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.
2.52 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.52 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
636 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.
2.52 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.
4.93 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CJS Execution CostAction1894ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 824ms | 420ms | 0ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202507.1.0/otBannerSdk.js | 598ms | 460ms | 42ms | 3rd |
| https://www.biblegateway.com/ | 154ms | 17ms | 9ms | 3rd |
| https://www.biblegateway.com/assets/js/chunks/56588b3f/main-989eebf3.js | 136ms | 92ms | 12ms | 3rd |
| https://www.biblegateway.com/assets/js/init.min.js?56588b3f | 127ms | 117ms | 2ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/otSDKStub.js | 55ms | 43ms | 2ms | 3rd |
BJS Bundles18 scripts, 79 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.cookielaw.org/scripttemplates/202507.1.0/otBannerSdk.js | 120 KB | 56 KB (46%) | ✓ | 3rd |
| https://www.biblegateway.com/assets/js/chunks/56588b3f/main-989eebf3.js | 43 KB | 23 KB (54%) | ✓ | 3rd |
| https://www.biblegateway.com/assets/js/chunks/56588b3f/plus-aa6b2a10.js | 6 KB | — | ✓ | 3rd |
| https://www.biblegateway.com/assets/js/chunks/56588b3f/ChangePassword-240332cc.js | 3 KB | — | ✓ | 3rd |
| https://www.biblegateway.com/assets/js/chunks/56588b3f/Signup-eb9fbaba.js | 14 KB | — | ✓ | 3rd |
| https://www.biblegateway.com/assets/js/chunks/56588b3f/Home-a2371f9a.js | 1 KB | — | ✓ | 3rd |
| https://www.biblegateway.com/assets/js/chunks/56588b3f/_commonjsHelpers-dcc10d27.js | 1 KB | — | ✓ | 3rd |
| https://www.biblegateway.com/assets/js/chunks/56588b3f/hmac-7bf7500a.js | 2 KB | — | ✓ | 3rd |
| https://www.biblegateway.com/assets/js/init.min.js?56588b3f | 11 KB | — | ✓ | 3rd |
| https://www.biblegateway.com/assets/js/chunks/56588b3f/main.min.js | 0 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Page Weight Budget583 KB transferred, 38 requestsPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization2 images, 0 KB saveablePASS
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
APage Weight Inventory38 resources · 583 KB · 79 KB savings availablePASS
~78.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 38 resources | 583.4 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall38 requests over 823msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 824ms | 0 KB | — | €9/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 598ms | 120 KB | 46% | €6/mo | Essential |
www.biblegateway.com www.biblegateway.com | Other | 154ms | 24 KB | — | €2/mo | Optional |
www.biblegateway.com www.biblegateway.com | Other | 136ms | 43 KB | 54% | €1/mo | Optional |
www.biblegateway.com www.biblegateway.com | Other | 127ms | 11 KB | — | €1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 55ms | 9 KB | — | €1/mo | Essential |
These scripts may cost more than they're worth
- Unattributable adds 824ms and costs ~€9/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
Unattributable takes 824ms 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
54% of www.biblegateway.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