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.
6.55 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
13.90 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5.72 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.209
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
10.93 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.
17.04 s
Page Load Progression
DPage Weight BudgetAction2.2 MB transferred, 51 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 Execution CostAction14908ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.basf.com/main.a2401690b64a7e50.js | 9614ms | 4599ms | 18ms | 3rd |
| https://www.basf.com/sg/en | 2507ms | 10ms | 1ms | 3rd |
| Unattributable | 1279ms | 246ms | 0ms | 3rd |
| https://www.basf.com/polyfills.46b4b402e725ddee.js | 885ms | 239ms | 0ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202508.2.0/otBannerSdk.js | 430ms | 272ms | 64ms | 3rd |
| https://blackberry.basf.com/wxp/prod/utag.js | 138ms | 121ms | 12ms | 3rd |
| https://www.basf.com/atoms-core.1a6071f8698cb027.css | 55ms | 0ms | 0ms | 3rd |
FJS BundlesAction14 scripts, 515 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.basf.com/main.a2401690b64a7e50.js | 864 KB | 453 KB (53%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202508.2.0/otBannerSdk.js | 121 KB | 62 KB (51%) | ✓ | 3rd |
| https://www.basf.com/7907.b93b0963c6abfb96.js | 4 KB | — | ✓ | 3rd |
| https://blackberry.basf.com/wxp/prod/utag.js | 27 KB | — | ✓ | 3rd |
| https://www.basf.com/common.35c790705008dd57.js | 11 KB | — | ✓ | 3rd |
| https://www.basf.com/131.21a6094f7626eb56.js | 2 KB | — | ✓ | 3rd |
| https://www.basf.com/runtime.a8191b0c48a9578c.js | 4 KB | — | ✓ | 3rd |
| https://www.basf.com/8945.f4b86e4d988369f6.js | 4 KB | — | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/otSDKStub.js | 9 KB | — | ✓ | 3rd |
| https://blackberry.basf.com/wxp/prod/utag.v.js?a=basf/wxp/202604130842&cb=1776810852236 | 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
FPage Weight InventoryAction51 resources · 2.2 MB · 515 KB savings availableFIX
~515.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 51 resources | 2.2 MiB | ||||||
BImage Optimization10 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (137 KB)PASS
Web fonts
4
137 KB total
Render-blocking
0
of 4
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+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AHTTP Cachingmax-age=300 (5 minutes)PASS
max-age=300
| Directive | Value | Meaning |
|---|---|---|
| max-age | 300 | Cache for 5 minutes |
Network Waterfall51 requests over 5787msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.basf.com www.basf.com | Other | 9614ms | 864 KB | 53% | $128/mo | Costly |
www.basf.com www.basf.com | Other | 2507ms | 84 KB | — | $33/mo | Costly |
Unattributable Unattributable | Other | 1279ms | 0 KB | — | $17/mo | Costly |
www.basf.com www.basf.com | Other | 885ms | 13 KB | — | $12/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 430ms | 121 KB | 51% | $6/mo | Essential |
blackberry.basf.com blackberry.basf.com | Other | 138ms | 27 KB | — | $2/mo | Optional |
www.basf.com www.basf.com | Other | 55ms | 60 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- www.basf.com adds 9614ms and costs ~$128/month
- www.basf.com adds 2507ms and costs ~$33/month
- Unattributable adds 1279ms and costs ~$17/month
- www.basf.com adds 885ms and costs ~$12/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.basf.com takes 9614ms 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
53% of www.basf.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
www.basf.com takes 2507ms 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
Unattributable takes 1279ms 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
www.basf.com takes 885ms 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
51% 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