Performance
· 14 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.
1.05 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.27 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
75 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.225
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.62 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.
4.61 s
Page Load Progression
FPage Weight BudgetAction4.2 MB transferred, 134 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 ImpactAction87% third-party, 0 ms blockingFIX
FJS BundlesAction49 scripts, 1.4 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://central.sonatype.com/_next/static/chunks/8a1b799380a42a65.js | 420 KB | 419 KB (100%) | ✓ | 3rd |
| https://central.sonatype.com/_next/static/chunks/d5a7727462d482f9.js | 325 KB | 324 KB (100%) | ✓ | 3rd |
| https://central.sonatype.com/_next/static/chunks/e74bc7b807f472d5.js | 325 KB | 221 KB (68%) | ✓ | 3rd |
| https://static.zdassets.com/web_widget/classic/latest/web-widget-main-22a6ed7.js | 261 KB | 113 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-JP8E7HP4Q6&cx=c>m=4e64k1h2 | 153 KB | 107 KB (70%) | ✓ | 3rd |
| https://central.sonatype.com/_next/static/chunks/266aff81c34c52d8.js | 78 KB | 77 KB (100%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=G-JP8E7HP4Q6&cx=c>m=4e64k1h2 | 154 KB | 64 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PMGC3JR6>m_auth=>m_preview=>m_cookies_win=x | 150 KB | 61 KB (41%) | ✓ | 3rd |
| https://central.sonatype.com/_next/static/chunks/a56342ba7750290f.js | 78 KB | 42 KB (55%) | ✓ | 3rd |
| https://central.sonatype.com/_next/static/chunks/c1e46bf1da7ac198.js | 69 KB | 24 KB (35%) | ✓ | 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
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
FPage Weight InventoryAction134 resources · 4.2 MB · 1.4 MB savings availableFIX
~1.4 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 134 resources | 4.2 MiB | ||||||
DHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization15 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+JS Execution CostNo JS execution dataPASS
A+Font Loading6 fonts (215 KB)PASS
Web fonts
6
215 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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
- Convert to woff2 for ~30% smaller file size
- 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 ~90 KB and ~180 ms