Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop

Performance

Accessibility

100

Best Practices

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

766 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

766 ms

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

74 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.212

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

770 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.28 s

Page Load Progression

375 ms

750 ms

1.1 s

1.5 s

1.9 s

2.2 s

2.6 s

3.0 s

Checks

9 PASS 2 REVIEW 2 FIX

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (583.2 KiB of 583.4 KiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

HTTP Caching

Action

No cache headers

FIX

No cache headers

No Cache-Control header found

Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

JS Bundles

18 scripts, 79 KB unused

REVIEW

18 scripts, 79 KB unused

https://cdn.cookielaw.org/scripttemplates/202507.1...: 56 KB unused (46%)

Consider code splitting or tree shaking to reduce unused code.

https://www.biblegateway.com/assets/js/chunks/5658...: 23 KB unused (54%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 79 KB

79 KB unused JavaScript

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.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Page Weight Budget

583 KB transferred, 38 requests

PASS

583 KB transferred, 38 requests

Page weighs 3.0 MB (583 KB transferred)

38 HTTP requests

Estimated 0.12 g CO2 per page load

583 KB transferred

38 requests

0.12 g CO2 per page load

Other 263.0 KiB 45%

JavaScript 261.5 KiB 45%

HTML 23.9 KiB 4%

Images 21.7 KiB 4%

CSS 8.2 KiB 1%

Other 2.9 KiB 0%

Other 2.2 KiB 0%

0 2.4 MB 4.9 MB

Under budget

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

Image Optimization

2 images, 0 KB saveable

PASS

2 images, 0 KB saveable

All images are well-optimized

2 images 22 KB

0 oversized -0 KB

2 legacy format

0 missing dimensions CLS risk

A+

JS Execution Cost

347ms total JS execution

PASS

347ms total JS execution

Unattributable: 196ms CPU time

https://cdn.cookielaw.org/scripttemplates/202507.1...: 151ms CPU time

Third-party scripts: 347ms (100% of total)

Main Thread Breakdown

Script Evaluation 61% Other 22% Style & Layout 5% Parse HTML & CSS 5% Script Parsing & Compilation 4%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	196ms	100ms	0ms	3rd
https://cdn.cookielaw.org/scripttemplates/202507.1.0/otBannerSdk.js	151ms	118ms	9ms	3rd

A+

Font Loading

No web fonts (system fonts)

PASS

No web fonts (system fonts)

No web fonts loaded — system fonts are fastest

No web fonts loaded — system fonts are optimal.

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

No optimization needed

PASS

No optimization needed

No resource hint issues

Page Weight Inventory

38 resources · 583 KB · 79 KB savings available

PASS

38 resources · 583 KB · 79 KB savings available

Within 1MB page-weight target

Got: 583 KB

~79 KB of savings available

37 third-party resources (100% of weight)

38 resources · 583.4 KiB · 37 third-party Within 1MB page-weight target

JavaScript 45% · 261.5 KiB

Other 44% · 258.5 KiB

Image 5% · 26.6 KiB

Document 4% · 24.2 KiB

CSS 2% · 12.7 KiB

~78.7 KiB of savings available

Remove unused JavaScript: 78.7 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

38 resources			583.4 KiB

Network Waterfall

38 requests over 817ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

100% of JavaScript execution is third-party

First-party Third-party 347ms · 120KB · €4/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	196ms	0 KB	—	€2/mo	Optional
OneTrust cdn.cookielaw.org	Consent	151ms	120 KB	46%	€2/mo	Essential

Unattributable

Other

Optional

Execution 196ms

Transfer 0 KB

Monthly Cost €2/mo

OneTrust

Consent

Essential

Execution 151ms

Transfer 120 KB

Unused 46%

Monthly Cost €2/mo

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.