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.
4.71 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.47 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5.06 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.120
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.85 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.
21.97 s
Page Load Progression
594 ms 1.2 s
1.8 s
2.4 s
3.0 s 3.6 s
4.2 s
4.8 sDPage Weight BudgetAction2.2 MB transferred, 158 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
FJS Execution CostAction10482ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-53KHTQK | 4809ms | 4475ms | 117ms | 3rd |
| https://www.digikey.com/ | 1165ms | 56ms | 10ms | 3rd |
| Unattributable | 1063ms | 28ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-0434Z4NCVG&cx=c>m=4e64k1h2 | 502ms | 400ms | 73ms | 3rd |
| https://info.digikey.com/js/forms2/js/forms2.min.js | 447ms | 330ms | 57ms | 3rd |
| https://sc-a.digikeyassets.com/-/media/Designer/Homepage%202021/JS/homepage.js?la=en&ts=160e5d2c-3b78-4481-b647-2f8ed3145b46 | 398ms | 238ms | 2ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-987442776&cx=c>m=4e64k1h2 | 324ms | 265ms | 55ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-986885005&cx=c>m=4e64k1h2 | 277ms | 217ms | 54ms | 3rd |
| https://cdn.sift.com/s.js | 243ms | 229ms | 8ms | 3rd |
| https://cdn.evgnet.com/beacon/digikey/production/scripts/evergage.min.js | 194ms | 132ms | 56ms | 3rd |
Showing top 10 of 20 scripts
FJS BundlesAction38 scripts, 648 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.evgnet.com/beacon/digikey/production/scripts/evergage.min.js | 123 KB | 82 KB (67%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otBannerSdk.js | 124 KB | 78 KB (63%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-987442776&cx=c>m=4e64k1h2 | 145 KB | 70 KB (49%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-986885005&cx=c>m=4e64k1h2 | 136 KB | 67 KB (50%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-0434Z4NCVG&cx=c>m=4e64k1h2 | 161 KB | 66 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-53KHTQK | 214 KB | 54 KB (25%) | ✓ | 3rd |
| https://www.digikey.com/-/digit/global.min.js?v=1.0.5 | 63 KB | 51 KB (82%) | ✓ | 3rd |
| https://digikey.egain.cloud/system/templates/chat/egain-docked-chat.js | 57 KB | 49 KB (87%) | ✗ | 3rd |
| https://info.digikey.com/js/forms2/js/forms2.min.js | 0 KB | 36 KB (54%) | ✓ | 3rd |
| https://info.digikey.com/js/forms2/js/forms2.min.js | 67 KB | 36 KB (54%) | ✓ | 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 InventoryAction158 resources · 2.2 MB · 648 KB savings availableFIX
~648.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 158 resources | 2.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction81 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 Loading4 fonts (92 KB)PASS
Web fonts
4
92 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
Network Waterfall158 requests over 4709msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 4809ms | 214 KB | 25% | $64/mo | Costly |
www.digikey.com www.digikey.com | Other | 1165ms | 65 KB | — | $15/mo | Costly |
Unattributable Unattributable | Other | 1063ms | 0 KB | — | $14/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 502ms | 161 KB | 41% | $7/mo | Costly |
info.digikey.com info.digikey.com | Other | 447ms | 0 KB | 54% | $6/mo | Costly |
sc-a.digikeyassets.com sc-a.digikeyassets.com | Other | 398ms | 5 KB | — | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 324ms | 145 KB | 49% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 277ms | 136 KB | 50% | $4/mo | Costly |
cdn.sift.com cdn.sift.com | Other | 243ms | 20 KB | — | $3/mo | Costly |
cdn.evgnet.com cdn.evgnet.com | Other | 194ms | 123 KB | 67% | $3/mo | Optional |
www.datadoghq-browser-agent.com www.datadoghq-browser-agent.com | Other | 189ms | 52 KB | 58% | $3/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 173ms | 124 KB | 63% | $2/mo | Essential |
sc-a.digikeyassets.com sc-a.digikeyassets.com | Other | 153ms | 24 KB | — | $2/mo | Optional |
sc-b.digikeyassets.com sc-b.digikeyassets.com | Other | 105ms | 62 KB | 45% | $1/mo | Optional |
www.digikey.com www.digikey.com | Other | 96ms | 63 KB | 82% | $1/mo | Optional |
sc-a.digikeyassets.com sc-a.digikeyassets.com | Other | 95ms | 5 KB | — | $1/mo | Optional |
sc-c.digikeyassets.com sc-c.digikeyassets.com | Other | 86ms | 17 KB | — | $1/mo | Optional |
digikey.egain.cloud digikey.egain.cloud | Other | 60ms | 57 KB | 87% | $1/mo | Optional |
sc-c.digikeyassets.com sc-c.digikeyassets.com | Other | 54ms | 1 KB | — | $1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 52ms | 9 KB | — | $1/mo | Essential |
These scripts may cost more than they're worth
- Google Tag Manager adds 4809ms and costs ~$64/month
- www.digikey.com adds 1165ms and costs ~$15/month
- Unattributable adds 1063ms and costs ~$14/month
- Google Tag Manager adds 502ms and costs ~$7/month
- info.digikey.com adds 447ms and costs ~$6/month
- sc-a.digikeyassets.com adds 398ms and costs ~$5/month
- Google Tag Manager adds 324ms and costs ~$4/month
- Google Tag Manager adds 277ms and costs ~$4/month
- cdn.sift.com adds 243ms 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
Google Tag Manager takes 4809ms 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.digikey.com takes 1165ms 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 1063ms 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 502ms 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
info.digikey.com takes 447ms 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
54% of info.digikey.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
sc-a.digikeyassets.com takes 398ms 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 324ms 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 277ms 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
cdn.sift.com takes 243ms 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
67% of cdn.evgnet.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
58% of www.datadoghq-browser-agent.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
63% 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
82% of www.digikey.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
87% of digikey.egain.cloud'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