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.
1.99 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.20 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.51 s
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.
3.54 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.
23.15 s
Page Load Progression
FPage Weight BudgetAction3.5 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
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
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 ImpactAction86% third-party, 0 ms blockingFIX
FJS Execution CostAction5560ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1558ms | 665ms | 0ms | 3rd |
| https://mashable.com/ | 1000ms | 43ms | 6ms | 1st |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js | 377ms | 314ms | 60ms | 3rd |
| https://cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js | 291ms | 217ms | 46ms | 3rd |
| https://mashable.com/js/app.js?id=e26fe96b1b5434d4a56e4078e6fed4ee | 229ms | 187ms | 23ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-BPBF083TYP | 214ms | 174ms | 39ms | 3rd |
| https://cdn.ziffstatic.com/pg/mashable.prebid.js | 194ms | 123ms | 71ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MN78SWW | 190ms | 154ms | 29ms | 3rd |
| https://client.aps.amazon-adsystem.com/publisher.js | 172ms | 140ms | 27ms | 3rd |
| https://cdn.ziffstatic.com/pg/mashable.js | 158ms | 118ms | 26ms | 3rd |
Showing top 10 of 21 scripts
FJS BundlesAction42 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.ziffstatic.com/pg/mashable.prebid.js | 233 KB | 188 KB (81%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js | 186 KB | 127 KB (68%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-BPBF083TYP&cx=c>m=4e64e1 | 171 KB | 113 KB (66%) | ✓ | 3rd |
| https://assets.bounceexchange.com/assets/smart-tag/versioned/main-v2_a8ec0b4e51efd1e1ddbdf1b4c6576803.br.js | 116 KB | 88 KB (76%) | ✓ | 3rd |
| https://forms.mashable.com/w37htfhcq2/vendor/21eb8417-1342-4fb5-bf97-c723ef76f297/main.js?cb=8DCB3ECB413095BC01D1B29BF4757228 | 117 KB | 73 KB (62%) | ✓ | 3rd |
| https://cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js | 126 KB | 72 KB (57%) | ✓ | 3rd |
| https://cdn.ziffstatic.com/pg/mashable.js | 85 KB | 69 KB (81%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-BPBF083TYP | 172 KB | 67 KB (39%) | ✓ | 3rd |
| https://openads-cdn.adsrvr.org/openadsjs/build/v1.0/ziffdavis/openads.js | 98 KB | 67 KB (69%) | ✓ | 3rd |
| https://mashable.com/js/app.js?id=e26fe96b1b5434d4a56e4078e6fed4ee | 82 KB | 62 KB (76%) | ✓ | 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
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 InventoryAction108 resources · 3.5 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 108 resources | 3.5 MiB | ||||||
BImage Optimization24 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Text CompressionAll text resources are compressedPASS
A+Font Loading1 fonts (33 KB)PASS
Web fonts
1
33 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 Hints12 hints, 0 missing preconnectsPASS
Current Resource Hints
12 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
A+HTTP Cachingmax-age=1800 (30 minutes)PASS
public, max-age=1800
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 1800 | Cache for 30 minutes |
Network Waterfall108 requests over 2317msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1558ms | 0 KB | — | €25/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 377ms | 186 KB | 68% | €6/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 291ms | 126 KB | 57% | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 214ms | 172 KB | 39% | €3/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 194ms | 233 KB | 81% | €3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 190ms | 132 KB | 46% | €3/mo | Optional |
client.aps.amazon-adsystem.com client.aps.amazon-adsystem.com | Other | 172ms | 91 KB | 55% | €3/mo | Optional |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 158ms | 85 KB | 81% | €3/mo | Optional |
assets.bounceexchange.com assets.bounceexchange.com | Other | 141ms | 116 KB | 76% | €2/mo | Optional |
openads-cdn.adsrvr.org openads-cdn.adsrvr.org | Other | 141ms | 98 KB | 69% | €2/mo | Optional |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 138ms | 0 KB | — | €2/mo | Optional |
pub.doubleverify.com pub.doubleverify.com | Other | 125ms | 31 KB | — | €2/mo | Optional |
assets.bounceexchange.com assets.bounceexchange.com | Other | 115ms | 41 KB | 80% | €2/mo | Optional |
forms.mashable.com forms.mashable.com | Other | 108ms | 117 KB | 62% | €2/mo | Optional |
cdn.static.zdbb.net cdn.static.zdbb.net | Other | 107ms | 0 KB | — | €2/mo | Optional |
forms.mashable.com forms.mashable.com | Other | 103ms | 1 KB | — | €2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 74ms | 35 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 65ms | 171 KB | 66% | €1/mo | Optional |
static.chartbeat.com static.chartbeat.com | Other | 61ms | 25 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1558ms and costs ~€25/month
- securepubads.g.doubleclick.net adds 377ms and costs ~€6/month
- cdn.ziffstatic.com adds 291ms and costs ~€5/month
- Google Tag Manager adds 214ms and costs ~€3/month
78% 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 1558ms 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 377ms 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
68% of securepubads.g.doubleclick.net'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
cdn.ziffstatic.com takes 291ms 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 cdn.ziffstatic.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
Google Tag Manager takes 214ms 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
81% of cdn.ziffstatic.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
55% of client.aps.amazon-adsystem.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
81% of cdn.ziffstatic.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
76% of assets.bounceexchange.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
69% of openads-cdn.adsrvr.org'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
80% of assets.bounceexchange.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
62% of forms.mashable.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
66% of Google Tag Manager'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