAiBIUGtpNQ9pL4ogt0Pk-_caK0OZ20RzlrflYXf4reGPqsjnIRb14Ye7FHeVo3zHQypYdewQ3uXd_48Y-Vr0qkwhJpt8JKPUIyX1uYpzfPnuuv1Aw== — 204 — 28 B — 135 ms — h3https://fundingchoicesmessages.google.com/el/AGSKWxVUbPcPobVCZy5m48vNTvkNvAiBIUGtpNQ9pL4ogt0Pk-_caK0OZ20RzlrflYXf4reGPqsjnIRb14Ye7FHeVo3zHQypYdewQ3uXd_48Y-Vr0qkwhJpt8JKPUIyX1uYpzfPnuuv1Aw==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxVUbPcPobVCZy5m48vNTvkNvAiBIUGtpNQ9pL4ogt0Pk-_caK0OZ20RzlrflYXf4reGPqsjnIRb14Ye7FHeVo3zHQypYdewQ3uXd_48Y-Vr0qkwhJpt8JKPUIyX1uYpzfPnuuv1Aw== — 204 — 28 B — 128 ms — 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https://fundingchoicesmessages.google.com/f/AGSKWxWymqovQku4l2na7rjMPUot61_O8oDrYK_68Q1FAiF9d4LfLQX1pEiGlSZ3nB81uO0Fd1_evckAJOr0NY-x9CoAljqsdQU4idG2JXwb2QNFquxRGQyvVGAsDefbFjHD6eglm1Zc-A==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc4NDEyNjg1LDk1MzAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly9wZW5ueWNhbGMuY29tLyIsbnVsbCxbWzgsIlJpYXFiblNJNWVjIl0sWzksImVuLVVTIl0sWzE4LCJbW1tudWxsLDUyOV1dXSJdLFszNSwiMTc3ODQxMjY4NSJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjUsIltbMzEwNjE2OTEsMzEwNjE2OTNdXSJdLFsyOSwidHJ1ZSJdXV0 — 200 — 1.8 KiB — 93 ms — h2https://fundingchoicesmessages.google.com/el/AGSKWxVUbPcPobVCZy5m48vNTvkNvAiBIUGtpNQ9pL4ogt0Pk-_caK0OZ20RzlrflYXf4reGPqsjnIRb14Ye7FHeVo3zHQypYdewQ3uXd_48Y-Vr0qkwhJpt8JKPUIyX1uYpzfPnuuv1Aw==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxVUbPcPobVCZy5m48vNTvkNvAiBIUGtpNQ9pL4ogt0Pk-_caK0OZ20RzlrflYXf4reGPqsjnIRb14Ye7FHeVo3zHQypYdewQ3uXd_48Y-Vr0qkwhJpt8JKPUIyX1uYpzfPnuuv1Aw== — 204 — 28 B — 56 ms — h3https://cloudflareinsights.com/cdn-cgi/rumcloudflareinsights.com/cdn-cgi/rum https://cloudflareinsights.com/cdn-cgi/rum — 200 — 0 B — 87 ms — h2https://pennycalc.com/favicon.svg/favicon.svg https://pennycalc.com/favicon.svg — 200 — 754 B — 54 ms — h3https://cloudflareinsights.com/cdn-cgi/rumcloudflareinsights.com/cdn-cgi/rum https://cloudflareinsights.com/cdn-cgi/rum — 204 — 35 B — 21 ms — h2https://csi.gstatic.com/csi?v=2&s=pagead&action=csi_pagead&dmc=8&top=1&puid=1~mozozukm&c=1888113671270367&e=95387509%2C31098321%2C95390680%2C31061691%2C31061693&ctx=1&met.3=1001.9n_1__1~112.fz_2~113.pu_1&met.7=CBsQCMAB2b34dA~CBsQChgBIHYodjCMAziWAsABjNXY6wQ~CAEQChgBIHYodjDDAjjNAUB4SIwBUIwBWNABYIwBaNABcJICePixA4ABzK8DiAHk4QmwAQG4AQPAAd6Ov5sB~CBsQCiB3ODbAAZSGpskJ~CBsQByB3OEXAAYOL8Z8B~CBsQByB3OE_AAZ3X_LoK~CBsQCiB3OGPAAfq-sY4C~CAMQChgBINsCKNsCMO0DOJIBUNsCWJADYNwCaNwCcJMDeMOKC4ABl4gLiAHllyKwAQG4AQPAAaaDwPkM~CBwQChgBIJUEKJUEMLoEOCVolQRwuAR4-KgBgAHMpgGIAcqsA7ABAbgBA8AB1t_8Qg~CD8QChgBIJMEKJMEMI8GOP0BQJMESK0EUK0EWIcFYM8EaIcFcM0FeNCoBIABpKYEiAGrzQ2wAQG4AQPAAa7r0eQB~CD8QChgBILsGKLsGMJgHOF1ovAZwlwd48QyAAcUKiAHpFLABAbgBA8ABhp7grg8~CBsQCDieB8AB2b34dA~CD8QDRgBIKIGKKIGMKwHOIoBwAHNz7ekAQ~CD8QDRgBIKUGKKUGMKwHOIgBwAHNz7ekAQ~CD8QDRgBIK0GKK0GMK0HOIABwAHNz7ekAQ~CD8QDRgBIJ0HKJ0HMNYHODnAAc3Pt6QB~CBsgowc4NsABkYWgrw0~CBsQDSChBzhtwAGslt27Ag&met.1=1.mozozu4n~6.1~7.2~8.6~9.6~10.19~11.m~12.1a~13.2z~14.31~15.34~16.3h~17.6f~18.6f~19.pp~20.pp~21.pq~22.6s~23.6scsi.gstatic.com/csi?v=2&s=pagead&ac... https://csi.gstatic.com/csi?v=2&s=pagead&action=csi_pagead&dmc=8&top=1&puid=1~mozozukm&c=1888113671270367&e=95387509%2C31098321%2C95390680%2C31061691%2C31061693&ctx=1&met.3=1001.9n_1__1~112.fz_2~113.pu_1&met.7=CBsQCMAB2b34dA~CBsQChgBIHYodjCMAziWAsABjNXY6wQ~CAEQChgBIHYodjDDAjjNAUB4SIwBUIwBWNABYIwBaNABcJICePixA4ABzK8DiAHk4QmwAQG4AQPAAd6Ov5sB~CBsQCiB3ODbAAZSGpskJ~CBsQByB3OEXAAYOL8Z8B~CBsQByB3OE_AAZ3X_LoK~CBsQCiB3OGPAAfq-sY4C~CAMQChgBINsCKNsCMO0DOJIBUNsCWJADYNwCaNwCcJMDeMOKC4ABl4gLiAHllyKwAQG4AQPAAaaDwPkM~CBwQChgBIJUEKJUEMLoEOCVolQRwuAR4-KgBgAHMpgGIAcqsA7ABAbgBA8AB1t_8Qg~CD8QChgBIJMEKJMEMI8GOP0BQJMESK0EUK0EWIcFYM8EaIcFcM0FeNCoBIABpKYEiAGrzQ2wAQG4AQPAAa7r0eQB~CD8QChgBILsGKLsGMJgHOF1ovAZwlwd48QyAAcUKiAHpFLABAbgBA8ABhp7grg8~CBsQCDieB8AB2b34dA~CD8QDRgBIKIGKKIGMKwHOIoBwAHNz7ekAQ~CD8QDRgBIKUGKKUGMKwHOIgBwAHNz7ekAQ~CD8QDRgBIK0GKK0GMK0HOIABwAHNz7ekAQ~CD8QDRgBIJ0HKJ0HMNYHODnAAc3Pt6QB~CBsgowc4NsABkYWgrw0~CBsQDSChBzhtwAGslt27Ag&met.1=1.mozozu4n~6.1~7.2~8.6~9.6~10.19~11.m~12.1a~13.2z~14.31~15.34~16.3h~17.6f~18.6f~19.pp~20.pp~21.pq~22.6s~23.6s — 204 — 371 B — 964 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
75% of JavaScript execution is third-party
First-party Third-party 785ms · 480KB · €13/mo
Google Tag Manager
Tag Manager
Costly
Execution 214ms
Transfer 158 KB
Unused 42%
Monthly Cost €3/mo
fundingchoicesmessages.google.com
Other
Optional
Execution 158ms
Transfer 70 KB
Unused 53%
Monthly Cost €3/mo
pagead2.googlesyndication.com
Other
Optional
Execution 138ms
Transfer 177 KB
Unused 83%
Monthly Cost €2/mo
Unattributable
Other
Optional
Execution 124ms
Transfer 0 KB
Monthly Cost €2/mo
pagead2.googlesyndication.com
Other
Optional
Execution 88ms
Transfer 54 KB
Unused 53%
Monthly Cost €1/mo
pagead2.googlesyndication.com
Other
Optional
Execution 62ms
Transfer 21 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 214ms and costs ~€3/month

75% 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

Google Tag Manager takes 214ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

53% of fundingchoicesmessages.google.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

83% of pagead2.googlesyndication.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

53% of pagead2.googlesyndication.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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