Performance
· 17 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.
3.99 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.68 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.81 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.035
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.86 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.
22.09 s
Page Load Progression
494 ms
987 ms
1.5 s
2.0 s 2.5 s 3.0 s
3.5 s
3.9 sFPage Weight BudgetAction3.5 MB transferred, 95 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
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction6482ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.opencart.com/application/view/javascript/agentfy-client-latest.umd.js?t=20260422 | 1308ms | 760ms | 507ms | 3rd |
| https://www.opencart.com/application/view/javascript/agentfy.js?t=20260422 | 829ms | 804ms | 1ms | 3rd |
| https://www.opencart.com/ | 805ms | 55ms | 7ms | 3rd |
| Unattributable | 738ms | 19ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-10797860975 | 409ms | 339ms | 67ms | 3rd |
| https://www.opencart.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 397ms | 377ms | 4ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-X8G0BRFSDF&cx=c>m=4e64h1 | 388ms | 313ms | 71ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-1988725-3 | 367ms | 270ms | 79ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-CY855R5Z98&cx=c>m=4e64h1 | 258ms | 190ms | 66ms | 3rd |
| https://www.paypal.com/sdk/js?client-id=Aah3N-pqgdc5eLwdDCg_hWrLUt3FEFuNQ399H2owlt6RIMm1m8tRqCfnzgpuydaaNslRbYQJORcSfUmh | 227ms | 157ms | 62ms | 3rd |
Showing top 10 of 17 scripts
FJS BundlesAction29 scripts, 715 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.opencart.com/application/view/javascript/agentfy-client-latest.umd.js?t=20260422 | 737 KB | 163 KB (22%) | ✗ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-10797860975&cx=c>m=4e64h1 | 145 KB | 106 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-CY855R5Z98&cx=c>m=4e64h1 | 149 KB | 79 KB (53%) | ✓ | 3rd |
| https://www.paypal.com/sdk/js?client-id=Aah3N-pqgdc5eLwdDCg_hWrLUt3FEFuNQ399H2owlt6RIMm1m8tRqCfnzgpuydaaNslRbYQJORcSfUmh | 97 KB | 66 KB (69%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-1988725-1&cx=c>m=4e64h1 | 125 KB | 64 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-X8G0BRFSDF&cx=c>m=4e64h1 | 149 KB | 61 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-10797860975 | 145 KB | 54 KB (38%) | ✓ | 3rd |
| https://connect.facebook.net/en_GB/bundle/sdk.js/ | 78 KB | 54 KB (70%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-1988725-3 | 125 KB | 45 KB (53%) | ✓ | 3rd |
| https://www.opencart.com/application/view/javascript/jquery/jquery-1.12.2.min.js | 34 KB | 22 KB (65%) | ✓ | 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 InventoryAction95 resources · 3.5 MB · 715 KB savings availableFIX
~715.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 95 resources | 3.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction41 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (204 KB)PASS
Web fonts
3
204 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- 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
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 ~98 KB and ~196 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall95 requests over 3215msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.opencart.com www.opencart.com | Other | 1308ms | 737 KB | 22% | $17/mo | Costly |
www.opencart.com www.opencart.com | Other | 829ms | 1 KB | — | $11/mo | Costly |
www.opencart.com www.opencart.com | Other | 805ms | 7 KB | — | $11/mo | Costly |
Unattributable Unattributable | Other | 738ms | 0 KB | — | $10/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 409ms | 145 KB | 38% | $5/mo | Costly |
www.opencart.com www.opencart.com | Other | 397ms | 0 KB | — | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 388ms | 149 KB | 41% | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 367ms | 125 KB | 53% | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 258ms | 149 KB | 53% | $3/mo | Costly |
PayPal www.paypal.com | Payment | 227ms | 97 KB | 69% | $3/mo | Essential |
Google Tag Manager www.googletagmanager.com | Tag Manager | 225ms | 125 KB | 51% | $3/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 148ms | 78 KB | 70% | $2/mo | Optional |
www.opencart.com www.opencart.com | Other | 98ms | 34 KB | 65% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 94ms | 145 KB | 73% | $1/mo | Optional |
cdnjs cdnjs.cloudflare.com | CDN | 67ms | 41 KB | — | $1/mo | Optional |
Google Analytics www.google-analytics.com | Analytics | 64ms | 21 KB | — | $1/mo | Optional |
cdnjs cdnjs.cloudflare.com | CDN | 59ms | 45 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- www.opencart.com adds 1308ms and costs ~$17/month
- www.opencart.com adds 829ms and costs ~$11/month
- www.opencart.com adds 805ms and costs ~$11/month
- Unattributable adds 738ms and costs ~$10/month
- Google Tag Manager adds 409ms and costs ~$5/month
- www.opencart.com adds 397ms and costs ~$5/month
- Google Tag Manager adds 388ms and costs ~$5/month
- Google Tag Manager adds 367ms and costs ~$5/month
- Google Tag Manager adds 258ms and costs ~$3/month
- Google Tag Manager adds 225ms and costs ~$3/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
www.opencart.com takes 1308ms 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
www.opencart.com takes 829ms 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
www.opencart.com takes 805ms 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
Unattributable takes 738ms 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
Google Tag Manager takes 409ms 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
www.opencart.com takes 397ms 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
Google Tag Manager takes 388ms 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
Google Tag Manager takes 367ms 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
53% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 258ms 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
53% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
69% of PayPal's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 225ms 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
51% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
70% of Facebook Pixel's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
65% of www.opencart.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
73% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev