https://productshotai.app
Performance
· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
90
GRADE
A
FIX
2
REVIEW
3
PASS
18
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
55
96
73
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
2.04 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.33 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.44 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.007
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.83 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.
8.83 s
Page Load Progression
826 ms 1.7 s
2.5 s
3.3 s 4.1 s
5.0 s
5.8 s
6.6 sChecks
2618 PASS 3 REVIEW 2 FIX
FJS Execution CostAction10245ms total JS executionFIX
JS Execution Cost
Action10245ms total JS execution
10245ms total JS execution
Warning::
https://productshotai.app/: 3811ms CPU time
Warning::
https://productshotai.app/_next/static/chunks/4bd1...: 1920ms CPU time
Warning::
https://productshotai.app/_next/static/chunks/1274...: 1209ms CPU time
Warning::
https://productshotai.app/_next/static/chunks/1255...: 879ms CPU time
Warning::
Unattributable: 839ms CPU time
Info::
Third-party scripts: 726ms (7% of total)
Main Thread Breakdown
Other 34% Script Evaluation 27% Style & Layout 22% Rendering 11% Script Parsing & Compilation 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://productshotai.app/ | 3811ms | 147ms | 53ms | 1st |
| https://productshotai.app/_next/static/chunks/4bd1b696-f785427dddbba9fb.js | 1920ms | 209ms | 25ms | 1st |
| https://productshotai.app/_next/static/chunks/1274-9f866282c24598b3.js | 1209ms | 115ms | 10ms | 1st |
| https://productshotai.app/_next/static/chunks/1255-32f0b2a4c4d3a714.js | 879ms | 802ms | 27ms | 1st |
| Unattributable | 839ms | 119ms | 0ms | 1st |
| https://productshotai.app/cdn-cgi/challenge-platform/scripts/jsd/main.js | 429ms | 409ms | 3ms | 1st |
| https://scripts.clarity.ms/0.8.69/clarity.js | 369ms | 276ms | 10ms | 3rd |
| https://productshotai.app/_next/static/chunks/webpack-87099ceb4a46d92a.js | 241ms | 237ms | 3ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-EB61P8TMB1 | 227ms | 122ms | 104ms | 3rd |
| https://productshotai.app/_next/static/chunks/app/%5Blocale%5D/layout-7c11b694dcd38811.js | 191ms | 182ms | 5ms | 1st |
Showing top 10 of 12 scripts
DHTTP CachingActionno-store (uncacheable)FIX
HTTP Caching
Actionno-store (uncacheable)
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, no-cache, no-store, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
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 |
BThird-Party Impact43% third-party, 0 ms blockingREVIEW
Third-Party Impact
43% third-party, 0 ms blocking
43% third-party, 0 ms blocking
Info::
Third-party code accounts for 43% of page weight (416.3 KiB of 962.0 KiB)
Info::
Third-party blocking time is low (0 ms)
57%
43%
First-party Third-party
CJS BundlesAction26 scripts, 192 KB unusedREVIEW
JS Bundles
Action26 scripts, 192 KB unused
26 scripts, 192 KB unused
Warning::
https://accounts.google.com/gsi/client: 73 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-EB61...: 69 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://umami.bestvid.net/recorder.js: 51 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 192 KB
192 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://accounts.google.com/gsi/client | 97 KB | 73 KB (75%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-EB61P8TMB1 | 168 KB | 69 KB (41%) | ✓ | 3rd |
| https://umami.bestvid.net/recorder.js | 58 KB | 51 KB (88%) | ✓ | 3rd |
| https://productshotai.app/_next/static/chunks/1839-c98fe4086448e41f.js | 5 KB | — | ✓ | 1st |
| https://productshotai.app/_next/static/chunks/373-f60d03bb8d602460.js | 5 KB | — | ✓ | 1st |
| https://productshotai.app/_next/static/chunks/4bd1b696-f785427dddbba9fb.js | 54 KB | — | ✓ | 1st |
| https://productshotai.app/_next/static/chunks/1255-32f0b2a4c4d3a714.js | 44 KB | — | ✓ | 1st |
| https://productshotai.app/_next/static/chunks/main-app-3f1cb8baf2b06fbe.js | 1 KB | — | ✓ | 1st |
| https://productshotai.app/_next/static/chunks/6091-30a78ac1d17f693e.js | 13 KB | — | ✓ | 1st |
| https://productshotai.app/_next/static/chunks/176-c399f18851485fd7.js | 4 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
Why this matters
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.
Why this matters
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.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
JavaScript Blocking
2 JS blocking issue(s) detected
2 JS blocking issue(s) detected
Warning::
1 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
Total JS execution time is 10.2 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
APage Weight Budget962 KB transferred, 76 requestsPASS
Page Weight Budget
962 KB transferred, 76 requests
962 KB transferred, 76 requests
Info::
Page weighs 2.8 MB (962 KB transferred)
Warning::
JavaScript is 587 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 587 KB
Info::
76 HTTP requests
Info::
Estimated 0.20 g CO2 per page load
962 KB transferred
76 requests
0.20 g CO2 per page load
JavaScript 587.2 KiB 61%
Images 208.8 KiB 22%
Fonts 74.4 KiB 8%
HTML 45.9 KiB 5%
Other 35.6 KiB 4%
Other 5.9 KiB 1%
Other 1.8 KiB 0%
CSS 1.5 KiB 0%
Other 823 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Why this matters
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
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Image Optimization26 images, 0 KB saveablePASS
Image Optimization
26 images, 0 KB saveable
26 images, 0 KB saveable
Info::
All images are well-optimized
26 images 209 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+Font Loading2 fonts (74 KB)PASS
Font Loading
2 fonts (74 KB)
2 fonts (74 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
74 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
313510e2713fb214-s.p.woff2 woff2 swap
Size 34 KB
Load time 188 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
bb3ef058b751a6ad-s.p.woff2 woff2 swap
Size 40 KB
Load time 154 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
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
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource Hints9 hints, 0 missing preconnectsPASS
Resource Hints
9 hints, 0 missing preconnects
9 hints, 0 missing preconnects
Info::
Page uses 9 resource hint(s)
Current Resource Hints
preconnect—
preload 9
dns-prefetch—
prefetch—
9 resource hints configured
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+Compression AlgorithmMain response uses brotliPASS
Compression Algorithm
Main response uses brotli
Main response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: private, no-cache, no-store, max-age=0, must-revalidate
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
Server-Timing Observability
3 Server-Timing entries advertised
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
APage Weight Inventory76 resources · 962 KB · 192 KB savings availablePASS
Page Weight Inventory
76 resources · 962 KB · 192 KB savings available
76 resources · 962 KB · 192 KB savings available
Info::
Within 1MB page-weight target
Got: 962 KB
Info::
~192 KB of savings available
Warning::
29 third-party resources (43% of weight)
76 resources · 962.0 KiB · 29 third-party Within 1MB page-weight target
JavaScript 61% · 587.2 KiB
Image 25% · 243.0 KiB
Font 8% · 74.4 KiB
Document 5% · 45.9 KiB
Other 1% · 9.9 KiB
CSS 0% · 1.5 KiB
~192.1 KiB of savings available
Remove unused JavaScript: 192.1 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 76 resources | 962.0 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
Render-Blocking Resources
No render-blocking resources detected
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+Third-Party ResourcesNo third-party resources detectedPASS
Third-Party Resources
No third-party resources detected
No third-party resources detected
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
CSS Performance Depth
No CSS performance depth issues detected
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall76 requests over 6336msINFO
Network Waterfall
76 requests over 6336ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
7% of JavaScript execution is third-party
First-party Third-party 726ms · 348KB · €4/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Microsoft Clarity scripts.clarity.ms | Session Replay | 369ms | 25 KB | — | €2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 227ms | 168 KB | 41% | €1/mo | Costly |
accounts.google.com accounts.google.com | Other | 68ms | 97 KB | 75% | €0/mo | Optional |
umami.bestvid.net umami.bestvid.net | Other | 61ms | 58 KB | 88% | €0/mo | Optional |
Microsoft Clarity
Session Replay
Execution 369ms
Transfer 25 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Execution 227ms
Transfer 168 KB
Unused 41%
Monthly Cost €1/mo
accounts.google.com
Other
Execution 68ms
Transfer 97 KB
Unused 75%
Monthly Cost €0/mo
umami.bestvid.net
Other
Execution 61ms
Transfer 58 KB
Unused 88%
Monthly Cost €0/mo
These scripts may cost more than they're worth
- Microsoft Clarity adds 369ms and costs ~€2/month
- Google Tag Manager adds 227ms and costs ~€1/month
Microsoft Clarity takes 369ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 227ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
75% of accounts.google.com's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
88% of umami.bestvid.net's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Image Optimization119 images, 1281 KB total, 467 KB wastedINFO
Image Optimization
119 images, 1281 KB total, 467 KB wasted
Image Optimization Audit
Total Images
119
Total Size
1281 KB
Oversized
29
Wasted
467 KB
68 missing dimensions 16 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.