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.
1.21 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.57 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
283 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.
1.98 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.
3.59 s
Page Load Progression
DPage Weight BudgetAction2.5 MB transferred, 63 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
FJS BundlesAction24 scripts, 579 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604210101/pubads_impl.js?cb=31098008 | 188 KB | 128 KB (68%) | ✓ | 3rd |
| https://ssl.p.jwpcdn.com/player/v/8.47.0/provider.hlsjs.js | 139 KB | 81 KB (58%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otBannerSdk.js | 124 KB | 74 KB (60%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-YNNTJ4JETN&cx=c>m=4e64m0h2 | 165 KB | 65 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WT6XGWDH>m=4e64m0h2 | 122 KB | 61 KB (50%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-DK3GDWHWJH&cx=c>m=4e64m0h2 | 150 KB | 60 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5P3SZGS | 139 KB | 57 KB (41%) | ✓ | 3rd |
| https://www.byrdie.com/static/4.210.0/cache/eNp9lFFugzAMhi80xhm6adpTpWrjAiYx4BJiFDtU7ekXqq0tXeAhKPH3x0l-W5SioGTKAbw6LI9SagCDL-UybngY2aNXKR2cOeqsPEphOjT9szghx2DRZoBh7gklQ6KSI82zxhdb2PKwyecn9eTbTdGE3nIotQusKbSSBguwssrMacqwIU2KOiD0I1Oy8CZJrEaIet68mIPLWeiCyW32DbXPEke1LHXpEAyCRon9RiWNhOb6yd0ZznXOgxFaLCbC00beVodrqR2ZvvjzPpcr1hLrDHjfH-5RttGhrHTIHYLdowYyUs0HYshq4tWSonHM4XmZ2_DtWLPg81DNI4cUQos6d5tAg45Ecyoxy0a6k4CpEyNW_3x7fOtvKxQw0nJ1kz_UIx0072rH7E2-qrd5rKFr_dLkY0Kf92I3wIV9eYh1emyHYRctoTcJ_g-t9q68Rj8huS79H1ZsaQJKB7XDnZUfrsfFmQ.min.js | 47 KB | 30 KB (65%) | ✓ | 3rd |
| https://content.jwplatform.com/libraries/1eeJqkNk.js | 65 KB | 23 KB (36%) | ✓ | 3rd |
| https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015 | 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 InventoryAction63 resources · 2.5 MB · 579 KB savings availableFIX
~578.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 63 resources | 2.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization12 images, 0 KB saveableREVIEW
CJS Execution CostAction1645ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.byrdie.com/ | 266ms | 25ms | 9ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otGPP.js | 213ms | 174ms | 6ms | 3rd |
| https://ssl.p.jwpcdn.com/player/v/8.47.0/provider.hlsjs.js | 212ms | 162ms | 20ms | 3rd |
| https://www.byrdie.com/static/4.210.0/cache/eNp9lFFugzAMhi80xhm6adpTpWrjAiYx4BJiFDtU7ekXqq0tXeAhKPH3x0l-W5SioGTKAbw6LI9SagCDL-UybngY2aNXKR2cOeqsPEphOjT9szghx2DRZoBh7gklQ6KSI82zxhdb2PKwyecn9eTbTdGE3nIotQusKbSSBguwssrMacqwIU2KOiD0I1Oy8CZJrEaIet68mIPLWeiCyW32DbXPEke1LHXpEAyCRon9RiWNhOb6yd0ZznXOgxFaLCbC00beVodrqR2ZvvjzPpcr1hLrDHjfH-5RttGhrHTIHYLdowYyUs0HYshq4tWSonHM4XmZ2_DtWLPg81DNI4cUQos6d5tAg45Ecyoxy0a6k4CpEyNW_3x7fOtvKxQw0nJ1kz_UIx0072rH7E2-qrd5rKFr_dLkY0Kf92I3wIV9eYh1emyHYRctoTcJ_g-t9q68Rj8huS79H1ZsaQJKB7XDnZUfrsfFmQ.min.js | 185ms | 90ms | 7ms | 3rd |
| Unattributable | 183ms | 7ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-DK3GDWHWJH&cx=c>m=4e64m0h2 | 137ms | 98ms | 24ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604210101/pubads_impl.js?cb=31098008 | 135ms | 95ms | 29ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5P3SZGS | 130ms | 99ms | 22ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-YNNTJ4JETN&cx=c>m=4e64m0h2 | 116ms | 95ms | 20ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WT6XGWDH>m=4e64m0h2 | 69ms | 54ms | 14ms | 3rd |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (42 KB)PASS
Web fonts
3
42 KB total
Render-blocking
0
of 3
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
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall63 requests over 2370msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.byrdie.com www.byrdie.com | Other | 266ms | 64 KB | — | $4/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 213ms | 22 KB | — | $3/mo | Essential |
ssl.p.jwpcdn.com ssl.p.jwpcdn.com | Other | 212ms | 139 KB | 58% | $3/mo | Costly |
www.byrdie.com www.byrdie.com | Other | 185ms | 47 KB | 65% | $2/mo | Optional |
Unattributable Unattributable | Other | 183ms | 0 KB | — | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 137ms | 150 KB | 40% | $2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 135ms | 188 KB | 68% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 130ms | 139 KB | 41% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 116ms | 165 KB | 39% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 69ms | 122 KB | 50% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.byrdie.com adds 266ms and costs ~$4/month
- ssl.p.jwpcdn.com adds 212ms and costs ~$3/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.byrdie.com takes 266ms 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
ssl.p.jwpcdn.com takes 212ms 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
58% of ssl.p.jwpcdn.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
65% of www.byrdie.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
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