Performance
· 26 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.
1.35 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.35 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
48 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.039
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.96 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.
1.49 s
Page Load Progression
FPage Weight BudgetAction3.0 MB transferred, 94 requestsFIX
DThird-Party ImpactAction84% third-party, 0 ms blockingFIX
FJS Execution CostAction7973ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://fimmer.com/ | 4728ms | 88ms | 3ms | 1st |
| Unattributable | 2512ms | 768ms | 0ms | 1st |
| https://fimmer.com/_astro/popup-feature.astro_astro_type_script_index_0_lang.Crg9eYhy.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 733ms | 686ms | 0ms | 1st |
DPage Weight InventoryAction94 resources · 3.0 MB · 50 KB savings availableFIX
~49.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 94 resources | 3.0 MiB | ||||||
CImage OptimizationAction61 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingpublic, max-age=0, must-revalidateREVIEW
public, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading1 fonts (29 KB)PASS
Web fonts
1
29 KB total
Render-blocking
0
of 1
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+JS Bundles15 scripts, 50 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://fimmer.com/_astro/functions.ggQ-D7Q0.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 61 KB | 50 KB (82%) | ✓ | 1st |
| https://fimmer.com/_astro/popup-contact.astro_astro_type_script_index_0_lang.B0dduWy9.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 1 KB | — | ✓ | 1st |
| https://fimmer.com/_astro/popup-controller.UHKbQxyR.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 1 KB | — | ✓ | 1st |
| https://fimmer.com/_astro/popup-search.astro_astro_type_script_index_0_lang.CjXb1VfU.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 3 KB | — | ✓ | 1st |
| https://fimmer.com/_astro/popup-disclaimer.astro_astro_type_script_index_0_lang.Buq-RyI8.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 1 KB | — | ✓ | 1st |
| https://fimmer.com/_astro/body.astro_astro_type_script_index_0_lang.D793C1i7.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 0 KB | — | ✓ | 1st |
| https://fimmer.com/_astro/index.astro_astro_type_script_index_0_lang.D79OgKwo.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 7 KB | — | ✓ | 1st |
| https://fimmer.com/37ed7292e04a8dd7/script.js | 2 KB | — | ✓ | 1st |
| https://fimmer.com/_astro/navigation.astro_astro_type_script_index_0_lang.CGtgzcxE.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 2 KB | — | ✓ | 1st |
| https://fimmer.com/_astro/popup-feature.astro_astro_type_script_index_0_lang.Crg9eYhy.js?dpl=dpl_CsARqymNvwahKh9fqskxHo43KTzW | 2 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
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Document CompressionDocument response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML max-age=0 (≤ 5min) is appropriatePASS
AServer Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall94 requests over 4328msINFO
Image Optimization70 images, 588 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
70
Total Size
588 KB
Oversized
50