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.
1.59 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.49 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
633 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.045
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.57 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.
6.93 s
Page Load Progression
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BThird-Party Impact45% third-party, 0 ms blockingREVIEW
CJS Execution CostAction1843ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://gst-recon.com/chunk-NTLJMCA7.js | 519ms | 504ms | 1ms | 1st |
| Unattributable | 400ms | 94ms | 0ms | 1st |
| https://gst-recon.com/ | 393ms | 21ms | 3ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-7F5KRBT07Y | 269ms | 225ms | 40ms | 3rd |
| https://gst-recon.com/polyfills-B6TNHZQ6.js | 162ms | 144ms | 0ms | 1st |
| https://apis.google.com/_/scs/abc-static/_/js/k=gapi.lb.en.etOqPKhAhvg.O/m=gapi_iframes/rt=j/sv=1/d=1/ed=1/rs=AHpOoo-l5JrVgGKVELwC844E6riBHX86-w/cb=gapi.loaded_0?le=scs | 100ms | 88ms | 10ms | 3rd |
BJS Bundles26 scripts, 128 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 | 70 KB (44%) | ✓ | 3rd |
| https://gst-recon.com/main-J5EHXBM3.js | 119 KB | 37 KB (31%) | ✓ | 1st |
| https://gst-recon.com/chunk-35DTMPFY.js | 53 KB | 20 KB (38%) | ✓ | 1st |
| https://gst-recon.com/chunk-IBSCHJSJ.js | 1 KB | — | ✓ | 1st |
| https://gst-recon.com/chunk-WRWXI3SN.js | 1 KB | — | ✓ | 1st |
| https://gst-recon.com/chunk-ZVRPNGVC.js | 1 KB | — | ✓ | 1st |
| https://gst-recon.com/chunk-FN7UTOOT.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
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 Budget657 KB transferred, 37 requestsPASS
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
A+Text CompressionAll text resources are compressedPASS
A+Image OptimizationNo images on this pagePASS
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
APage Weight Inventory37 resources · 657 KB · 128 KB savings availablePASS
~127.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 37 resources | 656.5 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+JavaScript BlockingNo render-blocking JS or document.write usage detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall37 requests over 3162msINFO
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 | 269ms | 160 KB | 44% | $5/mo | Costly |
apis.google.com apis.google.com | Other | 100ms | 35 KB | — | $2/mo | Optional |
These scripts may cost more than they're worth
- Google Tag Manager adds 269ms and costs ~$5/month
Google Tag Manager takes 269ms 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