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.
1.94 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.85 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
123 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.159
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.18 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.
9.90 s
Page Load Progression
FPage Weight BudgetAction9.6 MB transferred, 68 requestsFIX
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS BundlesAction28 scripts, 398 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-aaa34762c4015c12dbf7c2d6883709c8.js | 129 KB | 94 KB (73%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js | 128 KB | 68 KB (53%) | ✓ | 3rd |
| https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-ff0c766f3b5d322e3d21bf41ecd584ab.js | 109 KB | 68 KB (62%) | ✓ | 3rd |
| https://tags.tiqcdn.com/utag/blackrock/main/prod/utag.js | 92 KB | 64 KB (70%) | ✓ | 3rd |
| https://sourcedefense.blackrock.com/cdncch/vice_release/1.23.9.3 | 58 KB | 44 KB (76%) | ✓ | 3rd |
| https://www.blackrock.com/vGiSZvKzcsfCP/giHHrQ9of/uJXjw/fcN3DJiN/bx5eaywUEwE/LVNAEmhu/c3MPAg?v=c33dd68a-c896-314b-6b2a-6a1c948d172c | 156 KB | 31 KB (20%) | ✓ | 3rd |
| https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-e4aa278323a058f5ccd4b4a3eb99c441.js | 33 KB | 29 KB (89%) | ✓ | 3rd |
| https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-c5f6630e099a3f93beaabda725787aae.js | 1 KB | — | ✓ | 3rd |
| https://www.blackrock.com/akam/13/5417da3b | 9 KB | — | ✓ | 3rd |
| https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-767f4dffab4f6ee67fb69a31e76f6a19.js | 2 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
DPage Weight InventoryAction68 resources · 9.6 MB · 398 KB savings availableFIX
~398.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 68 resources | 9.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction10 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
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 CostAction1939ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.blackrock.com/tw | 529ms | 7ms | 2ms | 3rd |
| https://www.blackrock.com/vGiSZvKzcsfCP/giHHrQ9of/uJXjw/fcN3DJiN/bx5eaywUEwE/LVNAEmhu/c3MPAg?v=c33dd68a-c896-314b-6b2a-6a1c948d172c | 368ms | 335ms | 17ms | 3rd |
| Unattributable | 352ms | 95ms | 0ms | 3rd |
| https://sourcedefense.blackrock.com/cdncch/vice_loader/blackrock/blackrockprod | 187ms | 162ms | 6ms | 3rd |
| https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-aaa34762c4015c12dbf7c2d6883709c8.js | 136ms | 100ms | 12ms | 3rd |
| https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-ff0c766f3b5d322e3d21bf41ecd584ab.js | 134ms | 19ms | 10ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js | 126ms | 73ms | 18ms | 3rd |
| https://www.blackrock.com/akam/13/5417da3b | 107ms | 48ms | 2ms | 3rd |
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 Loading11 fonts (8389 KB)PASS
Web fonts
11
8389 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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)
Fixing the unchecked items could save ~5558 KB and ~11116 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall68 requests over 6483msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.blackrock.com www.blackrock.com | Other | 529ms | 32 KB | — | $7/mo | Costly |
www.blackrock.com www.blackrock.com | Other | 368ms | 156 KB | 20% | $5/mo | Costly |
Unattributable Unattributable | Other | 352ms | 0 KB | — | $5/mo | Costly |
sourcedefense.blackrock.com sourcedefense.blackrock.com | Other | 187ms | 39 KB | — | $2/mo | Optional |
www.blackrock.com www.blackrock.com | Other | 136ms | 129 KB | 73% | $2/mo | Optional |
www.blackrock.com www.blackrock.com | Other | 134ms | 109 KB | 62% | $2/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 126ms | 128 KB | 53% | $2/mo | Essential |
www.blackrock.com www.blackrock.com | Other | 107ms | 9 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- www.blackrock.com adds 529ms and costs ~$7/month
- www.blackrock.com adds 368ms and costs ~$5/month
- Unattributable adds 352ms and costs ~$5/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.blackrock.com takes 529ms 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.blackrock.com takes 368ms 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 352ms 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
73% of www.blackrock.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
62% of www.blackrock.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
53% 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