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https://helsinki.fi

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
63
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
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.
85
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.

2.41 s

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

3.99 s

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

30 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.002

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

3.33 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.

4.79 s

Page Load Progression

457 ms
915 ms
1.4 s
1.8 s
2.3 s
2.7 s
3.2 s
3.7 s
Checks
15
6 PASS 3 REVIEW 4 FIX
D
Page Weight Budget
Action
2.2 MB transferred, 91 requests
FIX
2.2 MB transferred, 91 requests
Info::
Page weighs 4.3 MB (2.2 MB transferred)
Info::
Fonts are 1.0 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.0 MB
Warning::
JavaScript is 767 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 767 KB
Info::
91 HTTP requests
Info::
Estimated 0.47 g CO2 per page load
2.2 MB / 2.4 MB budget
2.2 MB transferred
91 requests
0.47 g CO2 per page load
Fonts 1.0 MiB 45%
JavaScript 766.7 KiB 33%
Images 405.6 KiB 18%
HTML 48.0 KiB 2%
CSS 31.5 KiB 1%
Other 3.8 KiB 0%
Other 1.4 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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 (2.2 MiB of 2.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
91 resources · 2.2 MB · 235 KB savings available
FIX
91 resources · 2.2 MB · 235 KB savings available
Warning::
Page weight 1.2 MB over 1MB target
Got: 2.2 MB Expected: ≤ 1 MB
Info::
~235 KB of savings available
Warning::
90 third-party resources (100% of weight)
Info::
2 resources over 200KB
91 resources · 2.2 MiB · 90 third-party 1.2 MiB over 1MB target
Font 45% · 1.0 MiB
JavaScript 33% · 766.7 KiB
Image 18% · 407.5 KiB
Document 2% · 48.1 KiB
CSS 1% · 31.5 KiB
Other 0% · 3.2 KiB

~235.4 KiB of savings available

Remove unused JavaScript: 235.4 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.

B
JS Execution Cost
844ms total JS execution
REVIEW
844ms total JS execution
Info::
https://www.helsinki.fi/en: 196ms CPU time
Info::
https://www.helsinki.fi/themes/custom/helsingin_yl...: 190ms CPU time
Info::
Unattributable: 160ms CPU time
Info::
https://consent.cookiebot.com/e422c4ee-0ebe-400c-b...: 149ms CPU time
Info::
https://d2oarllo6tn86.cloudfront.net/sites/helsink...: 86ms CPU time
Warning::
Third-party scripts: 844ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 19% Style & Layout 16% Parse HTML & CSS 7% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://www.helsinki.fi/en196ms2ms0ms3rd
https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/index-2ffe17c9.js190ms164ms0ms3rd
Unattributable160ms13ms0ms3rd
https://consent.cookiebot.com/e422c4ee-0ebe-400c-b22b-9c74b6faeac3/cc.js?renew=false&referer=www.helsinki.fi&dnt=false&init=false149ms62ms12ms3rd
https://d2oarllo6tn86.cloudfront.net/sites/helsinki_fi.js86ms77ms3ms3rd
https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/index-BuQM5G1b.js64ms60ms0ms3rd
C
JS Bundles
Action
65 scripts, 235 KB unused
REVIEW
65 scripts, 235 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5PM...: 86 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://customer.cludo.com/templates/2594/11998/di...: 49 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.helsinki.fi/sites/default/files/js/js_...: 27 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://customer.cludo.com/scripts/bundles/search-...: 25 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.cookiebot.com/e422c4ee-0ebe-400c-b...: 25 KB unused (24%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 235 KB
235 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-5PMSGQ168 KB86 KB (51%)✓3rd
https://customer.cludo.com/templates/2594/11998/dist/js/cludo-search-results.js75 KB49 KB (66%)✓3rd
https://www.helsinki.fi/sites/default/files/js/js_MYhGOsBvUFurx-Db_M6LGjYTEH9Thw6V-YNskMVxFSU.js?scope=footer&delta=0&language=en&theme=helsingin_yliopisto&include=eJyF0EEOAjEIBdALSTySoVNsiRQaYdTe3ro0GeuGxf8vf0ElcdbCehnC1tnDzpmci4IPD2ognE71QBWxhAIeM9JySCpqFoJN9myQSXCsWIm2QmOWfgvroPjggsGmv2SzxHPxD1R6Olxxi2Qv6Oa8lp8jFEH3Nd4rfH3wDW65jb838 KB27 KB (74%)✓3rd
https://customer.cludo.com/scripts/bundles/search-script.min.js51 KB25 KB (52%)✓3rd
https://consent.cookiebot.com/e422c4ee-0ebe-400c-b22b-9c74b6faeac3/cc.js?renew=false&referer=www.helsinki.fi&dnt=false&init=false106 KB25 KB (24%)✓3rd
https://consent.cookiebot.com/uc.js36 KB23 KB (64%)✓3rd
https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/js/hy-news-factbox-position.min.js?v=1.x1 KB—✓3rd
https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-cta-link.entry.js2 KB—✓3rd
https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-box.entry.js2 KB—✓3rd
https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-breadcrumbs_15.entry.js26 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+
Image Optimization
11 images, 0 KB saveable
PASS
11 images, 0 KB saveable
Info::
All images are well-optimized
11 images 406 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
2 fonts (1037 KB)
PASS
2 fonts (1037 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

1037 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.4 s LCP 4.0 shttps://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds/fonts/OpenSans-VariableFont_wdth,wght.ttfOpenSans-VariableFont_w... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds/fonts/OpenSans-VariableFont_wdth,wght.ttf — 518.4 KiB — 886 ms — font-display: swaphttps://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds/fonts/OpenSans-VariableFont_wdth%2Cwght.ttfOpenSans-VariableFont_w... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds/fonts/OpenSans-VariableFont_wdth%2Cwght.ttf — 518.4 KiB — 580 ms — font-display: swap
OpenSans-VariableFont_w... ttf swap
Size 518 KB
Load time 886 ms
Start 1.8 s
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
OpenSans-VariableFont_w... ttf swap
Size 518 KB
Load time 580 ms
Start 2.3 s
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
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 ~829 KB and ~1658 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
91 requests over 6886ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 2.4 s LCP 4.0 shttps://helsinki.fi// https://helsinki.fi/ — 301 — 116 B — 690 ms — h2https://www.helsinki.fi/www.helsinki.fi/ https://www.helsinki.fi/ — 302 — 108 B — 945 ms — h2https://www.helsinki.fi/enwww.helsinki.fi/en https://www.helsinki.fi/en — 200 — 47.2 KiB — 537 ms — h2https://www.helsinki.fi/assets/drupal/styles/hero_image_tablet/s3/media-image/HY_tutkimuksen_karjet_tulevaisuuden_teknologiat-1920x1200.jpg.webp?itok=oWIZRAjmwww.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/hero_image_tablet/s3/media-image/HY_tutkimuksen_karjet_tulevaisuuden_teknologiat-1920x1200.jpg.webp?itok=oWIZRAjm — 200 — 39.8 KiB — 523 ms — h2https://consent.cookiebot.com/uc.jsconsent.cookiebot.com/uc.js https://consent.cookiebot.com/uc.js — 200 — 35.7 KiB — 50 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/globalScript-3f479486.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/globalScript-3f479486.js — 200 — 1.1 KiB — 369 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/huds-lib.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/huds-lib.js — 200 — 8.4 KiB — 523 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-box.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-box.entry.js — 200 — 2.4 KiB — 373 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-breadcrumbs_15.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-breadcrumbs_15.entry.js — 200 — 25.9 KiB — 533 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-hero-carousel.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-hero-carousel.entry.js — 200 — 39.8 KiB — 534 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-caret-down.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-caret-down.entry.js — 200 — 1.3 KiB — 522 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-caret-left.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-caret-left.entry.js — 200 — 1.2 KiB — 522 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-caret-right.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-caret-right.entry.js — 200 — 1.3 KiB — 549 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-caret-up.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-caret-up.entry.js — 200 — 1.2 KiB — 891 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-globe.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-globe.entry.js — 200 — 1.7 KiB — 547 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-heart-support.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-heart-support.entry.js — 200 — 1.8 KiB — 891 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-hy-logo.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-hy-logo.entry.js — 200 — 1.7 KiB — 548 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-search.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-search.entry.js — 200 — 1.6 KiB — 544 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-image.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-image.entry.js — 200 — 2.1 KiB — 546 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-main.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-main.entry.js — 200 — 1.6 KiB — 547 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/index-2ffe17c9.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/index-2ffe17c9.js — 200 — 11.1 KiB — 908 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/utils-1e7f5184.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/utils-1e7f5184.js — 200 — 2.4 KiB — 697 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds/fonts/OpenSans-VariableFont_wdth,wght.ttfwww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds/fonts/OpenSans-VariableFont_wdth,wght.ttf — 200 — 518.4 KiB — 886 ms — h2https://www.helsinki.fi/sites/default/files/css/css_7ooxM-l6bf4zWn8YrkxVGWxVQ4sag9qSeLiN6ZTOY8M.css?delta=0&language=en&theme=helsingin_yliopisto&include=eJyNjtEKwyAMRX-oqZ8kOjMNZEaMdvj3swxaBj7sMSfnJjchK-VI2Q4mKaRNTEClmEGHNnwBk9_Swoos3jFomyjHpdIT_Nz6S4Kn5KZL9aCAUqS2-fcgfMNDpzgsz60trrpYXUkmDTgJXAS8U9yuUU2ovTjeb7L3XLqfqYRh-_YwZ-gDdtlx6gwww.helsinki.fi/sites/default/files... https://www.helsinki.fi/sites/default/files/css/css_7ooxM-l6bf4zWn8YrkxVGWxVQ4sag9qSeLiN6ZTOY8M.css?delta=0&language=en&theme=helsingin_yliopisto&include=eJyNjtEKwyAMRX-oqZ8kOjMNZEaMdvj3swxaBj7sMSfnJjchK-VI2Q4mKaRNTEClmEGHNnwBk9_Swoos3jFomyjHpdIT_Nz6S4Kn5KZL9aCAUqS2-fcgfMNDpzgsz60trrpYXUkmDTgJXAS8U9yuUU2ovTjeb7L3XLqfqYRh-_YwZ-gDdtlx6g — 200 — 2.1 KiB — 355 ms — h2https://www.helsinki.fi/sites/default/files/css/css_npEOgbjruB-hkfvRZivYjKiLiZ1yQ1HeYXLi7ZVR3Xw.css?delta=1&language=en&theme=helsingin_yliopisto&include=eJyNjtEKwyAMRX-oqZ8kOjMNZEaMdvj3swxaBj7sMSfnJjchK-VI2Q4mKaRNTEClmEGHNnwBk9_Swoos3jFomyjHpdIT_Nz6S4Kn5KZL9aCAUqS2-fcgfMNDpzgsz60trrpYXUkmDTgJXAS8U9yuUU2ovTjeb7L3XLqfqYRh-_YwZ-gDdtlx6gwww.helsinki.fi/sites/default/files... 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h2https://www.helsinki.fi/assets/drupal/styles/hero_image/s3/media-image/HY_tutkimuksen_karjet_tulevaisuuden_teknologiat-1920x1200.jpg.webp?itok=8fjZxHRJwww.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/hero_image/s3/media-image/HY_tutkimuksen_karjet_tulevaisuuden_teknologiat-1920x1200.jpg.webp?itok=8fjZxHRJ — 200 — 89.6 KiB — 184 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-link-with-arrow.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-link-with-arrow.entry.js — 200 — 2.5 KiB — 193 ms — h2https://fi1.frosmo.com/locationfi1.frosmo.com/location https://fi1.frosmo.com/location — 200 — 696 B — 522 ms — http/1.1https://fi1.frosmo.com/messageApi?method=multifetch&origin=helsinki_fi&cookieId=anonymous.00000000&positions=2057.5129.5130.5131.5132.5652.5436.4693.4692.4691.4690.4689.4688.4687.4686.4685.4385&states=%7B%22_device%22%3A%22desktop%22%2C%22loginStatus%22%3A%22unauthenticated%22%7D&debug=false&_source=core&_ts=1776805310055&_ver=26.1.0-3.6&segments=&source=direct&sessionStart=20260421210149&profile=opt-outfi1.frosmo.com/messageApi?method=mu... https://fi1.frosmo.com/messageApi?method=multifetch&origin=helsinki_fi&cookieId=anonymous.00000000&positions=2057.5129.5130.5131.5132.5652.5436.4693.4692.4691.4690.4689.4688.4687.4686.4685.4385&states=%7B%22_device%22%3A%22desktop%22%2C%22loginStatus%22%3A%22unauthenticated%22%7D&debug=false&_source=core&_ts=1776805310055&_ver=26.1.0-3.6&segments=&source=direct&sessionStart=20260421210149&profile=opt-out — 200 — 675 B — 507 ms — http/1.1https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-arrow-up.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-arrow-up.entry.js — 200 — 1.3 KiB — 182 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-cta-link.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-cta-link.entry.js — 200 — 2.0 KiB — 181 ms — h2https://www.helsinki.fi/assets/drupal/styles/cta_liftup_image_text_adjacent_3_2/s3/media-image/HY_tutkimuksen_karjet_yksilollinen_terveys-1920x1200.jpg.webp?itok=P1YenJdgwww.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/cta_liftup_image_text_adjacent_3_2/s3/media-image/HY_tutkimuksen_karjet_yksilollinen_terveys-1920x1200.jpg.webp?itok=P1YenJdg — 200 — 94.1 KiB — 187 ms — h2https://www.helsinki.fi/assets/drupal/styles/cta_liftup_image_text_adjacent_3_2/s3/media-image/HY_tyonantaja_MGL0477_p%C3%A4%C3%A4kuva_p%C3%A4%C3%A4rakennus_Hector%20ja%20Hisayo.jpg.webp?itok=tZgC-NHMwww.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/cta_liftup_image_text_adjacent_3_2/s3/media-image/HY_tyonantaja_MGL0477_p%C3%A4%C3%A4kuva_p%C3%A4%C3%A4rakennus_Hector%20ja%20Hisayo.jpg.webp?itok=tZgC-NHM — 200 — 44.9 KiB — 185 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-remove.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-remove.entry.js — 200 — 1.3 KiB — 182 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-arrow-right.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-arrow-right.entry.js — 200 — 1.3 KiB — 182 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-facebook.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-facebook.entry.js — 200 — 1.4 KiB — 190 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-youtube.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-youtube.entry.js — 200 — 1.4 KiB — 193 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-linkedin.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-linkedin.entry.js — 200 — 1.6 KiB — 191 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-instagram.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-instagram.entry.js — 200 — 1.8 KiB — 191 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-tiktok.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-some-tiktok.entry.js — 200 — 2.0 KiB — 190 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-arrow-to-right.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/hudslib-0.12.0/esm/hy-icon-arrow-to-right.entry.js — 200 — 1.4 KiB — 188 ms — h2https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/lehma2_web.jpg.webp?itok=D5eIXitBwww.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/lehma2_web.jpg.webp?itok=D5eIXitB — 200 — 16.3 KiB — 212 ms — h2https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/meliorkuva2.jpg.webp?itok=0lI423m5www.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/meliorkuva2.jpg.webp?itok=0lI423m5 — 200 — 12.2 KiB — 209 ms — h2https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/1500_Main%2Bbuilding%2B2908-13_photo%2BHY_Linda%2BTammisto_5.jpg.webp?itok=ixVCVGf8www.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/1500_Main%2Bbuilding%2B2908-13_photo%2BHY_Linda%2BTammisto_5.jpg.webp?itok=ixVCVGf8 — 200 — 28.1 KiB — 211 ms — h2https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/Opiskelua-Minervassa-photo-Veikko-Somerpuro.jpg.webp?itok=328wYwaqwww.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/Opiskelua-Minervassa-photo-Veikko-Somerpuro.jpg.webp?itok=328wYwaq — 200 — 18.0 KiB — 211 ms — h2https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/KILPISJARVI_07_kest%C3%A4vyystutkimus.jpg.webp?itok=CwToU4xSwww.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/KILPISJARVI_07_kest%C3%A4vyystutkimus.jpg.webp?itok=CwToU4xS — 200 — 40.1 KiB — 210 ms — h2https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/his-slush.jpg.webp?itok=sMzv8ZY6www.helsinki.fi/assets/drupal/style... https://www.helsinki.fi/assets/drupal/styles/linkbox_image_16_10_mobile/s3/media-image/his-slush.jpg.webp?itok=sMzv8ZY6 — 200 — 22.6 KiB — 210 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/favicon.icowww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/favicon.ico — 200 — 1.2 KiB — 203 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/index-BfTCfPZ1.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/index-BfTCfPZ1.js — 200 — 1.3 KiB — 201 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/attributes-CS-f1DU8.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/attributes-CS-f1DU8.js — 200 — 1.5 KiB — 206 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/linkUtils-BNCHswss.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/linkUtils-BNCHswss.js — 200 — 1.1 KiB — 207 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/utils-BZWvtXT4.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/utils-BZWvtXT4.js — 200 — 1.3 KiB — 208 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/cx-R83ghDub.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/cx-R83ghDub.js — 200 — 990 B — 234 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/store-sjnG0AVN.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/store-sjnG0AVN.js — 200 — 1.9 KiB — 235 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-icon.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-icon.entry.js — 200 — 1.5 KiB — 183 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-visually-hidden.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-visually-hidden.entry.js — 200 — 1.2 KiB — 183 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-icon-arrow-forward.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-icon-arrow-forward.entry.js — 200 — 1.3 KiB — 183 ms — h2https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-icon-arrow-outward.entry.jswww.helsinki.fi/themes/custom/helsi... https://www.helsinki.fi/themes/custom/helsingin_yliopisto/dist/uhds-1.0.1/component-library/ds-icon-arrow-outward.entry.js — 200 — 1.3 KiB — 183 ms — h2https://customer.cludo.com/scripts/bundles/search-script.min.jscustomer.cludo.com/scripts/bundles/... https://customer.cludo.com/scripts/bundles/search-script.min.js — 200 — 51.1 KiB — 9 ms — h2https://customer.cludo.com/templates/2594/11998/dist/js/cludo-search-results.jscustomer.cludo.com/templates/2594/1... https://customer.cludo.com/templates/2594/11998/dist/js/cludo-search-results.js — 200 — 75.4 KiB — 9 ms — h2https://api.cludo.com/api/v3/2594/14064/websites/publicsettingsapi.cludo.com/api/v3/2594/14064/web... https://api.cludo.com/api/v3/2594/14064/websites/publicsettings — 200 — 0 B — 503 ms — h2https://api.cludo.com/api/v3/2594/14064/websites/publicsettingsapi.cludo.com/api/v3/2594/14064/web... https://api.cludo.com/api/v3/2594/14064/websites/publicsettings — 200 — 1.5 KiB — 182 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-5PMSGQwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-5PMSGQ — 200 — 168.0 KiB — 161 ms — h2
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 844ms · 210KB · €9/mo
www.helsinki.fi
Other
Optional
Execution 196ms
Transfer 47 KB
Monthly Cost €2/mo
www.helsinki.fi
Other
Optional
Execution 190ms
Transfer 11 KB
Monthly Cost €2/mo
Unattributable
Other
Optional
Execution 160ms
Transfer 0 KB
Monthly Cost €2/mo
consent.cookiebot.com
Other
Optional
Execution 149ms
Transfer 106 KB
Unused 24%
Monthly Cost €2/mo
d2oarllo6tn86.cloudfront.net
Other
Optional
Execution 86ms
Transfer 25 KB
Monthly Cost €1/mo
www.helsinki.fi
Other
Optional
Execution 64ms
Transfer 21 KB
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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