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https://ugr.es

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
4
REVIEW
4
PASS
5
INFO
2

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

Mobile Desktop
64
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.

1.70 s

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

2.37 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.

0.282

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

1.85 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.

2.38 s

Page Load Progression

503 ms
1.0 s
1.5 s
2.0 s
2.5 s
3.0 s
3.5 s
4.0 s
Checks
15
5 PASS 4 REVIEW 4 FIX
F
Page Weight Budget
Action
9.7 MB transferred, 76 requests
FIX
9.7 MB transferred, 76 requests
Critical::
Page weighs 11.7 MB (9.7 MB transferred)
Warning::
Images are 8.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 8.2 MB
Info::
Fonts are 757 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 757 KB
Warning::
JavaScript is 671 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 671 KB
Info::
76 HTTP requests
Info::
Estimated 2.0 g CO2 per page load
9.7 MB / 2.4 MB budget
9.7 MB transferred
76 requests
2.0 g CO2 per page load
Images 8.2 MiB 84%
Fonts 756.9 KiB 8%
JavaScript 671.2 KiB 7%
CSS 88.5 KiB 1%
HTML 17.9 KiB 0%
Other 15.8 KiB 0%
Other 4.8 KiB 0%
Other 1.0 KiB 0%
Other 357 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

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

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

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 (9.7 MiB of 9.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
76 resources · 9.7 MB · 294 KB savings available
FIX
76 resources · 9.7 MB · 294 KB savings available
Warning::
Page weight 8.7 MB over 1MB target
Got: 9.7 MB Expected: ≤ 1 MB
Info::
~294 KB of savings available
Warning::
75 third-party resources (100% of weight)
Info::
1 resources over 200KB
76 resources · 9.7 MiB · 75 third-party 8.7 MiB over 1MB target
Image 85% · 8.2 MiB
Font 8% · 756.9 KiB
JavaScript 7% · 671.2 KiB
CSS 1% · 88.5 KiB
Document 0% · 18.4 KiB
Other 0% · 6.2 KiB

~294.0 KiB of savings available

Remove unused JavaScript: 294.0 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
Image Optimization
Action
38 images, 0 KB saveable
REVIEW
38 images, 0 KB saveable
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/themes/custom/ugr/logo-footer.s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/themes/custom/ugr/aupa.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/themes/custom/ugr/excelencia.sv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/themes/custom/ugr/ugr-horizonta... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/themes/custom/ugr/arqus-allianc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/themes/custom/ugr/universia.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/themes/custom/ugr/transparencia... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/themes/custom/ugr/pactodigital.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ugr.es/sites/default/files/styles/home... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
38 images 8.2 MB
0 oversized -0 KB
16 legacy format
30 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

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 Execution Cost
732ms total JS execution
REVIEW
732ms total JS execution
Warning::
Unattributable: 310ms CPU time
Info::
https://www.ugr.es/: 197ms CPU time
Info::
https://www.ugr.es/sites/default/files/js/js_WTVW5...: 159ms CPU time
Info::
https://chat.1millionbot.com/app.js: 66ms CPU time
Warning::
Third-party scripts: 732ms (100% of total)

Main Thread Breakdown

Other 43% Script Evaluation 25% Style & Layout 17% Rendering 8% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
Unattributable310ms19ms0ms3rd
https://www.ugr.es/197ms2ms1ms3rd
https://www.ugr.es/sites/default/files/js/js_WTVW5OyrPr8NSr1yuCI7nQh-zkpryUjKMLc9S7vupB4.js159ms65ms5ms3rd
https://chat.1millionbot.com/app.js66ms47ms10ms3rd
C
JS Bundles
Action
14 scripts, 294 KB unused
REVIEW
14 scripts, 294 KB unused
Warning::
https://chat.1millionbot.com/app.js: 67 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-1VP3...: 66 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-406...: 63 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ugr.es/sites/default/files/js/js_WTVW5...: 39 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://analiticasweb.ugr.es/matomo.js: 37 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 294 KB
294 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://chat.1millionbot.com/app.js147 KB67 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-1VP321ZLLY&cx=c&gtm=4e64h1156 KB66 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-4060598-1116 KB63 KB (54%)✓3rd
https://www.ugr.es/sites/default/files/js/js_WTVW5OyrPr8NSr1yuCI7nQh-zkpryUjKMLc9S7vupB4.js85 KB39 KB (47%)✓3rd
https://analiticasweb.ugr.es/matomo.js67 KB37 KB (56%)✓3rd
https://static.addtoany.com/menu/modules/core.ydpp7jcu.js26 KB21 KB (82%)✓3rd
https://www.ugr.es/sites/default/files/js/js_D_8wJawH1m-H9UDH7TEHvS5mZVSqEJp8SFYjlVtnF4A.js6 KB—✓3rd
https://static.addtoany.com/menu/page.js2 KB—✓3rd
https://www.google-analytics.com/analytics.js21 KB—✓3rd
https://www.ugr.es/sites/default/files/js/js_IPucdXasf5_zcHpwJWl1SVEfbJv3v1IjbVjridjqb1s.js2 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

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
11 fonts (757 KB)
PASS
11 fonts (757 KB)
Info::
11 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

11

757 KB total

Render-blocking

0

of 11

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 1.7 s LCP 2.4 shttps://www.ugr.es/themes/custom/ugr/src/fonts/GillSans.woffGillSans.woff https://www.ugr.es/themes/custom/ugr/src/fonts/GillSans.woff — 43.0 KiB — 28 ms — font-display: swaphttps://www.ugr.es/themes/custom/ugr/src/fonts/GillSans-LightItalic.woffGillSans-LightItalic.woff https://www.ugr.es/themes/custom/ugr/src/fonts/GillSans-LightItalic.woff — 56.4 KiB — 187 ms — font-display: swaphttps://www.ugr.es/themes/custom/ugr/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://www.ugr.es/themes/custom/ugr/webfonts/fa-brands-400.woff2 — 107.8 KiB — 290 ms — font-display: swaphttps://www.ugr.es/themes/custom/ugr/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://www.ugr.es/themes/custom/ugr/webfonts/fa-solid-900.woff2 — 147.1 KiB — 290 ms — font-display: swaphttps://www.ugr.es/themes/custom/ugr/src/fonts/GillSans-SemiBold.woffGillSans-SemiBold.woff https://www.ugr.es/themes/custom/ugr/src/fonts/GillSans-SemiBold.woff — 27.0 KiB — 307 ms — font-display: swaphttps://www.ugr.es/themes/custom/ugr/src/fonts/MinionPro-Regular.woffMinionPro-Regular.woff https://www.ugr.es/themes/custom/ugr/src/fonts/MinionPro-Regular.woff — 122.6 KiB — 355 ms — font-display: swaphttps://www.ugr.es/themes/custom/ugr/src/fonts/MinionPro-Medium.woffMinionPro-Medium.woff https://www.ugr.es/themes/custom/ugr/src/fonts/MinionPro-Medium.woff — 122.6 KiB — 412 ms — font-display: swaphttps://www.ugr.es/themes/custom/ugr/src/fonts/GillSans-Light.woffGillSans-Light.woff https://www.ugr.es/themes/custom/ugr/src/fonts/GillSans-Light.woff — 55.1 KiB — 418 ms — font-display: swaphttps://fonts.gstatic.com/s/montserrat/v31/JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCtr6Hw5aXp-p7K4KLg.woff2JTUHjIg1_i6t8kCHKm4532V... https://fonts.gstatic.com/s/montserrat/v31/JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCtr6Hw5aXp-p7K4KLg.woff2 — 16.1 KiB — 27 ms — font-display: swaphttps://www.ugr.es/themes/custom/ugr/webfonts/fa-regular-400.woff2fa-regular-400.woff2 https://www.ugr.es/themes/custom/ugr/webfonts/fa-regular-400.woff2 — 24.5 KiB — 22 ms — font-display: swaphttps://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2JTUSjIg1_i6t8kCHKm459Wl... https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2 — 34.7 KiB — 34 ms — font-display: swap
GillSans.woff woff swap
Size 43 KB
Load time 28 ms
Start 336 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
GillSans-LightItalic.woff woff swap
Size 56 KB
Load time 187 ms
Start 405 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
fa-brands-400.woff2 woff2 swap
Size 108 KB
Load time 290 ms
Start 405 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
fa-solid-900.woff2 woff2 swap
Size 147 KB
Load time 290 ms
Start 405 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
GillSans-SemiBold.woff woff swap
Size 27 KB
Load time 307 ms
Start 405 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
MinionPro-Regular.woff woff swap
Size 123 KB
Load time 355 ms
Start 405 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
MinionPro-Medium.woff woff swap
Size 123 KB
Load time 412 ms
Start 406 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
GillSans-Light.woff woff swap
Size 55 KB
Load time 418 ms
Start 406 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
JTUHjIg1_i6t8kCHKm4532V... woff2 swap
Size 16 KB
Load time 27 ms
Start 406 ms
Risk FOUT — text flashes from fallback to web font
fa-regular-400.woff2 woff2 swap
Size 24 KB
Load time 22 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
JTUSjIg1_i6t8kCHKm459Wl... woff2 swap
Size 35 KB
Load time 34 ms
Start 3.7 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 ~378 KB and ~756 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
76 requests over 3772ms
INFO
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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 732ms · 249KB · €4/mo
Unattributable
Other
Costly
Execution 310ms
Transfer 0 KB
Monthly Cost €2/mo
www.ugr.es
Other
Optional
Execution 197ms
Transfer 17 KB
Monthly Cost €1/mo
www.ugr.es
Other
Optional
Execution 159ms
Transfer 85 KB
Unused 47%
Monthly Cost €1/mo
chat.1millionbot.com
Other
Optional
Execution 66ms
Transfer 147 KB
Unused 46%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Unattributable adds 310ms and costs ~€2/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

Unattributable takes 310ms 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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