Performance
· 22 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.
744 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.63 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.
0.014
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.78 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.
1.73 s
Page Load Progression
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BJS Bundles23 scripts, 148 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-7F5KRBT07Y | 160 KB | 69 KB (43%) | ✓ | 3rd |
| https://gst-recon.com/main-J5EHXBM3.js | 119 KB | 37 KB (31%) | ✓ | 1st |
| https://gst-recon.com/chunk-VDWEWXQ7.js | 29 KB | 21 KB (73%) | ✓ | 1st |
| https://gst-recon.com/chunk-35DTMPFY.js | 53 KB | 20 KB (38%) | ✓ | 1st |
| https://gst-recon.com/chunk-ZVRPNGVC.js | 1 KB | — | ✓ | 1st |
| https://gst-recon.com/chunk-2J4ZIVJY.js | 1 KB | — | ✓ | 1st |
| https://gst-recon.com/chunk-IBSCHJSJ.js | 1 KB | — | ✓ | 1st |
| https://gst-recon.com/chunk-JVEYNH6V.js | 1 KB | — | ✓ | 1st |
| https://gst-recon.com/chunk-7Y2YVMO3.js | 1 KB | — | ✓ | 1st |
| https://gst-recon.com/chunk-YQB2XRXQ.js | 6 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
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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CDocument CompressionActionDocument response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Page Weight Budget521 KB transferred, 31 requestsPASS
AThird-Party Impact31% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Image OptimizationNo images on this pagePASS
A+JS Execution Cost339ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://gst-recon.com/chunk-NTLJMCA7.js | 104ms | 100ms | 0ms | 1st |
| https://gst-recon.com/ | 87ms | 3ms | 1ms | 1st |
| Unattributable | 82ms | 29ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-7F5KRBT07Y | 66ms | 55ms | 10ms | 3rd |
A+Font LoadingNo web fonts (system fonts)PASS
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Page Weight Inventory31 resources · 521 KB · 148 KB savings availablePASS
~147.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 31 resources | 521.4 KiB | ||||||
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall31 requests over 1493msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 66ms | 160 KB | 43% | $1/mo | Optional |