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.
5.09 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
13.42 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.01 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.418
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.71 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.
14.52 s
Page Load Progression
DPage Weight BudgetAction2.4 MB transferred, 41 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2292ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.smashwords.com/static/dist/js/react.37d49bfa.chunk.js | 779ms | 626ms | 41ms | 3rd |
| https://www.smashwords.com/ | 388ms | 11ms | 3ms | 3rd |
| Unattributable | 259ms | 7ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-0HDVFTDL0S | 250ms | 204ms | 36ms | 3rd |
| https://www.smashwords.com/static/dist/js/main.cff9ff76.chunk.js | 230ms | 165ms | 61ms | 3rd |
| https://www.smashwords.com/static/dist/js/13.15dd9909.chunk.js | 215ms | 27ms | 177ms | 3rd |
| https://www.smashwords.com/static/dist/js/1.13231034.chunk.js | 171ms | 140ms | 25ms | 3rd |
FJS BundlesAction8 scripts, 727 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.smashwords.com/static/dist/js/13.15dd9909.chunk.js | 581 KB | 358 KB (62%) | ✓ | 3rd |
| https://www.smashwords.com/static/dist/js/main.cff9ff76.chunk.js | 194 KB | 146 KB (76%) | ✓ | 3rd |
| https://www.smashwords.com/static/dist/js/react.37d49bfa.chunk.js | 153 KB | 114 KB (75%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-0HDVFTDL0S | 149 KB | 61 KB (41%) | ✓ | 3rd |
| https://www.smashwords.com/static/dist/js/1.13231034.chunk.js | 99 KB | 48 KB (49%) | ✓ | 3rd |
| https://www.smashwords.com/static/dist/js/runtime.7cf3c255.js | 3 KB | — | ✓ | 3rd |
| https://www.smashwords.com/static/dist/js/4.1be4e192.chunk.js | 11 KB | — | ✓ | 3rd |
| https://www.google-analytics.com/analytics.js | 21 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 InventoryAction41 resources · 2.4 MB · 727 KB savings availableFIX
~727.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 41 resources | 2.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization21 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 Loading1 fonts (61 KB)PASS
Web fonts
1
61 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~18 KB and ~36 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
Network Waterfall41 requests over 3378msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.smashwords.com www.smashwords.com | Other | 779ms | 153 KB | 75% | $4/mo | Costly |
www.smashwords.com www.smashwords.com | Other | 388ms | 4 KB | — | $2/mo | Costly |
Unattributable Unattributable | Other | 259ms | 0 KB | — | $1/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 250ms | 149 KB | 41% | $1/mo | Costly |
www.smashwords.com www.smashwords.com | Other | 230ms | 194 KB | 76% | $1/mo | Costly |
www.smashwords.com www.smashwords.com | Other | 215ms | 581 KB | 62% | $1/mo | Costly |
www.smashwords.com www.smashwords.com | Other | 171ms | 99 KB | 49% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.smashwords.com adds 779ms and costs ~$4/month
- www.smashwords.com adds 388ms and costs ~$2/month
- Unattributable adds 259ms and costs ~$1/month
- Google Tag Manager adds 250ms and costs ~$1/month
- www.smashwords.com adds 230ms and costs ~$1/month
- www.smashwords.com adds 215ms and costs ~$1/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.smashwords.com takes 779ms 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
75% of www.smashwords.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
www.smashwords.com 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
Unattributable takes 259ms 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 250ms 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.smashwords.com takes 230ms 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
76% of www.smashwords.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
www.smashwords.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
62% of www.smashwords.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