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.
680 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.85 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
218 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.46 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.
2.93 s
Page Load Progression
DThird-Party ImpactAction69% third-party, 0 ms blockingFIX
FJS BundlesAction40 scripts, 666 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 | 124 KB (66%) | ✓ | 3rd |
| https://superuser.com/Content/Js/full-anon.en.js?v=037e97b07fca | 129 KB | 94 KB (73%) | ✓ | 1st |
| https://edge.aditude.io/prebid/9.30.0.js?fork=1&v=bf6611fc0393cee6578a23c9bb56896d&modules=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%3D | 131 KB | 94 KB (72%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js | 129 KB | 72 KB (56%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | 71 KB (75%) | ✓ | 3rd |
| https://raven-static.aditude.io/prod/1.19.14-y0ptsc/raven.js | 107 KB | 63 KB (59%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-S812YQPLT2 | 155 KB | 60 KB (39%) | ✓ | 3rd |
| https://dn0qt3r0xannq.cloudfront.net/stackoverflow-M6HzSe6yue/mapping.base/prebid-wrapper.js | 84 KB | 33 KB (39%) | ✓ | 3rd |
| https://superuser.com/Content/Js/webpack-chunks/svelte.en.js?v=f773033c4e0b | 32 KB | 32 KB (99%) | ✓ | 1st |
| https://superuser.com/Content/Js/third-party/npm/@stackoverflow/stacks/dist/js/stacks.min.js?v=c7bcc7a1b4fd | 30 KB | 22 KB (71%) | ✓ | 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 InventoryAction75 resources · 1.8 MB · 666 KB savings availableFIX
~665.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 75 resources | 1.8 MiB | ||||||
CPage Weight BudgetAction1.8 MB transferred, 75 requestsREVIEW
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
BImage Optimization14 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
CJS Execution CostAction1559ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://superuser.com/ | 303ms | 26ms | 7ms | 1st |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otGPP.js | 222ms | 197ms | 6ms | 3rd |
| Unattributable | 173ms | 6ms | 0ms | 3rd |
| https://dn0qt3r0xannq.cloudfront.net/stackoverflow-M6HzSe6yue/mapping.base/prebid-wrapper.js | 128ms | 113ms | 11ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 116ms | 81ms | 31ms | 3rd |
| https://superuser.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 114ms | 110ms | 1ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-S812YQPLT2 | 102ms | 83ms | 18ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js | 85ms | 34ms | 24ms | 3rd |
| https://edge.aditude.io/prebid/9.30.0.js?fork=1&v=bf6611fc0393cee6578a23c9bb56896d&modules=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%3D | 75ms | 59ms | 16ms | 3rd |
| https://raven-static.aditude.io/prod/1.19.14-y0ptsc/raven.js | 73ms | 52ms | 20ms | 3rd |
Showing top 10 of 13 scripts
BHTTP CachingprivateREVIEW
private
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
A+Text CompressionAll text resources are compressedPASS
A+Font LoadingNo web fonts (system fonts)PASS
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 Waterfall75 requests over 3536msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
OneTrust cdn.cookielaw.org | Consent | 222ms | 22 KB | — | $3/mo | Essential |
Unattributable Unattributable | Other | 173ms | 0 KB | — | $2/mo | Optional |
dn0qt3r0xannq.cloudfront.net dn0qt3r0xannq.cloudfront.net | Other | 128ms | 84 KB | 39% | $2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 116ms | 188 KB | 66% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 102ms | 155 KB | 39% | $1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 85ms | 129 KB | 56% | $1/mo | Essential |
edge.aditude.io edge.aditude.io | Other | 75ms | 131 KB | 72% | $1/mo | Optional |
raven-static.aditude.io raven-static.aditude.io | Other | 73ms | 107 KB | 59% | $1/mo | Optional |
dn0qt3r0xannq.cloudfront.net dn0qt3r0xannq.cloudfront.net | Other | 57ms | 4 KB | — | $1/mo | Optional |
66% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
66% 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
56% of OneTrust'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
72% of edge.aditude.io'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
59% of raven-static.aditude.io'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