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https://psychologytoday.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
4
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
79
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
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.
92
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.

1.86 s

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

2.28 s

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

45 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.

1.86 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.

2.46 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
7 PASS 2 REVIEW 4 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 (1.7 MiB of 1.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
16 scripts, 434 KB unused
FIX
16 scripts, 434 KB unused
Warning::
https://directory-resources.psychologytoday.com/pt...: 207 KB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-5EMH...: 66 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WGT...: 59 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://directory-resources.psychologytoday.com/pt...: 52 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://directory-resources.psychologytoday.com/pt...: 31 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 434 KB
434 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/DetailsOverlay.js230 KB207 KB (90%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-5EMHF6S1M6&cx=c&gtm=4e64h1h1165 KB66 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WGTKPG136 KB59 KB (43%)✓3rd
https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/icons.js74 KB52 KB (70%)✓3rd
https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/entry.js91 KB31 KB (34%)✓3rd
https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/AppView.js34 KB20 KB (60%)✓3rd
https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/parseCredentials.js6 KB—✓3rd
https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/ResultsRow.js36 KB—✓3rd
https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/Copy.js1 KB—✓3rd
https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/GeneralIndex.vue.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

F
Page Weight Inventory
Action
49 resources · 1.7 MB · 434 KB savings available
FIX
49 resources · 1.7 MB · 434 KB savings available
Warning::
Page weight 672 KB over 1MB target
Got: 1.7 MB Expected: ≤ 1 MB
Info::
~434 KB of savings available
Warning::
48 third-party resources (100% of weight)
Info::
2 resources over 200KB
49 resources · 1.7 MiB · 48 third-party 671.6 KiB over 1MB target
JavaScript 50% · 854.6 KiB
Image 26% · 444.2 KiB
Font 15% · 257.4 KiB
Document 4% · 68.1 KiB
CSS 3% · 56.1 KiB
Other 1% · 15.3 KiB

~434.4 KiB of savings available

Remove unused JavaScript: 434.4 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Page Weight Budget
Action
1.7 MB transferred, 49 requests
REVIEW
1.7 MB transferred, 49 requests
Info::
Page weighs 4.1 MB (1.7 MB transferred)
Warning::
JavaScript is 855 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 855 KB
Info::
Fonts are 257 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 257 KB
Info::
49 HTTP requests
Info::
Estimated 0.35 g CO2 per page load
1.7 MB / 2.4 MB budget
1.7 MB transferred
49 requests
0.35 g CO2 per page load
JavaScript 854.6 KiB 50%
Images 443.0 KiB 26%
Fonts 257.4 KiB 15%
HTML 67.9 KiB 4%
CSS 56.1 KiB 3%
Other 14.1 KiB 1%
Other 1.5 KiB 0%
Other 895 B 0%
Other 260 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

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
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
Image Optimization
8 images, 0 KB saveable
PASS
8 images, 0 KB saveable
Info::
All images are well-optimized
8 images 443 KB
0 oversized -0 KB
2 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
407ms total JS execution
PASS
407ms total JS execution
Info::
Unattributable: 181ms CPU time
Info::
https://www.psychologytoday.com/fr/psychologues: 118ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-5EMH...: 54ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-WGT...: 54ms CPU time
Warning::
Third-party scripts: 407ms (100% of total)

Main Thread Breakdown

Script Evaluation 49% Other 25% Style & Layout 15% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
Unattributable181ms75ms0ms3rd
https://www.psychologytoday.com/fr/psychologues118ms20ms1ms3rd
https://www.googletagmanager.com/gtag/js?id=G-5EMHF6S1M6&cx=c&gtm=4e64h1h154ms44ms10ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WGTKPG54ms45ms8ms3rd
A+
Font Loading
3 fonts (257 KB)
PASS
3 fonts (257 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

257 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.9 s LCP 2.3 shttps://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/proxima-nova-regular.woff2proxima-nova-regular.woff2 https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/proxima-nova-regular.woff2 — 85.2 KiB — 13 ms — font-display: swaphttps://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/proxima-nova-semibold.woff2proxima-nova-semibold.w... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/proxima-nova-semibold.woff2 — 85.5 KiB — 14 ms — font-display: swaphttps://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/proxima-nova-bold.woff2proxima-nova-bold.woff2 https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/proxima-nova-bold.woff2 — 86.7 KiB — 5 ms — font-display: swap
proxima-nova-regular.woff2 woff2 swap
Size 85 KB
Load time 13 ms
Start 689 ms
Risk FOUT — text flashes from fallback to web font
proxima-nova-semibold.w... woff2 swap
Size 86 KB
Load time 14 ms
Start 689 ms
Risk FOUT — text flashes from fallback to web font
proxima-nova-bold.woff2 woff2 swap
Size 87 KB
Load time 5 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
49 requests over 1930ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.9 s LCP 2.3 shttps://psychologytoday.com// https://psychologytoday.com/ — 301 — 91 B — 291 ms — h2https://www.psychologytoday.com/www.psychologytoday.com/ https://www.psychologytoday.com/ — 301 — 116 B — 124 ms — h2https://www.psychologytoday.com/fr/psychologueswww.psychologytoday.com/fr/psycholo... https://www.psychologytoday.com/fr/psychologues — 200 — 67.9 KiB — 203 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/entry.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/entry.css — 200 — 3.4 KiB — 18 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/useModal.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/useModal.css — 200 — 2.5 KiB — 18 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/DetailsOverlay.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/DetailsOverlay.css — 200 — 18.4 KiB — 22 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/parseCredentials.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/parseCredentials.css — 200 — 2.1 KiB — 21 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/ResultsRow.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/ResultsRow.css — 200 — 3.4 KiB — 20 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/AppView.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/AppView.css — 200 — 10.9 KiB — 28 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/GeneralIndex.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/GeneralIndex.css — 200 — 1.3 KiB — 25 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/MapViewCta.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/MapViewCta.css — 200 — 5.9 KiB — 24 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/entry.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/entry.js — 200 — 90.9 KiB — 39 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/icons.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/icons.js — 200 — 74.0 KiB — 58 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/app.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/app.js — 200 — 24.2 KiB — 50 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/useModal.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/useModal.js — 200 — 9.6 KiB — 48 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/Copy.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/Copy.js — 200 — 1.1 KiB — 44 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/DetailsOverlay.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/DetailsOverlay.js — 200 — 229.8 KiB — 58 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/parseCredentials.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/parseCredentials.js — 200 — 6.2 KiB — 34 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/ResultsRow.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/ResultsRow.js — 200 — 35.6 KiB — 55 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/AppView.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/AppView.js — 200 — 34.1 KiB — 31 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/GeneralIndex.vue.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/GeneralIndex.vue.js — 200 — 1.1 KiB — 27 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/MapViewCta.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/MapViewCta.js — 200 — 10.8 KiB — 28 ms — h2https://www.datadoghq-browser-agent.com/datadog-logs-v4.jswww.datadoghq-browser-agent.com/dat... https://www.datadoghq-browser-agent.com/datadog-logs-v4.js — 200 — 17.7 KiB — 63 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-WGTKPGwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-WGTKPG — 200 — 136.4 KiB — 138 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/pt.webmanifestdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/pt.webmanifest — 200 — 895 B — 41 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/umbrella-girl.pngdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/umbrella-girl.png — 200 — 442.1 KiB — 39 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='36' …www.w3.org/2000/svg' width='180' he... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='36' … — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='13' height='7' fi…www.w3.org/2000/svg' width='13' hei... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='13' height='7' fi… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='13' f…www.w3.org/2000/svg' width='14' hei... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='13' f… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='8' fi…www.w3.org/2000/svg' width='14' hei... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='8' fi… — 200 — 0 B — 0 ms — data
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.9 s LCP 2.3 shttps://psychologytoday.com// https://psychologytoday.com/ — 301 — 91 B — 291 ms — h2https://www.psychologytoday.com/www.psychologytoday.com/ https://www.psychologytoday.com/ — 301 — 116 B — 124 ms — h2https://www.psychologytoday.com/fr/psychologueswww.psychologytoday.com/fr/psycholo... https://www.psychologytoday.com/fr/psychologues — 200 — 67.9 KiB — 203 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/entry.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/entry.css — 200 — 3.4 KiB — 18 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/useModal.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/useModal.css — 200 — 2.5 KiB — 18 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/DetailsOverlay.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/DetailsOverlay.css — 200 — 18.4 KiB — 22 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/parseCredentials.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/parseCredentials.css — 200 — 2.1 KiB — 21 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/ResultsRow.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/ResultsRow.css — 200 — 3.4 KiB — 20 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/AppView.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/AppView.css — 200 — 10.9 KiB — 28 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/GeneralIndex.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/GeneralIndex.css — 200 — 1.3 KiB — 25 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/MapViewCta.cssdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/MapViewCta.css — 200 — 5.9 KiB — 24 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/entry.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/entry.js — 200 — 90.9 KiB — 39 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/icons.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/icons.js — 200 — 74.0 KiB — 58 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/app.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/app.js — 200 — 24.2 KiB — 50 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/useModal.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/useModal.js — 200 — 9.6 KiB — 48 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/Copy.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/Copy.js — 200 — 1.1 KiB — 44 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/DetailsOverlay.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/DetailsOverlay.js — 200 — 229.8 KiB — 58 ms — h2https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/parseCredentials.jsdirectory-resources.psychologytoday... https://directory-resources.psychologytoday.com/pt/ed7cc747/_nuxt/parseCredentials.js — 200 — 6.2 KiB — 34 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
100% of JavaScript execution is third-party
First-party Third-party 407ms · 370KB · €4/mo
Unattributable
Other
Optional
Execution 181ms
Transfer 0 KB
Monthly Cost €2/mo
www.psychologytoday.com
Other
Optional
Execution 118ms
Transfer 68 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 54ms
Transfer 165 KB
Unused 40%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 54ms
Transfer 136 KB
Unused 43%
Monthly Cost €1/mo

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

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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