Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.11 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.76 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
738 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.004
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.22 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.
12.30 s
Page Load Progression
FPage Weight BudgetAction2.7 MB transferred, 54 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
DJS Execution CostAction2475ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 481ms | 8ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T8BVXM | 436ms | 357ms | 54ms | 3rd |
| https://ki.se/sites/kise/files/js/js_B2e9-xkCsS8xlPL80EWp_Nf84NegRYCT6jHKZBsr3VU.js?scope=header&delta=0&language=sv&theme=kise&include=eJx1j41OwzAMhF8onR8pctJrmuXHxUkL7OmXCSgDhGSdfJ9Oso8jcbQhi-NsHPtku4zZ6Gm312Yc9IYc92a9KMiv8GlaRCcvtaH2_wOKOSr834RIirANvccams2xJjNz58zvUHJY-YiizQSRkGE7BwpDfvsLX_ntJywmRVtQd3rIMA30kK-e2-zo2DHhGJ83WkQ69KQVryd7cVyTnbnQx6Zo8QbT2WU00RGhIqMALk_I9BWjYc70ee_0K1SmRaX2jQO--aZSZPKssjfkOxcnnQk | 400ms | 242ms | 2ms | 1st |
| https://ki.se/sites/kise/files/js/js_Icjwe3JDndpDiMT-08w2mBWT0nZGrhLItaCX6oOye3Y.js?scope=footer&delta=0&language=sv&theme=kise&include=eJx1j41OwzAMhF8onR8pctJrmuXHxUkL7OmXCSgDhGSdfJ9Oso8jcbQhi-NsHPtku4zZ6Gm312Yc9IYc92a9KMiv8GlaRCcvtaH2_wOKOSr834RIirANvccams2xJjNz58zvUHJY-YiizQSRkGE7BwpDfvsLX_ntJywmRVtQd3rIMA30kK-e2-zo2DHhGJ83WkQ69KQVryd7cVyTnbnQx6Zo8QbT2WU00RGhIqMALk_I9BWjYc70ee_0K1SmRaX2jQO--aZSZPKssjfkOxcnnQk | 381ms | 279ms | 74ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-VZD17KHKE3&cx=c>m=4e64k1 | 346ms | 286ms | 58ms | 3rd |
| https://ki.se/ | 283ms | 12ms | 1ms | 1st |
| https://cdn.jsdelivr.net/npm/addsearch-search-ui@0.9/dist/addsearch-search-ui.min.js | 94ms | 61ms | 33ms | 3rd |
| https://cdn.jsdelivr.net/npm/addsearch-js-client@1.1.1/dist/addsearch-js-client.min.js | 55ms | 41ms | 14ms | 3rd |
DJS BundlesAction12 scripts, 491 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://ki.se/sites/kise/files/js/js_Icjwe3JDndpDiMT-08w2mBWT0nZGrhLItaCX6oOye3Y.js?scope=footer&delta=0&language=sv&theme=kise&include=eJx1j41OwzAMhF8onR8pctJrmuXHxUkL7OmXCSgDhGSdfJ9Oso8jcbQhi-NsHPtku4zZ6Gm312Yc9IYc92a9KMiv8GlaRCcvtaH2_wOKOSr834RIirANvccams2xJjNz58zvUHJY-YiizQSRkGE7BwpDfvsLX_ntJywmRVtQd3rIMA30kK-e2-zo2DHhGJ83WkQ69KQVryd7cVyTnbnQx6Zo8QbT2WU00RGhIqMALk_I9BWjYc70ee_0K1SmRaX2jQO--aZSZPKssjfkOxcnnQk | 432 KB | 239 KB (56%) | ✓ | 1st |
| https://ki.se/sites/kise/files/js/js_rcIe6PKHFpXKQdU4B51E7RWIyBCWWhgYe9Vk6KSOspM.js?scope=footer&delta=2&language=sv&theme=kise&include=eJx1j41OwzAMhF8onR8pctJrmuXHxUkL7OmXCSgDhGSdfJ9Oso8jcbQhi-NsHPtku4zZ6Gm312Yc9IYc92a9KMiv8GlaRCcvtaH2_wOKOSr834RIirANvccams2xJjNz58zvUHJY-YiizQSRkGE7BwpDfvsLX_ntJywmRVtQd3rIMA30kK-e2-zo2DHhGJ83WkQ69KQVryd7cVyTnbnQx6Zo8QbT2WU00RGhIqMALk_I9BWjYc70ee_0K1SmRaX2jQO--aZSZPKssjfkOxcnnQk | 70 KB | 60 KB (87%) | ✓ | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-VZD17KHKE3&cx=c>m=4e64k1 | 157 KB | 60 KB (38%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T8BVXM | 138 KB | 57 KB (42%) | ✓ | 3rd |
| https://cdn.jsdelivr.net/npm/addsearch-search-ui@0.9/dist/addsearch-search-ui.min.js | 69 KB | 49 KB (71%) | ✓ | 3rd |
| https://cdn.jsdelivr.net/npm/addsearch-js-client@1.1.1/dist/addsearch-js-client.min.js | 35 KB | 26 KB (76%) | ✓ | 3rd |
| https://ki.se/sites/kise/files/js/js_B2e9-xkCsS8xlPL80EWp_Nf84NegRYCT6jHKZBsr3VU.js?scope=header&delta=0&language=sv&theme=kise&include=eJx1j41OwzAMhF8onR8pctJrmuXHxUkL7OmXCSgDhGSdfJ9Oso8jcbQhi-NsHPtku4zZ6Gm312Yc9IYc92a9KMiv8GlaRCcvtaH2_wOKOSr834RIirANvccams2xJjNz58zvUHJY-YiizQSRkGE7BwpDfvsLX_ntJywmRVtQd3rIMA30kK-e2-zo2DHhGJ83WkQ69KQVryd7cVyTnbnQx6Zo8QbT2WU00RGhIqMALk_I9BWjYc70ee_0K1SmRaX2jQO--aZSZPKssjfkOxcnnQk | 9 KB | — | ✓ | 1st |
| https://ki.se/modules/contrib/google_tag/js/gtag.js?tctsp3 | 1 KB | — | ✓ | 1st |
| https://ki.se/modules/contrib/google_tag/js/gtm.js?tctsp3 | 1 KB | — | ✓ | 1st |
| https://ki.se/sites/kise/files/js/js_naWJ056zqxHckz-9OFhz4p9scZUWYCzqgLfri2VLNtk.js?scope=header&delta=3&language=sv&theme=kise&include=eJx1j41OwzAMhF8onR8pctJrmuXHxUkL7OmXCSgDhGSdfJ9Oso8jcbQhi-NsHPtku4zZ6Gm312Yc9IYc92a9KMiv8GlaRCcvtaH2_wOKOSr834RIirANvccams2xJjNz58zvUHJY-YiizQSRkGE7BwpDfvsLX_ntJywmRVtQd3rIMA30kK-e2-zo2DHhGJ83WkQ69KQVryd7cVyTnbnQx6Zo8QbT2WU00RGhIqMALk_I9BWjYc70ee_0K1SmRaX2jQO--aZSZPKssjfkOxcnnQk | 0 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
DPage Weight InventoryAction54 resources · 2.7 MB · 491 KB savings availableFIX
~491.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 54 resources | 2.7 MiB | ||||||
BImage Optimization27 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
AThird-Party Impact22% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (65 KB)PASS
Web fonts
3
65 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints2 hints, 0 missing preconnectsPASS
Current Resource Hints
2 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+HTTP Cachingmax-age=2700 (45 minutes)PASS
max-age=2700, public
| Directive | Value | Meaning |
|---|---|---|
| max-age | 2700 | Cache for 45 minutes |
| public | — | Any cache may store this response |
Network Waterfall54 requests over 4034msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 481ms | 0 KB | — | kr87/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 436ms | 138 KB | 42% | kr79/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 346ms | 157 KB | 38% | kr63/mo | Costly |
jsDelivr cdn.jsdelivr.net | CDN | 94ms | 69 KB | 71% | kr17/mo | Optional |
jsDelivr cdn.jsdelivr.net | CDN | 55ms | 35 KB | 76% | kr10/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 481ms and costs ~kr87/month
- Google Tag Manager adds 436ms and costs ~kr79/month
- Google Tag Manager adds 346ms and costs ~kr63/month
57% of JavaScript execution time comes from third-party scripts.
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 481ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 436ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 346ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
71% of jsDelivr's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
76% of jsDelivr's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev