Performance
· 15 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.
395 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
654 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
142 ms
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.
1.21 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.
1.24 s
Page Load Progression
DHTTP CachingActionno-store (uncacheable)FIX
private, no-cache, no-store, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
BJS Execution Cost802ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://shotprep.io/_next/static/chunks/10~x95jhs6ns3.js | 299ms | 254ms | 11ms | 1st |
| https://shotprep.io/_next/static/chunks/0pfzsr1~bc4a2.js | 174ms | 156ms | 11ms | 1st |
| https://shotprep.io/_next/static/chunks/0kt_.0j901zal.js | 119ms | 107ms | 6ms | 1st |
| https://shotprep.io/ | 114ms | 4ms | 3ms | 1st |
| Unattributable | 96ms | 7ms | 0ms | 3rd |
BJS Bundles16 scripts, 110 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://shotprep.io/_next/static/chunks/0pfzsr1~bc4a2.js | 63 KB | 32 KB (52%) | ✓ | 1st |
| https://shotprep.io/_next/static/chunks/10~x95jhs6ns3.js | 71 KB | 27 KB (39%) | ✓ | 1st |
| https://us-assets.i.posthog.com/static/surveys.js?v=1.369.2 | 32 KB | 25 KB (80%) | ✓ | 3rd |
| https://us-assets.i.posthog.com/static/posthog-recorder.js?v=1.369.2 | 51 KB | 25 KB (48%) | ✓ | 3rd |
| https://shotprep.io/_next/static/chunks/0c~156nc_i3ig.js | 13 KB | — | ✓ | 1st |
| https://shotprep.io/_next/static/chunks/turbopack-00~wptou1ihkb.js | 5 KB | — | ✓ | 1st |
| https://shotprep.io/_next/static/chunks/054gu1sohjwr6.js | 2 KB | — | ✓ | 1st |
| https://shotprep.io/_next/static/chunks/0sl_nocd_j~un.js | 10 KB | — | ✓ | 1st |
| https://shotprep.io/_next/static/chunks/0yb2wil16uz6h.js | 2 KB | — | ✓ | 1st |
| https://shotprep.io/_next/static/chunks/0n.kggqhk7wie.js | 11 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Page Weight Budget453 KB transferred, 32 requestsPASS
A+Third-Party Impact18% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization2 images, 0 KB saveablePASS
A+Font Loading1 fonts (48 KB)PASS
Web fonts
1
48 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+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Page Weight Inventory32 resources · 453 KB · 110 KB savings availablePASS
~109.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 32 resources | 453.3 KiB | ||||||
Network Waterfall32 requests over 2027msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 96ms | 0 KB | — | $1/mo | Optional |