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.
2.89 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.96 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
373 ms
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.
2.94 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.
3.96 s
Page Load Progression
386 ms
773 ms 1.2 s
1.5 s
1.9 s 2.3 s
2.7 s
3.1 sFPage Weight BudgetAction4.4 MB transferred, 313 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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2611ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://chatgpt.com/cdn/assets/2340486e-odcog1ngty5j2ajp.js | 1249ms | 1089ms | 1ms | 3rd |
| Unattributable | 469ms | 63ms | 0ms | 3rd |
| https://chatgpt.com/ | 440ms | 52ms | 3ms | 3rd |
| https://chatgpt.com/cdn/assets/1a7ebd5f-cd95disc6crjb2tf.js | 215ms | 197ms | 4ms | 3rd |
| https://chatgpt.com/cdn/assets/4813494d-oeuxktfbh44d5u81.js | 147ms | 58ms | 5ms | 3rd |
| https://chatgpt.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 91ms | 84ms | 1ms | 3rd |
FJS BundlesAction263 scripts, 2.0 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://chatgpt.com/cdn/assets/1a7ebd5f-cd95disc6crjb2tf.js | 1140 KB | 835 KB (73%) | ✓ | 3rd |
| https://chatgpt.com/cdn/assets/4813494d-oeuxktfbh44d5u81.js | 802 KB | 424 KB (53%) | ✓ | 3rd |
| https://chatgpt.com/cdn/assets/97f4f1ec-d18deg41tbpselyl.js | 432 KB | 346 KB (80%) | ✓ | 3rd |
| https://chatgpt.com/cdn/assets/2340486e-odcog1ngty5j2ajp.js | 235 KB | 110 KB (47%) | ✓ | 3rd |
| https://chatgpt.com/cdn/assets/b533a235-c07bcwnuujytlc7a.js | 113 KB | 95 KB (85%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | 73 KB (76%) | ✓ | 3rd |
| https://chatgpt.com/cdn/assets/e21b3b3f-gasd9v457b2ujozz.js | 78 KB | 34 KB (44%) | ✓ | 3rd |
| https://chatgpt.com/cdn/assets/d8cd1f45-gk2t4x36g7dphhpi.js | 34 KB | 31 KB (91%) | ✓ | 3rd |
| https://chatgpt.com/cdn/assets/38b1cb71-fzg768ixafimax60.js | 32 KB | 27 KB (84%) | ✓ | 3rd |
| https://chatgpt.com/cdn/assets/089c718c-ffthnr1lwdbo8wf7.js | 28 KB | 25 KB (91%) | ✓ | 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 InventoryAction313 resources · 4.4 MB · 2.0 MB savings availableFIX
~2.0 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 313 resources | 4.4 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| max-age | 0 | Cache for 0 seconds |
| no-store | — | Never cache this response |
| no-cache | — | Cache but always revalidate first |
| must-revalidate | — | Must recheck with server after expiry |
| post-check | 0 | |
| pre-check | 0 |
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization7 images, 0 KB saveablePASS
A+Font Loading1 fonts (50 KB)PASS
Web fonts
1
50 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+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall313 requests over 3324msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
chatgpt.com chatgpt.com | Other | 1249ms | 235 KB | 47% | $17/mo | Costly |
Unattributable Unattributable | Other | 469ms | 0 KB | — | $6/mo | Costly |
chatgpt.com chatgpt.com | Other | 440ms | 65 KB | — | $6/mo | Costly |
chatgpt.com chatgpt.com | Other | 215ms | 1140 KB | 73% | $3/mo | Costly |
chatgpt.com chatgpt.com | Other | 147ms | 802 KB | 53% | $2/mo | Optional |
chatgpt.com chatgpt.com | Other | 91ms | 0 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- chatgpt.com adds 1249ms and costs ~$17/month
- Unattributable adds 469ms and costs ~$6/month
- chatgpt.com adds 440ms and costs ~$6/month
- chatgpt.com adds 215ms 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
chatgpt.com takes 1249ms 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 469ms 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
chatgpt.com takes 440ms 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
chatgpt.com takes 215ms 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
73% of chatgpt.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
53% of chatgpt.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