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.
930 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.76 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
210 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.
1.66 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.
3.09 s
Page Load Progression
FPage Weight BudgetAction7.4 MB transferred, 108 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 CostAction2943ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.bustle.com/ | 1236ms | 3ms | 1ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 429ms | 348ms | 18ms | 3rd |
| Unattributable | 303ms | 25ms | 0ms | 3rd |
| https://cdn2.bustle.com/2026/bustle/HubPage-b8764176d1.js | 209ms | 195ms | 5ms | 3rd |
| https://d15kdpgjg3unno.cloudfront.net/oPS.js | 186ms | 166ms | 15ms | 3rd |
| https://cmp.inmobi.com/tcfv2/61/cmp2.js?referer=www.bustle.com | 130ms | 94ms | 18ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-C3PETV5ZL1 | 123ms | 97ms | 23ms | 3rd |
| https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js | 98ms | 79ms | 7ms | 3rd |
| https://cdn2.bustle.com/2026/bustle/main-2a88bb4eb4.js | 70ms | 21ms | 12ms | 3rd |
| https://cdn2.bustle.com/2026/bustle/prebid-light-4eb2a90476.js | 57ms | 49ms | 8ms | 3rd |
Showing top 10 of 12 scripts
DJS BundlesAction32 scripts, 357 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 188 KB | 81 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-C3PETV5ZL1 | 168 KB | 64 KB (38%) | ✓ | 3rd |
| https://cmp.inmobi.com/tcfv2/61/cmp2.js?referer=www.bustle.com | 117 KB | 56 KB (48%) | ✓ | 3rd |
| https://cdn2.bustle.com/2026/bustle/prebid-light-4eb2a90476.js | 93 KB | 38 KB (41%) | ✓ | 3rd |
| https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js | 73 KB | 31 KB (42%) | ✓ | 3rd |
| https://cdn.id5-sync.com/api/1.0/esp.js | 35 KB | 31 KB (89%) | ✓ | 3rd |
| https://cdn2.bustle.com/2026/bustle/HubPage-b8764176d1.js | 54 KB | 28 KB (53%) | ✓ | 3rd |
| https://cdn2.bustle.com/2026/bustle/main-2a88bb4eb4.js | 74 KB | 28 KB (38%) | ✓ | 3rd |
| https://d1mkq4fbm7j30i.cloudfront.net/17/oHS-17.js | 1 KB | — | ✓ | 3rd |
| https://cdn2.bustle.com/2025/workspace/bdga-69dee8f6c7.js | 26 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
DPage Weight InventoryAction108 resources · 7.4 MB · 357 KB savings availableFIX
~357.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 108 resources | 7.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization28 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 (147 KB)PASS
Web fonts
6
147 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 HintsNo optimization neededPASS
Network Waterfall108 requests over 3264msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.bustle.com www.bustle.com | Other | 1236ms | 80 KB | — | €13/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 429ms | 188 KB | 43% | €5/mo | Costly |
Unattributable Unattributable | Other | 303ms | 0 KB | — | €3/mo | Costly |
cdn2.bustle.com cdn2.bustle.com | Other | 209ms | 54 KB | 53% | €2/mo | Costly |
d15kdpgjg3unno.cloudfront.net d15kdpgjg3unno.cloudfront.net | Other | 186ms | 60 KB | — | €2/mo | Optional |
cmp.inmobi.com cmp.inmobi.com | Other | 130ms | 117 KB | 48% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 123ms | 168 KB | 38% | €1/mo | Optional |
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 98ms | 73 KB | 42% | €1/mo | Optional |
cdn2.bustle.com cdn2.bustle.com | Other | 70ms | 74 KB | 38% | €1/mo | Optional |
cdn2.bustle.com cdn2.bustle.com | Other | 57ms | 93 KB | 41% | €1/mo | Optional |
cdn2.bustle.com cdn2.bustle.com | Other | 52ms | 12 KB | — | €1/mo | Optional |
cdn2.bustle.com cdn2.bustle.com | Other | 50ms | 26 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.bustle.com adds 1236ms and costs ~€13/month
- securepubads.g.doubleclick.net adds 429ms and costs ~€5/month
- Unattributable adds 303ms and costs ~€3/month
- cdn2.bustle.com adds 209ms and costs ~€2/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.bustle.com takes 1236ms 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
securepubads.g.doubleclick.net takes 429ms 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 303ms 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
cdn2.bustle.com takes 209ms 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 cdn2.bustle.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