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.
5.66 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.65 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
974 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.
9.37 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.
16.17 s
Page Load Progression
FPage Weight BudgetAction10.4 MB transferred, 171 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
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
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
FJS Execution CostAction7105436173002ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 7105436169031ms | 53ms | 0ms | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/e_warp_warp_page_edison-vfltPCDXA.js | 1057ms | 252ms | 160ms | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/c_redux_namespaces-vfllYdCgN.js | 797ms | 745ms | 1ms | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/c_fingerprintjs_fpjs-pro-static_fp-vflGINDbV.js | 765ms | 628ms | 13ms | 3rd |
| https://www.dropbox.com/ | 358ms | 53ms | 21ms | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/e_core_exception_reporter-vflkYePyQ.js | 324ms | 270ms | 11ms | 3rd |
| https://cfl.dropboxstatic.com/static/metaserver/static/js/alameda_bundle/alameda_bundle_chrome_en-vflA1HMTy.js | 204ms | 198ms | 5ms | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/e_react-dom-vflxkx0XF.js | 146ms | 111ms | 12ms | 3rd |
| https://accounts.google.com/gsi/client | 97ms | 78ms | 19ms | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/c_src_sink_index-vflMUc-EK.js | 91ms | 59ms | 4ms | 3rd |
Showing top 10 of 12 scripts
FJS BundlesAction91 scripts, 682 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/e_warp_warp_page_edison-vfltPCDXA.js | 521 KB | 276 KB (53%) | ✓ | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/c_dig-icons_assets_index-vflpQZGof.js | 135 KB | 129 KB (96%) | ✓ | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/c_trial-cards_trial-comparison-card-vfl9c_9fi.js | 110 KB | 99 KB (90%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | 69 KB (73%) | ✓ | 3rd |
| https://cfl.dropboxstatic.com/static/metaserver/static/pithos/zoom_chat_client.bundle-vflrib4M-.js | 74 KB | 57 KB (76%) | ✓ | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/c_fingerprintjs_fpjs-pro-static_fp-vflGINDbV.js | 82 KB | 28 KB (34%) | ✓ | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/e_core_exception_reporter-vflkYePyQ.js | 34 KB | 25 KB (73%) | ✓ | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/c_jotai_vanilla-vflyzBtQo.js | 3 KB | — | ✓ | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/c_dig-logos_src_glyph_fss-monochrome-vfl3RLaKd.js | 1 KB | — | ✓ | 3rd |
| https://cfl.dropboxstatic.com/static/atlas/warp/warp_page_edison_bundle_amd/dist/e_edison-vfl1Tx3W0.js | 7 KB | — | ✓ | 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 InventoryAction171 resources · 10.4 MB · 682 KB savings availableFIX
~682.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 171 resources | 10.4 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-cache, no-store
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
BImage Optimization16 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (315 KB)PASS
Web fonts
6
315 KB total
Render-blocking
0
of 6
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 Hints7 hints, 0 missing preconnectsPASS
Current Resource Hints
7 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall171 requests over 5731msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 7105436169031ms | 0 KB | — | $122728646230/mo | Costly |
cfl.dropboxstatic.com cfl.dropboxstatic.com | Other | 1057ms | 521 KB | 53% | $18/mo | Costly |
cfl.dropboxstatic.com cfl.dropboxstatic.com | Other | 797ms | 4 KB | — | $14/mo | Costly |
cfl.dropboxstatic.com cfl.dropboxstatic.com | Other | 765ms | 82 KB | 34% | $13/mo | Costly |
www.dropbox.com www.dropbox.com | Other | 358ms | 45 KB | — | $6/mo | Costly |
cfl.dropboxstatic.com cfl.dropboxstatic.com | Other | 324ms | 34 KB | 73% | $6/mo | Costly |
cfl.dropboxstatic.com cfl.dropboxstatic.com | Other | 204ms | 22 KB | — | $4/mo | Costly |
cfl.dropboxstatic.com cfl.dropboxstatic.com | Other | 146ms | 47 KB | — | $3/mo | Optional |
accounts.google.com accounts.google.com | Other | 97ms | 96 KB | 73% | $2/mo | Optional |
cfl.dropboxstatic.com cfl.dropboxstatic.com | Other | 91ms | 16 KB | — | $2/mo | Optional |
cfl.dropboxstatic.com cfl.dropboxstatic.com | Other | 74ms | 10 KB | — | $1/mo | Optional |
cfl.dropboxstatic.com cfl.dropboxstatic.com | Other | 57ms | 11 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 7105436169031ms and costs ~$122728646230/month
- cfl.dropboxstatic.com adds 1057ms and costs ~$18/month
- cfl.dropboxstatic.com adds 797ms and costs ~$14/month
- cfl.dropboxstatic.com adds 765ms and costs ~$13/month
- www.dropbox.com adds 358ms and costs ~$6/month
- cfl.dropboxstatic.com adds 324ms and costs ~$6/month
- cfl.dropboxstatic.com adds 204ms and costs ~$4/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
Unattributable takes 7105436169031ms 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
cfl.dropboxstatic.com takes 1057ms 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 cfl.dropboxstatic.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
cfl.dropboxstatic.com takes 797ms 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
cfl.dropboxstatic.com takes 765ms 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.dropbox.com takes 358ms 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
cfl.dropboxstatic.com takes 324ms 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 cfl.dropboxstatic.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
cfl.dropboxstatic.com takes 204ms 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 accounts.google.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