Performance
· 15 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.
713 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.24 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.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
961 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.
1.24 s
Page Load Progression
FPage Weight BudgetAction5.0 MB transferred, 117 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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction117 resources · 5.0 MB · 73 KB savings availableFIX
~73.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 117 resources | 5.0 MiB | ||||||
BJS Execution Cost735ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 303ms | 68ms | 0ms | 3rd |
| https://www.ikea.com/ | 236ms | 8ms | 0ms | 3rd |
| https://www.ikea.com/global/en/_astro/template.BcmpHS5G.js | 138ms | 110ms | 0ms | 3rd |
| https://www.ikea.com/global/en/esi/header/_astro/template.Bnl_uFrw.js | 58ms | 34ms | 0ms | 3rd |
BJS Bundles65 scripts, 73 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.cookielaw.org/scripttemplates/202508.2.0/otBannerSdk.js | 121 KB | 73 KB (61%) | ✓ | 3rd |
| https://www.ikea.com/global/en/esi/common/_astro/FragmentCommon.astro_astro_type_script_index_0_lang.Cnnml7II.js | 9 KB | — | ✓ | 3rd |
| https://www.ikea.com/global/en/esi/header/_astro/extractFromInline.07e95cbd.js | 2 KB | — | ✓ | 3rd |
| https://www.ikea.com/global/en/esi/footer/_astro/extractFromInline.114abd88.js | 2 KB | — | ✓ | 3rd |
| https://www.ikea.com/global/en/_astro/extractFromInline.07e95cbd.js | 2 KB | — | ✓ | 3rd |
| https://www.ikea.com/global/en/esi/common/initOnetrust-9e5afaab.js | 2 KB | — | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/otSDKStub.js | 9 KB | — | ✓ | 3rd |
| https://www.ikea.com/global/en/shared-data/regions.js | 4 KB | — | ✓ | 3rd |
| https://www.ikea.com/global/en/esi/common/_astro/runtime.BfvfjF8n.js | 7 KB | — | ✓ | 3rd |
| https://www.ikea.com/global/en/esi/header/_astro/Header.BIyzStXR.js | 2 KB | — | ✓ | 3rd |
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
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization22 images, 0 KB saveablePASS
A+Font Loading2 fonts (23 KB)PASS
Web fonts
2
23 KB total
Render-blocking
0
of 2
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 HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
AHTTP Cachingmax-age=3600 (1 hour)PASS
max-age=3600
| Directive | Value | Meaning |
|---|---|---|
| max-age | 3600 | Cache for 1 hour |
Network Waterfall117 requests over 1245msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 303ms | 0 KB | — | €5/mo | Costly |
www.ikea.com www.ikea.com | Other | 236ms | 190 KB | — | €4/mo | Costly |
www.ikea.com www.ikea.com | Other | 138ms | 10 KB | — | €2/mo | Optional |
www.ikea.com www.ikea.com | Other | 58ms | 10 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 303ms and costs ~€5/month
- www.ikea.com adds 236ms and costs ~€4/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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 303ms 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
www.ikea.com takes 236ms 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