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https://yr.no

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
3
REVIEW
5
PASS
5
INFO
2

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

Mobile Desktop
98
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.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

885 ms

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

905 ms

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

14 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.

986 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.48 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
5 PASS 5 REVIEW 3 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 (1.8 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
62 resources · 1.8 MB · 151 KB savings available
FIX
62 resources · 1.8 MB · 151 KB savings available
Warning::
Page weight 839 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~151 KB of savings available
Warning::
61 third-party resources (100% of weight)
Info::
4 resources over 200KB
62 resources · 1.8 MiB · 61 third-party 838.6 KiB over 1MB target
Image 60% · 1.1 MiB
JavaScript 19% · 353.5 KiB
Font 14% · 253.4 KiB
Document 4% · 67.8 KiB
Other 2% · 38.0 KiB
CSS 2% · 29.0 KiB

~151.1 KiB of savings available

Remove unused JavaScript: 151.1 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
1.8 MB transferred, 62 requests
REVIEW
1.8 MB transferred, 62 requests
Info::
Page weighs 3.3 MB (1.8 MB transferred)
Warning::
Images are 1.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.1 MB
Info::
Fonts are 253 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 253 KB
Info::
62 HTTP requests
Info::
Estimated 0.38 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
62 requests
0.38 g CO2 per page load
Images 1.1 MiB 60%
JavaScript 353.5 KiB 19%
Fonts 253.4 KiB 14%
HTML 67.8 KiB 4%
Other 35.9 KiB 2%
CSS 29.0 KiB 2%
Other 2.6 KiB 0%
Other 1.6 KiB 0%
Other 197 B 0%
Other 18 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

B
Image Optimization
22 images, 0 KB saveable
REVIEW
22 images, 0 KB saveable
Info::
All images are well-optimized
22 images 1.1 MB
0 oversized -0 KB
9 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
944ms total JS execution
REVIEW
944ms total JS execution
Warning::
https://www.yr.no/assets/js/index.c7821426a34a7d4e...: 492ms CPU time
Warning::
Unattributable: 253ms CPU time
Info::
https://www.yr.no/nb: 200ms CPU time
Warning::
Third-party scripts: 944ms (100% of total)

Main Thread Breakdown

Script Evaluation 56% Other 25% Style & Layout 10% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.yr.no/assets/js/index.c7821426a34a7d4e743f.js492ms442ms1ms3rd
Unattributable253ms68ms0ms3rd
https://www.yr.no/nb200ms10ms8ms3rd
C
JS Bundles
Action
10 scripts, 151 KB unused
REVIEW
10 scripts, 151 KB unused
Warning::
https://www.yr.no/assets/js/index.c7821426a34a7d4e...: 151 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 151 KB
151 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.yr.no/assets/js/index.c7821426a34a7d4e743f.js278 KB151 KB (55%)✓3rd
https://www.yr.no/assets/js/runtime~index.87b2981cc8fee64c8a60.js6 KB—✓3rd
https://www.yr.no/assets/js/70.84ad7fec825f97438759.js7 KB—✓3rd
https://www.yr.no/assets/js/7040.439fd46c3a70b3281c5c.js6 KB—✓3rd
https://www.yr.no/assets/js/9078.005fd57057ab6d18f4d7.js7 KB—✓3rd
https://www.yr.no/assets/js/pages-home-HomePage.795136c3d3cdeebe2006.js9 KB—✓3rd
https://www.yr.no/assets/js/4458.ee42eb8b1d1772be3654.js12 KB—✓3rd
https://static.nrk.no/core-analytics/major/6/statistics/unispring.min.js2 KB—✓3rd
https://static.nrk.no/core-analytics/major/6/statistics/tns.min.js2 KB—✓3rd
https://log.medietall.no/analytics.v2.js25 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
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
1 fonts (253 KB)
PASS
1 fonts (253 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

253 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 885 ms LCP 905 mshttps://static.nrk.no/nrk-sans/1.2.1/NRKSans_Variable.woff2NRKSans_Variable.woff2 https://static.nrk.no/nrk-sans/1.2.1/NRKSans_Variable.woff2 — 253.4 KiB — 70 ms — font-display: swap
NRKSans_Variable.woff2 woff2 swap
Size 253 KB
Load time 70 ms
Start 530 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
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 ~127 KB and ~254 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
62 requests over 2343ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 885 ms LCP 905 mshttps://yr.no// https://yr.no/ — 301 — 207 B — 19 ms — http/1.1https://www.yr.no/www.yr.no/ https://www.yr.no/ — 302 — 85 B — 39 ms — h2https://www.yr.no/nbwww.yr.no/nb https://www.yr.no/nb — 200 — 67.8 KiB — 328 ms — h2https://www.yr.no/assets/css/2016.b00e8390a9b6c11b0622.csswww.yr.no/assets/css/2016.b00e8390a... https://www.yr.no/assets/css/2016.b00e8390a9b6c11b0622.css — 200 — 7.3 KiB — 40 ms — h2https://www.yr.no/assets/css/index.20b4b507dd681bbfc2c2.csswww.yr.no/assets/css/index.20b4b507... https://www.yr.no/assets/css/index.20b4b507dd681bbfc2c2.css — 200 — 21.7 KiB — 44 ms — h2https://www.yr.no/assets/js/runtime~index.87b2981cc8fee64c8a60.jswww.yr.no/assets/js/runtime~index.8... https://www.yr.no/assets/js/runtime~index.87b2981cc8fee64c8a60.js — 200 — 5.9 KiB — 44 ms — h2https://www.yr.no/assets/js/index.c7821426a34a7d4e743f.jswww.yr.no/assets/js/index.c7821426a... https://www.yr.no/assets/js/index.c7821426a34a7d4e743f.js — 200 — 278.2 KiB — 102 ms — h2https://www.yr.no/assets/js/70.84ad7fec825f97438759.jswww.yr.no/assets/js/70.84ad7fec825f... https://www.yr.no/assets/js/70.84ad7fec825f97438759.js — 200 — 7.3 KiB — 92 ms — h2https://www.yr.no/assets/js/7040.439fd46c3a70b3281c5c.jswww.yr.no/assets/js/7040.439fd46c3a... https://www.yr.no/assets/js/7040.439fd46c3a70b3281c5c.js — 200 — 5.7 KiB — 93 ms — h2https://www.yr.no/assets/js/9078.005fd57057ab6d18f4d7.jswww.yr.no/assets/js/9078.005fd57057... https://www.yr.no/assets/js/9078.005fd57057ab6d18f4d7.js — 200 — 7.5 KiB — 94 ms — h2https://www.yr.no/assets/js/pages-home-HomePage.795136c3d3cdeebe2006.jswww.yr.no/assets/js/pages-home-Home... https://www.yr.no/assets/js/pages-home-HomePage.795136c3d3cdeebe2006.js — 200 — 8.6 KiB — 97 ms — h2https://www.yr.no/assets/manifest-nb.jsonwww.yr.no/assets/manifest-nb.json https://www.yr.no/assets/manifest-nb.json — 200 — 1.6 KiB — 63 ms — h2data:image/jpeg;base64,/9j/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYn…data:image/jpeg;base64,/9j/2wBDAAYE... data:image/jpeg;base64,/9j/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYn… — 200 — 0 B — 0 ms — datadata:image/jpeg;base64,/9j/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYn…data:image/jpeg;base64,/9j/2wBDAAYE... data:image/jpeg;base64,/9j/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYn… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAMCAYAAABiDJ37AAAACXBIWXMAAA7DAAAOwwHHb6hkAAAC9…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAMCAYAAABiDJ37AAAACXBIWXMAAA7DAAAOwwHHb6hkAAAC9… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAALCAYAAAB/Ca1DAAAACXBIWXMAAA7DAAAOwwHHb6hkAAAC/…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAALCAYAAAB/Ca1DAAAACXBIWXMAAA7DAAAOwwHHb6hkAAAC/… — 200 — 0 B — 0 ms — datadata:image/jpeg;base64,/9j/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYn…data:image/jpeg;base64,/9j/2wBDAAYE... data:image/jpeg;base64,/9j/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYn… — 200 — 0 B — 0 ms — datadata:image/jpeg;base64,/9j/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYn…data:image/jpeg;base64,/9j/2wBDAAYE... data:image/jpeg;base64,/9j/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYn… — 200 — 0 B — 0 ms — datahttps://www.yr.no/meteorologene/images/pigu6bjm/production/b8a738065e6d90063a4ec31984f1819a5fc93b18-1502x1036.gif?auto=format&fit=max&q=75&w=1000www.yr.no/meteorologene/images/pigu... https://www.yr.no/meteorologene/images/pigu6bjm/production/b8a738065e6d90063a4ec31984f1819a5fc93b18-1502x1036.gif?auto=format&fit=max&q=75&w=1000 — 200 — 505.9 KiB — 591 ms — h2https://www.yr.no/meteorologene/images/pigu6bjm/production/38048a20d428c0d105cc91376152f81e91cd10cc-1502x1036.gif?auto=format&fit=max&q=75&w=1000www.yr.no/meteorologene/images/pigu... https://www.yr.no/meteorologene/images/pigu6bjm/production/38048a20d428c0d105cc91376152f81e91cd10cc-1502x1036.gif?auto=format&fit=max&q=75&w=1000 — 200 — 423.1 KiB — 571 ms — h2https://www.yr.no/meteorologene/images/pigu6bjm/production/bedd073373e83f0a4668db8f7db092dee6b653b2-1291x793.png?auto=format&fit=max&q=75&w=500www.yr.no/meteorologene/images/pigu... https://www.yr.no/meteorologene/images/pigu6bjm/production/bedd073373e83f0a4668db8f7db092dee6b653b2-1291x793.png?auto=format&fit=max&q=75&w=500 — 200 — 41.2 KiB — 52 ms — h2https://www.yr.no/meteorologene/images/pigu6bjm/production/75be3c73c087f86117e832dbcf32223d85679680-1166x660.png?auto=format&fit=max&q=75&w=500www.yr.no/meteorologene/images/pigu... https://www.yr.no/meteorologene/images/pigu6bjm/production/75be3c73c087f86117e832dbcf32223d85679680-1166x660.png?auto=format&fit=max&q=75&w=500 — 200 — 39.6 KiB — 63 ms — h2https://www.yr.no/meteorologene/images/pigu6bjm/production/edb892658a38a1a3b829014dcd98c46c58c0dc31-2048x1159.jpg?auto=format&fit=max&q=75&w=500www.yr.no/meteorologene/images/pigu... https://www.yr.no/meteorologene/images/pigu6bjm/production/edb892658a38a1a3b829014dcd98c46c58c0dc31-2048x1159.jpg?auto=format&fit=max&q=75&w=500 — 200 — 5.5 KiB — 53 ms — h2https://www.yr.no/meteorologene/images/pigu6bjm/production/3573a749074341368c2ee4b5950c7d32fa724431-800x600.jpg?auto=format&fit=max&q=75&w=500www.yr.no/meteorologene/images/pigu... https://www.yr.no/meteorologene/images/pigu6bjm/production/3573a749074341368c2ee4b5950c7d32fa724431-800x600.jpg?auto=format&fit=max&q=75&w=500 — 200 — 22.8 KiB — 56 ms — h2https://gfx.nrk.no/Vo8daND8FrixhZASQ1DeDAXbLuRNUjATxBuLUbLbdtFA.jpggfx.nrk.no/Vo8daND8FrixhZASQ1DeDAXb... https://gfx.nrk.no/Vo8daND8FrixhZASQ1DeDAXbLuRNUjATxBuLUbLbdtFA.jpg — 200 — 14.5 KiB — 679 ms — h2https://gfx.nrk.no/VjIhMr_htqbL7UR2MPoHmg3Wpc_m5_pTE4GkIBvXT2rg.jpggfx.nrk.no/VjIhMr_htqbL7UR2MPoHmg3W... https://gfx.nrk.no/VjIhMr_htqbL7UR2MPoHmg3Wpc_m5_pTE4GkIBvXT2rg.jpg — 200 — 20.1 KiB — 275 ms — h2https://gfx.nrk.no/wxIOXz17NFZmJ6H9Pl5XCQo17iYeuQjHUBtVBKeQspoA.jpggfx.nrk.no/wxIOXz17NFZmJ6H9Pl5XCQo1... https://gfx.nrk.no/wxIOXz17NFZmJ6H9Pl5XCQo17iYeuQjHUBtVBKeQspoA.jpg — 200 — 23.8 KiB — 278 ms — h2https://static.nrk.no/nrk-sans/1.2.1/NRKSans_Variable.woff2static.nrk.no/nrk-sans/1.2.1/NRKSan... https://static.nrk.no/nrk-sans/1.2.1/NRKSans_Variable.woff2 — 200 — 253.4 KiB — 70 ms — h2https://www.yr.no/api/v0/serviceannouncements/web?language=nbwww.yr.no/api/v0/serviceannouncemen... https://www.yr.no/api/v0/serviceannouncements/web?language=nb — 200 — 176 B — 552 ms — h2https://www.yr.no/assets/js/4458.ee42eb8b1d1772be3654.jswww.yr.no/assets/js/4458.ee42eb8b1d... https://www.yr.no/assets/js/4458.ee42eb8b1d1772be3654.js — 200 — 11.7 KiB — 50 ms — h2
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 885 ms LCP 905 mshttps://yr.no// https://yr.no/ — 301 — 207 B — 19 ms — http/1.1https://www.yr.no/www.yr.no/ https://www.yr.no/ — 302 — 85 B — 39 ms — h2https://www.yr.no/nbwww.yr.no/nb https://www.yr.no/nb — 200 — 67.8 KiB — 328 ms — h2https://www.yr.no/assets/css/2016.b00e8390a9b6c11b0622.csswww.yr.no/assets/css/2016.b00e8390a... https://www.yr.no/assets/css/2016.b00e8390a9b6c11b0622.css — 200 — 7.3 KiB — 40 ms — h2https://www.yr.no/assets/css/index.20b4b507dd681bbfc2c2.csswww.yr.no/assets/css/index.20b4b507... https://www.yr.no/assets/css/index.20b4b507dd681bbfc2c2.css — 200 — 21.7 KiB — 44 ms — h2https://www.yr.no/assets/js/runtime~index.87b2981cc8fee64c8a60.jswww.yr.no/assets/js/runtime~index.8... https://www.yr.no/assets/js/runtime~index.87b2981cc8fee64c8a60.js — 200 — 5.9 KiB — 44 ms — h2https://www.yr.no/assets/js/index.c7821426a34a7d4e743f.jswww.yr.no/assets/js/index.c7821426a... https://www.yr.no/assets/js/index.c7821426a34a7d4e743f.js — 200 — 278.2 KiB — 102 ms — h2https://www.yr.no/assets/js/70.84ad7fec825f97438759.jswww.yr.no/assets/js/70.84ad7fec825f... https://www.yr.no/assets/js/70.84ad7fec825f97438759.js — 200 — 7.3 KiB — 92 ms — h2https://www.yr.no/assets/js/7040.439fd46c3a70b3281c5c.jswww.yr.no/assets/js/7040.439fd46c3a... https://www.yr.no/assets/js/7040.439fd46c3a70b3281c5c.js — 200 — 5.7 KiB — 93 ms — h2https://www.yr.no/assets/js/9078.005fd57057ab6d18f4d7.jswww.yr.no/assets/js/9078.005fd57057... https://www.yr.no/assets/js/9078.005fd57057ab6d18f4d7.js — 200 — 7.5 KiB — 94 ms — h2https://www.yr.no/assets/js/pages-home-HomePage.795136c3d3cdeebe2006.jswww.yr.no/assets/js/pages-home-Home... https://www.yr.no/assets/js/pages-home-HomePage.795136c3d3cdeebe2006.js — 200 — 8.6 KiB — 97 ms — h2https://www.yr.no/assets/manifest-nb.jsonwww.yr.no/assets/manifest-nb.json https://www.yr.no/assets/manifest-nb.json — 200 — 1.6 KiB — 63 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 944ms · 346KB · kr116/mo
www.yr.no
Other
Costly
Execution 492ms
Transfer 278 KB
Unused 55%
Monthly Cost kr61/mo
Unattributable
Other
Costly
Execution 253ms
Transfer 0 KB
Monthly Cost kr31/mo
www.yr.no
Other
Optional
Execution 200ms
Transfer 68 KB
Monthly Cost kr25/mo

These scripts may cost more than they're worth

  • www.yr.no adds 492ms and costs ~kr61/month
  • Unattributable adds 253ms and costs ~kr31/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

www.yr.no takes 492ms 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

55% of www.yr.no's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Unattributable takes 253ms 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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