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.
866 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.81 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
178 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.087
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.14 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.
9.00 s
Page Load Progression
FPage Weight BudgetAction15.4 MB transferred, 98 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2375ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://players.brightcove.net/800000612001/zgcyiKu6s_default/index.min.js | 813ms | 497ms | 45ms | 3rd |
| Unattributable | 440ms | 56ms | 0ms | 3rd |
| https://www.boeing.com/ | 360ms | 10ms | 1ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T6NQQT | 290ms | 187ms | 81ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MH9RR8X>m=4e64h1h1 | 160ms | 136ms | 19ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otBannerSdk.js | 143ms | 94ms | 25ms | 3rd |
| https://www.boeing.com/etc.clientlibs/theboeingcompany/clientlibs/clientlib-version2.min.js | 87ms | 66ms | 6ms | 3rd |
| https://www.boeing.com/etc.clientlibs/core/wcm/components/commons/datalayer/v2/clientlibs/core.wcm.components.commons.datalayer.v2.min.js | 82ms | 77ms | 0ms | 3rd |
FJS BundlesAction21 scripts, 459 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://players.brightcove.net/800000612001/zgcyiKu6s_default/index.min.js | 295 KB | 129 KB (44%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T6NQQT | 181 KB | 77 KB (42%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otBannerSdk.js | 124 KB | 66 KB (53%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MH9RR8X>m=4e64h1h1 | 141 KB | 62 KB (44%) | ✓ | 3rd |
| https://www.boeing.com/etc.clientlibs/theboeingcompany/components/card-carousel/clientlibs/swiper.min.js | 63 KB | 41 KB (65%) | ✗ | 3rd |
| https://www.boeing.com/etc.clientlibs/theboeingcompany/clientlibs/clientlib-bootstrap.min.js | 44 KB | 33 KB (76%) | ✗ | 3rd |
| https://www.boeing.com/etc.clientlibs/theboeingcompany/clientlibs/clientlib-version2.min.js | 51 KB | 31 KB (63%) | ✓ | 3rd |
| https://www.boeing.com/etc.clientlibs/theboeingcompany/clientlibs/clientlib-jquery.min.js | 31 KB | 22 KB (71%) | ✓ | 3rd |
| https://www.boeing.com/etc.clientlibs/core/wcm/components/commons/site/clientlibs/container.min.js | 1 KB | — | ✓ | 3rd |
| https://www.boeing.com/etc.clientlibs/core/wcm/components/commons/datalayer/acdl/core.wcm.components.commons.datalayer.acdl.min.js | 12 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
FPage Weight InventoryAction98 resources · 15.4 MB · 459 KB savings availableFIX
~459.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 98 resources | 15.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction43 images, 0 KB saveableREVIEW
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
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
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 Loading6 fonts (4561 KB)PASS
Web fonts
6
4561 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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
- 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
- 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)
Fixing the unchecked items could save ~2298 KB and ~4596 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall98 requests over 3745msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
players.brightcove.net players.brightcove.net | Other | 813ms | 295 KB | 44% | $11/mo | Costly |
Unattributable Unattributable | Other | 440ms | 0 KB | — | $6/mo | Costly |
www.boeing.com www.boeing.com | Other | 360ms | 31 KB | — | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 290ms | 181 KB | 42% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 160ms | 141 KB | 44% | $2/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 143ms | 124 KB | 53% | $2/mo | Essential |
www.boeing.com www.boeing.com | Other | 87ms | 51 KB | 63% | $1/mo | Optional |
www.boeing.com www.boeing.com | Other | 82ms | 1 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- players.brightcove.net adds 813ms and costs ~$11/month
- Unattributable adds 440ms and costs ~$6/month
- www.boeing.com adds 360ms and costs ~$5/month
- Google Tag Manager adds 290ms and costs ~$4/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
players.brightcove.net takes 813ms 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 440ms 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.boeing.com takes 360ms 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
Google Tag Manager takes 290ms 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 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
63% of www.boeing.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