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.
1.39 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.10 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
10 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.
2.36 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.
5.11 s
Page Load Progression
DPage Weight BudgetAction2.2 MB transferred, 187 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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction187 resources · 2.2 MB · 300 KB savings availableFIX
~299.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 187 resources | 2.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization62 images, 0 KB saveableREVIEW
CJS Execution CostAction1199ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 364ms | 13ms | 0ms | 3rd |
| https://investor.vanguard.com/Bha_qqRjl9DtW1P6UA/7LYhLcumOYr7Nz/WiUKVjkHAQ/cQIJaCFM/ChQB | 226ms | 207ms | 10ms | 3rd |
| https://dxa.cdn.web.vanguard.com/pi/prod/dxa.js | 164ms | 147ms | 4ms | 3rd |
| https://corp-etm-arl.web.vanguard.com/personal_investor_prd/379f26abac75/9fc4b472fc7d/launch-e4739f08c463.min.js | 147ms | 121ms | 18ms | 3rd |
| https://investor.vanguard.com/corporate-portal | 101ms | 5ms | 0ms | 3rd |
| https://mdl-medallia-digital.vanguard.com/pkg/1.0.0/web/external_libs/wdcusprem/2940/onsite/generic1772008099417.js | 71ms | 50ms | 8ms | 3rd |
| https://corp-pmj.web.vanguard.com/files/us_b2c/cc/prod/onetrust/scripttemplates/202402.1.0/otBannerSdk.js | 66ms | 47ms | 13ms | 3rd |
| https://investor.vanguard.com/corporate-portal/_next/static/chunks/framework-b1e5f14688f9ffe6.js | 60ms | 35ms | 5ms | 3rd |
CJS BundlesAction52 scripts, 300 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=DC-12332392&l=googleDataLayer | 131 KB | 61 KB (46%) | ✓ | 3rd |
| https://corp-pmj.web.vanguard.com/files/us_b2c/cc/prod/onetrust/scripttemplates/202402.1.0/otBannerSdk.js | 106 KB | 59 KB (56%) | ✓ | 3rd |
| https://mdl-medallia-digital.vanguard.com/pkg/1.0.0/web/external_libs/wdcusprem/2940/onsite/generic1772008099417.js | 62 KB | 39 KB (63%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 37 KB (38%) | ✓ | 3rd |
| https://investor.vanguard.com/Bha_qqRjl9DtW1P6UA/7LYhLcumOYr7Nz/WiUKVjkHAQ/cQIJaCFM/ChQB | 180 KB | 37 KB (21%) | ✓ | 3rd |
| https://dxa.cdn.web.vanguard.com/pi/prod/dxa.js | 67 KB | 25 KB (37%) | ✓ | 3rd |
| https://investor.vanguard.com/corporate-portal/_next/static/chunks/framework-b1e5f14688f9ffe6.js | 57 KB | 22 KB (39%) | ✓ | 3rd |
| https://corp-etm-arl.web.vanguard.com/personal_investor_prd/379f26abac75/9fc4b472fc7d/launch-e4739f08c463.min.js | 112 KB | 21 KB (19%) | ✓ | 3rd |
| https://corp-etm-arl.web.vanguard.com/personal_investor_prd/379f26abac75/9fc4b472fc7d/2916133dc13d/RC8256ad6d0eaa417487be6509107743d7-source.min.js | 1 KB | — | ✓ | 3rd |
| https://www.googleadservices.com/pagead/conversion/11250186395/?random=1776895814561&cv=9&fst=1776895814561&num=1&npa=1&label=fDbTCOiqk7gYEJvxwPQp&guid=ON&resp=GooglemKTybQhCsO&eid=375603260%2C466465925%2C512247838%2C658953496&u_h=600&u_w=800&ig=1&auid=716936927.1776895814&frm=0&url=https%3A%2F%2Finvestor.vanguard.com%2Fcorporate-portal&tiba=Mutual%20funds%2C%20IRAs%2C%20ETFs%2C%20401(k)%20plans%2C%20and%20more%20%7C%20Vanguard&capi=1&hn=www.googleadservices.com&uaa=x86&uab=64&uam=&uap=macOS&uapv=10.15.7&uaw=0&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&rfmt=3&fmt=4 | 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
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 (156 KB)PASS
Web fonts
4
156 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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
Network Waterfall187 requests over 10754msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 364ms | 0 KB | — | $5/mo | Costly |
investor.vanguard.com investor.vanguard.com | Other | 226ms | 1 KB | 21% | $3/mo | Costly |
dxa.cdn.web.vanguard.com dxa.cdn.web.vanguard.com | Other | 164ms | 67 KB | 37% | $2/mo | Optional |
corp-etm-arl.web.vanguard.com corp-etm-arl.web.vanguard.com | Other | 147ms | 112 KB | 19% | $2/mo | Optional |
investor.vanguard.com investor.vanguard.com | Other | 101ms | 8 KB | — | $1/mo | Optional |
mdl-medallia-digital.vanguard.com mdl-medallia-digital.vanguard.com | Other | 71ms | 62 KB | 63% | $1/mo | Optional |
corp-pmj.web.vanguard.com corp-pmj.web.vanguard.com | Other | 66ms | 106 KB | 56% | $1/mo | Optional |
investor.vanguard.com investor.vanguard.com | Other | 60ms | 57 KB | 39% | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 364ms and costs ~$5/month
- investor.vanguard.com adds 226ms and costs ~$3/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 364ms 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
investor.vanguard.com takes 226ms 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
63% of mdl-medallia-digital.vanguard.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
56% of corp-pmj.web.vanguard.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