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https://blackrock.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
7
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
59
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

5.56 s

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

42.62 s

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

1.66 s

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

0.543

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

12.35 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.

47.22 s

Page Load Progression

516 ms
1.0 s
1.5 s
2.1 s
2.6 s
3.1 s
3.6 s
4.1 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
8.1 MB transferred, 68 requests
FIX
8.1 MB transferred, 68 requests
Critical::
Page weighs 12.1 MB (8.1 MB transferred)
Info::
Fonts are 6.7 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 6.7 MB
Warning::
JavaScript is 886 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 886 KB
Info::
CSS is 386 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 386 KB
Info::
68 HTTP requests
Info::
Estimated 1.7 g CO2 per page load
8.1 MB / 2.4 MB budget
8.1 MB transferred
68 requests
1.7 g CO2 per page load
Fonts 6.7 MiB 83%
JavaScript 886.4 KiB 11%
CSS 385.6 KiB 5%
Images 63.4 KiB 1%
Other 46.5 KiB 1%
HTML 33.4 KiB 0%
Other 4.8 KiB 0%
Other 2.2 KiB 0%
0 2.4 MB 4.9 MB
Over budget

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

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.

Why this matters

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.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (8.1 MiB of 8.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
7482ms total JS execution
FIX
7482ms total JS execution
Warning::
https://www.blackrock.com/tw: 1588ms CPU time
Warning::
https://www.blackrock.com/vGiSZvKzcsfCP/giHHrQ9of/...: 1369ms CPU time
Warning::
Unattributable: 1354ms CPU time
Warning::
https://sourcedefense.blackrock.com/cdncch/vice_lo...: 640ms CPU time
Warning::
https://www.blackrock.com/apac-retail-c-assets/inc...: 569ms CPU time
Warning::
Third-party scripts: 7482ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Style & Layout 25% Other 15% Script Parsing & Compilation 6% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.blackrock.com/tw1588ms26ms8ms3rd
https://www.blackrock.com/vGiSZvKzcsfCP/giHHrQ9of/uJXjw/fcN3DJiN/bx5eaywUEwE/LVNAEmhu/c3MPAg?v=5301bd93-b9ad-79d9-8d23-b3e25fc9172c1369ms1228ms78ms3rd
Unattributable1354ms312ms0ms3rd
https://sourcedefense.blackrock.com/cdncch/vice_loader/blackrock/blackrockprod640ms556ms18ms3rd
https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-aaa34762c4015c12dbf7c2d6883709c8.js569ms444ms47ms3rd
https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js492ms291ms70ms3rd
https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-ff0c766f3b5d322e3d21bf41ecd584ab.js418ms78ms40ms3rd
https://tags.tiqcdn.com/utag/blackrock/main/prod/utag.js387ms117ms53ms3rd
https://services.sdiapi.com/bolt/1.0.3.3/bolt.js193ms179ms9ms3rd
https://www.blackrock.com/akam/13/5417da3b166ms155ms7ms3rd

Showing top 10 of 14 scripts

D
JS Bundles
Action
28 scripts, 397 KB unused
FIX
28 scripts, 397 KB unused
Warning::
https://www.blackrock.com/apac-retail-c-assets/inc...: 94 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202601.2...: 68 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.blackrock.com/apac-retail-c-assets/inc...: 68 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://tags.tiqcdn.com/utag/blackrock/main/prod/u...: 64 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://sourcedefense.blackrock.com/cdncch/vice_re...: 43 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 397 KB
397 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-aaa34762c4015c12dbf7c2d6883709c8.js129 KB94 KB (73%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js128 KB68 KB (53%)✓3rd
https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-ff0c766f3b5d322e3d21bf41ecd584ab.js109 KB68 KB (62%)✓3rd
https://tags.tiqcdn.com/utag/blackrock/main/prod/utag.js92 KB64 KB (70%)✓3rd
https://sourcedefense.blackrock.com/cdncch/vice_release/1.23.9.358 KB43 KB (75%)✓3rd
https://www.blackrock.com/vGiSZvKzcsfCP/giHHrQ9of/uJXjw/fcN3DJiN/bx5eaywUEwE/LVNAEmhu/c3MPAg?v=5301bd93-b9ad-79d9-8d23-b3e25fc9172c156 KB31 KB (20%)✓3rd
https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-e4aa278323a058f5ccd4b4a3eb99c441.js33 KB29 KB (89%)✓3rd
https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-c5f6630e099a3f93beaabda725787aae.js1 KB—✓3rd
https://www.blackrock.com/akam/13/5417da3b9 KB—✓3rd
https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-767f4dffab4f6ee67fb69a31e76f6a19.js2 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

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

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

D
Page Weight Inventory
Action
68 resources · 8.1 MB · 397 KB savings available
FIX
68 resources · 8.1 MB · 397 KB savings available
Warning::
Page weight 7.1 MB over 1MB target
Got: 8.1 MB Expected: ≤ 1 MB
Info::
~397 KB of savings available
Warning::
67 third-party resources (100% of weight)
Info::
5 resources over 200KB
68 resources · 8.1 MiB · 67 third-party 7.1 MiB over 1MB target
Font 83% · 6.7 MiB
JavaScript 11% · 886.4 KiB
CSS 5% · 390.3 KiB
Image 1% · 64.6 KiB
Other 1% · 47.0 KiB
Document 0% · 33.9 KiB

~397.1 KiB of savings available

Remove unused JavaScript: 397.1 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
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.

C
Image Optimization
Action
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Warning::
https://www.blackrock.com/apac-retail-c-assets/cac... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
10 images 63 KB
0 oversized -0 KB
6 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
11 fonts (6865 KB)
PASS
11 fonts (6865 KB)
Info::
11 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

11

6865 KB total

Render-blocking

0

of 11

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s FCP 5.6 s LCP 42.6 shttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-solid-900.woff2fa-solid-900.woff2 https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-solid-900.woff2 — 138.8 KiB — 41 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-regular-400.woff2fa-regular-400.woff2 https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-regular-400.woff2 — 170.8 KiB — 109 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-light-300.woff2fa-light-300.woff2 https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-light-300.woff2 — 186.6 KiB — 109 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v4-Regular.woff2noto-sans-tc-v4-Regular... https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v4-Regular.woff2 — 1.4 MiB — 258 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v11-700.woff2noto-sans-tc-v11-700.woff2 https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v11-700.woff2 — 1.5 MiB — 360 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/blk-fort/BLKFort-Extrabold.woff2BLKFort-Extrabold.woff2 https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/blk-fort/BLKFort-Extrabold.woff2 — 48.5 KiB — 28 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v11-700.woffnoto-sans-tc-v11-700.woff https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v11-700.woff — 1.6 MiB — 230 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v4-Regular.woffnoto-sans-tc-v4-Regular... https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v4-Regular.woff — 1.6 MiB — 312 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/blk-fort/BLKFort-Bold.woff2BLKFort-Bold.woff2 https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/blk-fort/BLKFort-Bold.woff2 — 47.4 KiB — 182 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-brands-400.woff2fa-brands-400.woff2 https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-brands-400.woff2 — 75.3 KiB — 163 ms — font-display: swaphttps://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/blk-fort/BLKFort-Book.woff2BLKFort-Book.woff2 https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/blk-fort/BLKFort-Book.woff2 — 45.5 KiB — 25 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 139 KB
Load time 41 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-regular-400.woff2 woff2 swap
Size 171 KB
Load time 109 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-light-300.woff2 woff2 swap
Size 187 KB
Load time 109 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
noto-sans-tc-v4-Regular... woff2 swap
Size 1408 KB
Load time 258 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
noto-sans-tc-v11-700.woff2 woff2 swap
Size 1489 KB
Load time 360 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
BLKFort-Extrabold.woff2 woff2 swap
Size 49 KB
Load time 28 ms
Start 2.1 s
Risk FOUT — text flashes from fallback to web font
noto-sans-tc-v11-700.woff woff swap
Size 1664 KB
Load time 230 ms
Start 2.1 s
Risk FOUT — text flashes from fallback to web font
  • 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
noto-sans-tc-v4-Regular... woff swap
Size 1591 KB
Load time 312 ms
Start 2.1 s
Risk FOUT — text flashes from fallback to web font
  • 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
BLKFort-Bold.woff2 woff2 swap
Size 47 KB
Load time 182 ms
Start 2.1 s
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 75 KB
Load time 163 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
BLKFort-Book.woff2 woff2 swap
Size 46 KB
Load time 25 ms
Start 3.1 s
Risk FOUT — text flashes from fallback to web font
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 ~4301 KB and ~8602 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
6 hints, 0 missing preconnects
PASS
6 hints, 0 missing preconnects
Info::
Page uses 6 resource hint(s)

Current Resource Hints

preconnect
—
preload
6
dns-prefetch
—
prefetch
—

6 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
68 requests over 5968ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s FCP 5.6 s LCP 42.6 shttps://blackrock.com// https://blackrock.com/ — 301 — 130 B — 917 ms — http/1.0https://www.blackrock.com/www.blackrock.com/ https://www.blackrock.com/ — 301 — 1.4 KiB — 52 ms — h2https://www.blackrock.com/twwww.blackrock.com/tw https://www.blackrock.com/tw — 200 — 32.5 KiB — 525 ms — h2https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-solid-900.woff2www.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-solid-900.woff2 — 200 — 138.8 KiB — 41 ms — h2https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-regular-400.woff2www.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-regular-400.woff2 — 200 — 170.8 KiB — 109 ms — h2https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-light-300.woff2www.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/fontawesome-5pro/fa-light-300.woff2 — 200 — 186.6 KiB — 109 ms — h2https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v4-Regular.woff2www.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v4-Regular.woff2 — 200 — 1.4 MiB — 258 ms — h2https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v11-700.woff2www.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/cache-1776242861000/include/common/fonts/hongkong/noto-sans-tc-v11-700.woff2 — 200 — 1.5 MiB — 360 ms — h2https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-ce3a0160b7509405717bc7daeb7c497f.csswww.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-ce3a0160b7509405717bc7daeb7c497f.css — 200 — 13.3 KiB — 74 ms — h2https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-b81a4815cd7b4aa972a70f2b470f50cf.csswww.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-b81a4815cd7b4aa972a70f2b470f50cf.css — 200 — 65.2 KiB — 35 ms — h2https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-1b4c10cff99dc0451fec53de4d885756.csswww.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-1b4c10cff99dc0451fec53de4d885756.css — 200 — 78.9 KiB — 43 ms — h2https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-2cff407f4e5d337eafc3149bba9b6a.csswww.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-2cff407f4e5d337eafc3149bba9b6a.css — 200 — 204.2 KiB — 75 ms — h2https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-3483f3860b33bc9482b55413fffa7c74.csswww.blackrock.com/apac-retail-c-ass... https://www.blackrock.com/apac-retail-c-assets/include/bundles/minified-3483f3860b33bc9482b55413fffa7c74.css — 200 — 23.9 KiB — 40 ms — h2https://sourcedefense.blackrock.com/cdncch/vice_loader/blackrock/blackrockprodsourcedefense.blackrock.com/cdncch/... https://sourcedefense.blackrock.com/cdncch/vice_loader/blackrock/blackrockprod — 200 — 38.5 KiB — 284 ms — h2https://www.blackrock.com/apac-retail-c-assets/cache-1558532803000/images/media-bin/web/global/wordmark/blackrock-tc-logo-main-nav-153x53.svgwww.blackrock.com/apac-retail-c-ass... 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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 7482ms · 797KB · $99/mo
www.blackrock.com
Other
Costly
Execution 1588ms
Transfer 32 KB
Monthly Cost $21/mo
www.blackrock.com
Other
Costly
Execution 1369ms
Transfer 156 KB
Unused 20%
Monthly Cost $18/mo
Unattributable
Other
Costly
Execution 1354ms
Transfer 0 KB
Monthly Cost $18/mo
sourcedefense.blackrock.com
Other
Costly
Execution 640ms
Transfer 39 KB
Monthly Cost $8/mo
www.blackrock.com
Other
Costly
Execution 569ms
Transfer 129 KB
Unused 73%
Monthly Cost $8/mo
OneTrust
Consent
Essential
Execution 492ms
Transfer 128 KB
Unused 53%
Monthly Cost $7/mo
www.blackrock.com
Other
Costly
Execution 418ms
Transfer 109 KB
Unused 62%
Monthly Cost $6/mo
tags.tiqcdn.com
Other
Costly
Execution 387ms
Transfer 92 KB
Unused 70%
Monthly Cost $5/mo
services.sdiapi.com
Other
Optional
Execution 193ms
Transfer 18 KB
Monthly Cost $3/mo
www.blackrock.com
Other
Optional
Execution 166ms
Transfer 9 KB
Monthly Cost $2/mo
www.blackrock.com
Other
Optional
Execution 116ms
Transfer 4 KB
Monthly Cost $2/mo
www.blackrock.com
Other
Optional
Execution 65ms
Transfer 12 KB
Monthly Cost $1/mo
sourcedefense.blackrock.com
Other
Optional
Execution 64ms
Transfer 58 KB
Unused 75%
Monthly Cost $1/mo
OneTrust
Consent
Essential
Execution 62ms
Transfer 9 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.blackrock.com adds 1588ms and costs ~$21/month
  • www.blackrock.com adds 1369ms and costs ~$18/month
  • Unattributable adds 1354ms and costs ~$18/month
  • sourcedefense.blackrock.com adds 640ms and costs ~$8/month
  • www.blackrock.com adds 569ms and costs ~$8/month
  • www.blackrock.com adds 418ms and costs ~$6/month
  • tags.tiqcdn.com adds 387ms and costs ~$5/month

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

www.blackrock.com takes 1588ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.blackrock.com takes 1369ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 1354ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

sourcedefense.blackrock.com takes 640ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.blackrock.com takes 569ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

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.

Why this matters

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.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

www.blackrock.com takes 418ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

62% of www.blackrock.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

tags.tiqcdn.com takes 387ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

70% of tags.tiqcdn.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

75% of sourcedefense.blackrock.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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.

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