Performance
· 27 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.
3.14 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.62 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.78 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.03 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.
6.51 s
Page Load Progression
DThird-Party ImpactAction68% third-party, 0 ms blockingFIX
FJS Execution CostAction9838ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.gstatic.com/firebasejs/10.14.1/firebase-firestore-compat.js | 7571ms | 6108ms | 91ms | 3rd |
| Unattributable | 1662ms | 959ms | 0ms | 1st |
| https://mohammed0912474-source.github.io/qa-supply-chain-app/ | 479ms | 70ms | 3ms | 1st |
| https://mohammed0912474-source.github.io/qa-supply-chain-app/app-part4.js | 70ms | 42ms | 18ms | 1st |
| https://mohammed0912474-source.github.io/qa-supply-chain-app/app-part1.js | 56ms | 11ms | 34ms | 1st |
BJS Bundles12 scripts, 113 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/firebasejs/10.14.1/firebase-firestore-compat.js | 100 KB | 56 KB (57%) | ✓ | 3rd |
| https://www.gstatic.com/firebasejs/10.14.1/firebase-firestore-compat.js | 0 KB | 56 KB (57%) | ✓ | 3rd |
| https://www.gstatic.com/firebasejs/10.14.1/firebase-app-compat.js | 10 KB | — | ✓ | 3rd |
| https://mohammed0912474-source.github.io/qa-supply-chain-app/app-part1.js | 20 KB | — | ✗ | 1st |
| https://mohammed0912474-source.github.io/qa-supply-chain-app/app-part2.js | 17 KB | — | ✓ | 1st |
| https://mohammed0912474-source.github.io/qa-supply-chain-app/app-part3.js | 13 KB | — | ✓ | 1st |
| https://mohammed0912474-source.github.io/qa-supply-chain-app/app-part4.js | 7 KB | — | ✓ | 1st |
| https://www.gstatic.com/firebasejs/10.14.1/firebase-app-compat.js | 0 KB | — | ✓ | 3rd |
| https://mohammed0912474-source.github.io/qa-supply-chain-app/app-part1.js | 0 KB | — | ✗ | 1st |
| https://mohammed0912474-source.github.io/qa-supply-chain-app/app-part2.js | 0 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BDocument CompressionDocument response uses gzip; brotli would be ~20% smallerREVIEW
BMain HTML Cache-ControlMain HTML max-age=600 (~10min)REVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
A+Page Weight Budget515 KB transferred, 34 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization3 images, 0 KB saveablePASS
A+Font Loading4 fonts (63 KB)PASS
Web fonts
4
63 KB total
Render-blocking
0
of 4
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 Hints6 hints, 0 missing preconnectsPASS
Current Resource Hints
6 resource hints configured
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
APage Weight Inventory34 resources · 515 KB · 113 KB savings availablePASS
~112.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 34 resources | 515.2 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Fastly
A+HTTP Cachingmax-age=600 (10 minutes)PASS
max-age=600
| Directive | Value | Meaning |
|---|---|---|
| max-age | 600 | Cache for 10 minutes |
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall34 requests over 3066msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.gstatic.com www.gstatic.com | Other | 7571ms | 0 KB | 57% | $100/mo | Costly |
These scripts may cost more than they're worth
- www.gstatic.com adds 7571ms and costs ~$100/month
77% 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.gstatic.com takes 7571ms 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
57% of www.gstatic.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
Image Optimization2 images, 113 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
2
Total Size
113 KB