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https://uba.ar

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
1
REVIEW
5
PASS
7
INFO
2

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

Mobile Desktop
55
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
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.

16.00 s

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

18.84 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.

0.001

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

25.95 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.

18.84 s

Page Load Progression

5.0 s
10.0 s
15.0 s
20.0 s
25.0 s
30.0 s
34.9 s
39.9 s
Checks
15
7 PASS 5 REVIEW 1 FIX
F
Page Weight Budget
Action
2.9 MB transferred, 32 requests
FIX
2.9 MB transferred, 32 requests
Warning::
Page weighs 3.8 MB (2.9 MB transferred)
Warning::
Images are 2.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.4 MB
Info::
32 HTTP requests
Info::
Estimated 0.62 g CO2 per page load
2.9 MB / 2.4 MB budget
2.9 MB transferred
32 requests
0.62 g CO2 per page load
Images 2.4 MiB 82%
JavaScript 185.7 KiB 6%
Fonts 162.1 KiB 5%
Other 112.0 KiB 4%
CSS 70.1 KiB 2%
HTML 14.5 KiB 0%
Other 542 B 0%
Other 0 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

C
Image Optimization
Action
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://uba.ar/storage/dKgViUZh5ILVIAFi4tniGlfm93o... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://uba.ar/storage/WqKOPBKn5jt9GAzGfwrbdWlsQWU... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://uba.ar/storage/uNfrxusKCC50Bom0LbeIoCTvzAc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uba.ar/storage/vWqLuWCXvO8kGxbp30TJtsx... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://uba.ar/imgs/logofooter.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://uba.ar/imgs/logoheader40anios.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://uba.ar/storage/Vay0PyQmz0QM4FfFldiTSOYvlEj... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 2.4 MB
0 oversized -0 KB
11 legacy format
7 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

B
JS Bundles
4 scripts, 68 KB unused
REVIEW
4 scripts, 68 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-0ST2...: 68 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 68 KB
68 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-0ST2QP5PEG162 KB68 KB (42%)✓3rd
https://cdn.jsdelivr.net/npm/@popperjs/core@2.11.8/dist/umd/popper.min.js7 KB—✓3rd
https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.min.js17 KB—✓3rd
https://www.uba.ar/js/busqueda_general_min.js0 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

C
Page Weight Inventory
Action
32 resources · 2.9 MB · 68 KB savings available
REVIEW
32 resources · 2.9 MB · 68 KB savings available
Warning::
Page weight 1.9 MB over 1MB target
Got: 2.9 MB Expected: ≤ 1 MB
Info::
~68 KB of savings available
Info::
19 third-party resources (37% of weight)
Info::
6 resources over 200KB
32 resources · 2.9 MiB · 19 third-party 1.9 MiB over 1MB target
Image 82% · 2.4 MiB
JavaScript 6% · 185.7 KiB
Font 5% · 162.1 KiB
Media 4% · 112.0 KiB
CSS 2% · 70.1 KiB
Document 0% · 14.5 KiB
Other 0% · 542 B

~68.3 KiB of savings available

Remove unused JavaScript: 68.3 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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

no-cache, private

DirectiveValueMeaning
no-cache—Cache but always revalidate first
private—Only browser cache, not CDN/proxy
A
Third-Party Impact
37% third-party, 0 ms blocking
PASS
37% third-party, 0 ms blocking
Info::
Third-party code accounts for 37% of page weight (1.1 MiB of 2.9 MiB)
Info::
Third-party blocking time is low (0 ms)
63%
37%
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
267ms total JS execution
PASS
267ms total JS execution
Info::
https://uba.ar/: 121ms CPU time
Info::
Unattributable: 94ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-0ST2...: 52ms CPU time
Warning::
Third-party scripts: 146ms (55% of total)

Main Thread Breakdown

Other 41% Style & Layout 23% Script Evaluation 18% Rendering 6% Parse HTML & CSS 5% Script Parsing & Compilation 4% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
https://uba.ar/121ms7ms0ms1st
Unattributable94ms2ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-0ST2QP5PEG52ms40ms9ms3rd
A+
Font Loading
3 fonts (162 KB)
PASS
3 fonts (162 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

162 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s FCP 16.0 s LCP 18.8 shttps://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.3/font/fonts/bootstrap-icons.woff2?24e3eb84d0bcaf83d77f904c78ac1f47bootstrap-icons.woff2 https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.3/font/fonts/bootstrap-icons.woff2?24e3eb84d0bcaf83d77f904c78ac1f47 — 118.7 KiB — 7 ms — font-display: swaphttps://uba.ar/fonts/bitter-regular-webfont.woff2bitter-regular-webfont.... https://uba.ar/fonts/bitter-regular-webfont.woff2 — 22.0 KiB — 5.2 s — font-display: swaphttps://uba.ar/fonts/bitter-bold-webfont.woff2bitter-bold-webfont.woff2 https://uba.ar/fonts/bitter-bold-webfont.woff2 — 21.4 KiB — 6.5 s — font-display: swap
bootstrap-icons.woff2 woff2 swap
Size 119 KB
Load time 7 ms
Start 25.8 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
bitter-regular-webfont.... woff2 swap
Size 22 KB
Load time 5.2 s
Start 25.8 s
Risk FOUT — text flashes from fallback to web font
bitter-bold-webfont.woff2 woff2 swap
Size 21 KB
Load time 6.5 s
Start 25.8 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 ~59 KB and ~118 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
Network Waterfall
32 requests over 38022ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s FCP 16.0 s LCP 18.8 shttps://uba.ar// https://uba.ar/ — 200 — 14.5 KiB — 16.7 s — h2https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.csscdn.jsdelivr.net/npm/bootstrap@5.3.... https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css — 200 — 31.6 KiB — 41 ms — h2https://www.uba.ar/css/animate.csswww.uba.ar/css/animate.css https://www.uba.ar/css/animate.css — 200 — 5.3 KiB — 9.3 s — h2https://www.uba.ar/css/style.csswww.uba.ar/css/style.css https://www.uba.ar/css/style.css — 200 — 5.7 KiB — 3.7 s — h2https://www.uba.ar/css/noticias.csswww.uba.ar/css/noticias.css https://www.uba.ar/css/noticias.css — 200 — 2.6 KiB — 6.8 s — h2https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.3/font/bootstrap-icons.csscdn.jsdelivr.net/npm/bootstrap-icon... https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.3/font/bootstrap-icons.css — 200 — 13.1 KiB — 40 ms — h2https://cdn.jsdelivr.net/npm/@popperjs/core@2.11.8/dist/umd/popper.min.jscdn.jsdelivr.net/npm/@popperjs/core... https://cdn.jsdelivr.net/npm/@popperjs/core@2.11.8/dist/umd/popper.min.js — 200 — 7.1 KiB — 40 ms — h2https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.min.jscdn.jsdelivr.net/npm/bootstrap@5.3.... https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.min.js — 200 — 16.6 KiB — 40 ms — h2https://uba.ar/imgs/logoheader40anios.png/imgs/logoheader40anios.png https://uba.ar/imgs/logoheader40anios.png — 200 — 6.6 KiB — 4.0 s — h2https://uba.ar/storage/dKgViUZh5ILVIAFi4tniGlfm93oXAngCvqoL2kpI.jpg/storage/dKgViUZh5ILVIAFi4tniGlfm93... https://uba.ar/storage/dKgViUZh5ILVIAFi4tniGlfm93oXAngCvqoL2kpI.jpg — 200 — 276.6 KiB — 8.1 s — h2https://cdn.jsdelivr.net/npm/bootstrap-icons@1.9.1/font/bootstrap-icons.csscdn.jsdelivr.net/npm/bootstrap-icon... https://cdn.jsdelivr.net/npm/bootstrap-icons@1.9.1/font/bootstrap-icons.css — 200 — 11.8 KiB — 4 ms — h2https://uba.ar/storage/IHrJslIlTzvUqACDY9U4BV1JoRe4QC6EDzPL4y0c.jpg/storage/IHrJslIlTzvUqACDY9U4BV1JoR... https://uba.ar/storage/IHrJslIlTzvUqACDY9U4BV1JoRe4QC6EDzPL4y0c.jpg — 200 — 179.0 KiB — 11.3 s — h2https://uba.ar/storage/Vay0PyQmz0QM4FfFldiTSOYvlEjca339XJsfZy45.jpg/storage/Vay0PyQmz0QM4FfFldiTSOYvlE... https://uba.ar/storage/Vay0PyQmz0QM4FfFldiTSOYvlEjca339XJsfZy45.jpg — 200 — 510.1 KiB — 6.9 s — h2https://uba.ar/storage/WqKOPBKn5jt9GAzGfwrbdWlsQWUsM1hmoupRaMHd.jpg/storage/WqKOPBKn5jt9GAzGfwrbdWlsQW... https://uba.ar/storage/WqKOPBKn5jt9GAzGfwrbdWlsQWUsM1hmoupRaMHd.jpg — 200 — 271.2 KiB — 5.2 s — h2https://www.uba.ar/js/busqueda_general_min.jswww.uba.ar/js/busqueda_general_min.... https://www.uba.ar/js/busqueda_general_min.js — 200 — 484 B — 6.2 s — h2https://www.googletagmanager.com/gtag/js?id=G-0ST2QP5PEGwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-0ST2QP5PEG — 200 — 161.5 KiB — 151 ms — h2https://uba.ar/storage/uNfrxusKCC50Bom0LbeIoCTvzAczgOTXbX9Cblss.jpg/storage/uNfrxusKCC50Bom0LbeIoCTvzA... https://uba.ar/storage/uNfrxusKCC50Bom0LbeIoCTvzAczgOTXbX9Cblss.jpg — 200 — 488.6 KiB — 12.0 s — h2https://www.uba.ar/storage/vWqLuWCXvO8kGxbp30TJtsxYTJ6ymqKumIg06H4s.jpgwww.uba.ar/storage/vWqLuWCXvO8kGxbp... https://www.uba.ar/storage/vWqLuWCXvO8kGxbp30TJtsxYTJ6ymqKumIg06H4s.jpg — 200 — 216.2 KiB — 5.7 s — h2https://uba.ar/imgs/logofooter.png/imgs/logofooter.png https://uba.ar/imgs/logofooter.png — 200 — 6.1 KiB — 6.2 s — h2data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3…www.w3.org/2000/svg' viewBox='0 0 1... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3… — 200 — 0 B — 0 ms — datadata:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3…www.w3.org/2000/svg' viewBox='0 0 1... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3… — 200 — 0 B — 0 ms — datahttps://www.uba.ar/storage/WinpAOvN6NMBPT8tHiFltrvz8NmHyktV4ngNu59S.jpgwww.uba.ar/storage/WinpAOvN6NMBPT8t... https://www.uba.ar/storage/WinpAOvN6NMBPT8tHiFltrvz8NmHyktV4ngNu59S.jpg — 200 — 263.5 KiB — 5.5 s — h2https://www.uba.ar/storage/7EZzjiWzkwloNnXTmlPqunMGpyq3ouPta9jc6ecK.jpgwww.uba.ar/storage/7EZzjiWzkwloNnXT... https://www.uba.ar/storage/7EZzjiWzkwloNnXTmlPqunMGpyq3ouPta9jc6ecK.jpg — 200 — 171.3 KiB — 6.3 s — h2https://www.uba.ar/storage/So7h828AC01tEkjnMOgFfahBlLrB903UX1UIbVrC.jpgwww.uba.ar/storage/So7h828AC01tEkjn... https://www.uba.ar/storage/So7h828AC01tEkjnMOgFfahBlLrB903UX1UIbVrC.jpg — 200 — 71.5 KiB — 12.3 s — h2https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.3/font/fonts/bootstrap-icons.woff2?24e3eb84d0bcaf83d77f904c78ac1f47cdn.jsdelivr.net/npm/bootstrap-icon... https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.3/font/fonts/bootstrap-icons.woff2?24e3eb84d0bcaf83d77f904c78ac1f47 — 200 — 118.7 KiB — 7 ms — h2https://uba.ar/fonts/bitter-regular-webfont.woff2/fonts/bitter-regular-webfont.woff2 https://uba.ar/fonts/bitter-regular-webfont.woff2 — 200 — 22.0 KiB — 5.2 s — h2https://uba.ar/fonts/bitter-bold-webfont.woff2/fonts/bitter-bold-webfont.woff2 https://uba.ar/fonts/bitter-bold-webfont.woff2 — 200 — 21.4 KiB — 6.5 s — h2https://uba.ar/videos/video-lohiciste.mp4/videos/video-lohiciste.mp4 https://uba.ar/videos/video-lohiciste.mp4 — 206 — 112.0 KiB — 12.0 s — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-0ST2QP5PEG&gtm=45je64h1v9130900022za200zd9130900022&_p=1776818201949&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=634049907.1776818202&frm=0&pscdl=noapi&rcb=1&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266400~117512543~117884344~118463262&sid=1776818202&sct=1&seg=0&dl=https%3A%2F%2Fuba.ar%2F&dt=Universidad%20de%20Buenos%20Aires&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=25963region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-0ST2QP5PEG&gtm=45je64h1v9130900022za200zd9130900022&_p=1776818201949&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=634049907.1776818202&frm=0&pscdl=noapi&rcb=1&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266400~117512543~117884344~118463262&sid=1776818202&sct=1&seg=0&dl=https%3A%2F%2Fuba.ar%2F&dt=Universidad%20de%20Buenos%20Aires&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=25963 — 204 — 542 B — 83 ms — h2data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3…www.w3.org/2000/svg' viewBox='0 0 1... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3… — 200 — 0 B — 0 ms — data
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s FCP 16.0 s LCP 18.8 shttps://uba.ar// https://uba.ar/ — 200 — 14.5 KiB — 16.7 s — h2https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.csscdn.jsdelivr.net/npm/bootstrap@5.3.... https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css — 200 — 31.6 KiB — 41 ms — h2https://www.uba.ar/css/animate.csswww.uba.ar/css/animate.css https://www.uba.ar/css/animate.css — 200 — 5.3 KiB — 9.3 s — h2https://www.uba.ar/css/style.csswww.uba.ar/css/style.css https://www.uba.ar/css/style.css — 200 — 5.7 KiB — 3.7 s — h2https://www.uba.ar/css/noticias.csswww.uba.ar/css/noticias.css https://www.uba.ar/css/noticias.css — 200 — 2.6 KiB — 6.8 s — h2https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.3/font/bootstrap-icons.csscdn.jsdelivr.net/npm/bootstrap-icon... https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.3/font/bootstrap-icons.css — 200 — 13.1 KiB — 40 ms — h2https://cdn.jsdelivr.net/npm/@popperjs/core@2.11.8/dist/umd/popper.min.jscdn.jsdelivr.net/npm/@popperjs/core... https://cdn.jsdelivr.net/npm/@popperjs/core@2.11.8/dist/umd/popper.min.js — 200 — 7.1 KiB — 40 ms — h2https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.min.jscdn.jsdelivr.net/npm/bootstrap@5.3.... https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.min.js — 200 — 16.6 KiB — 40 ms — h2https://uba.ar/imgs/logoheader40anios.png/imgs/logoheader40anios.png https://uba.ar/imgs/logoheader40anios.png — 200 — 6.6 KiB — 4.0 s — h2https://uba.ar/storage/dKgViUZh5ILVIAFi4tniGlfm93oXAngCvqoL2kpI.jpg/storage/dKgViUZh5ILVIAFi4tniGlfm93... https://uba.ar/storage/dKgViUZh5ILVIAFi4tniGlfm93oXAngCvqoL2kpI.jpg — 200 — 276.6 KiB — 8.1 s — h2https://cdn.jsdelivr.net/npm/bootstrap-icons@1.9.1/font/bootstrap-icons.csscdn.jsdelivr.net/npm/bootstrap-icon... 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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
55% of JavaScript execution is third-party
First-party Third-party 146ms · 162KB · AR$503/mo
Unattributable
Other
Costly
Execution 94ms
Transfer 0 KB
Monthly Cost AR$325/mo
Google Tag Manager
Tag Manager
Costly
Execution 52ms
Transfer 162 KB
Unused 42%
Monthly Cost AR$178/mo

These scripts may cost more than they're worth

  • Unattributable adds 94ms and costs ~AR$325/month
  • Google Tag Manager adds 52ms and costs ~AR$178/month

55% 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

Unattributable takes 94ms 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 52ms 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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