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.
4.65 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
16.13 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.02 s
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.
8.26 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.
16.28 s
Page Load Progression
DPage Weight BudgetAction2.2 MB transferred, 103 requestsFIX
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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
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
FJS Execution CostAction3847ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.gminsights.com/ | 957ms | 60ms | 3ms | 3rd |
| https://www.gminsights.com/_next/static/chunks/framework-01be286159f12911.js | 657ms | 375ms | 18ms | 3rd |
| Unattributable | 519ms | 10ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-F01HGT5N4X&cx=c>m=4e64k1 | 449ms | 332ms | 50ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TKV3WHJ | 308ms | 256ms | 48ms | 3rd |
| https://www.gminsights.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 284ms | 265ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-730798613&cx=c>m=4e64k1 | 256ms | 219ms | 36ms | 3rd |
| https://www.gminsights.com/_next/static/chunks/pages/index-dbbf8a235fba3658.js | 187ms | 187ms | 0ms | 3rd |
| https://www.gminsights.com/_next/static/chunks/2266-107a2dca37360e35.js | 154ms | 1ms | 152ms | 3rd |
| https://www.gminsights.com/_next/static/css/a6b884ee55a2c17e.css | 75ms | 0ms | 0ms | 3rd |
DPage Weight InventoryAction103 resources · 2.2 MB · 224 KB savings availableFIX
~224.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 103 resources | 2.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction38 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
CJS BundlesAction39 scripts, 224 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-TKV3WHJ | 149 KB | 65 KB (44%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-F01HGT5N4X&cx=c>m=4e64k1 | 175 KB | 64 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-730798613&cx=c>m=4e64k1 | 144 KB | 63 KB (43%) | ✓ | 3rd |
| https://www.gminsights.com/_next/static/chunks/framework-01be286159f12911.js | 65 KB | 33 KB (51%) | ✓ | 3rd |
| https://www.gminsights.com/_next/static/chunks/ebc70433-cfdb10c2d7525b4c.js | 1 KB | — | ✓ | 3rd |
| https://www.gminsights.com/_next/static/chunks/1664-b352f27ba681e99a.js | 2 KB | — | ✓ | 3rd |
| https://www.gminsights.com/_next/static/chunks/4668.10156d01378bbb2c.js | 1 KB | — | ✓ | 3rd |
| https://www.gminsights.com/_next/static/chunks/2067.cf8419d6756dd5df.js | 3 KB | — | ✓ | 3rd |
| https://www.gminsights.com/_next/static/chunks/3505.47b6c0063828855a.js | 1 KB | — | ✓ | 3rd |
| https://www.gminsights.com/_next/static/chunks/6133.957fa63a98725697.js | 1 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
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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading10 fonts (387 KB)PASS
Web fonts
10
387 KB total
Render-blocking
0
of 10
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
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 ~141 KB and ~282 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints11 hints, 0 missing preconnectsPASS
Current Resource Hints
11 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall103 requests over 1895msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.gminsights.com www.gminsights.com | Other | 957ms | 38 KB | — | €15/mo | Costly |
www.gminsights.com www.gminsights.com | Other | 657ms | 65 KB | 51% | €11/mo | Costly |
Unattributable Unattributable | Other | 519ms | 0 KB | — | €8/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 449ms | 175 KB | 37% | €7/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 308ms | 149 KB | 44% | €5/mo | Costly |
www.gminsights.com www.gminsights.com | Other | 284ms | 0 KB | — | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 256ms | 144 KB | 43% | €4/mo | Costly |
www.gminsights.com www.gminsights.com | Other | 187ms | 1 KB | — | €3/mo | Optional |
www.gminsights.com www.gminsights.com | Other | 154ms | 491 KB | — | €2/mo | Optional |
www.gminsights.com www.gminsights.com | Other | 75ms | 147 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.gminsights.com adds 957ms and costs ~€15/month
- www.gminsights.com adds 657ms and costs ~€11/month
- Unattributable adds 519ms and costs ~€8/month
- Google Tag Manager adds 449ms and costs ~€7/month
- Google Tag Manager adds 308ms and costs ~€5/month
- www.gminsights.com adds 284ms and costs ~€5/month
- Google Tag Manager adds 256ms 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
www.gminsights.com takes 957ms 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.gminsights.com takes 657ms 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
51% of www.gminsights.com'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
Unattributable takes 519ms 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 449ms 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 308ms 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.gminsights.com takes 284ms 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 256ms 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