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.
1.93 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.48 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
132 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.022
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.46 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.
4.47 s
Page Load Progression
FPage Weight BudgetAction5.0 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
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 ImpactAction99% third-party, 0 ms blockingFIX
FJS BundlesAction14 scripts, 614 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://chatbot.rc3.ring.com/index.4e83e948.js | 632 KB | 358 KB (57%) | ✓ | 3rd |
| https://d39xvdj9d5ntm1.cloudfront.net/common/js/ring.min-935eb1ea8607272fc9da58ebc811dec2.js | 269 KB | 195 KB (73%) | ✓ | 3rd |
| https://d2a12jsx2jznj5.cloudfront.net/globalnav.min.js | 84 KB | 35 KB (42%) | ✓ | 3rd |
| https://chatbot.rc3.ring.com/js/1.0.8.js | 78 KB | 25 KB (33%) | ✓ | 3rd |
| https://d39xvdj9d5ntm1.cloudfront.net/common/js/ct_50-50_image_gallery_block-055fdc61a0346e79885221cd58055ad9.js | 10 KB | — | ✓ | 3rd |
| https://d39xvdj9d5ntm1.cloudfront.net/common/js/ct_productdetail-1e81f502aaa28fe0876645d15b6652d0.js | 9 KB | — | ✓ | 3rd |
| https://d39xvdj9d5ntm1.cloudfront.net/common/js/consent-manager-762fe7c2fc4b0df8660d5f3b736035f0.js?locale=en-US&local=true&loggedIn=0®ion=us | 9 KB | — | ✓ | 3rd |
| https://d39xvdj9d5ntm1.cloudfront.net/common/js/ct_product-wrapper-99c92507072b895c71cde130531f89e7.js | 3 KB | — | ✓ | 3rd |
| https://d39xvdj9d5ntm1.cloudfront.net/common/js/ct_slider-wrapper-28e2487694f2833ab4d4564fafdae49a.js | 3 KB | — | ✓ | 3rd |
| https://ring.com/partials/consent/en-US/strings.json?callback=ringconsent_0 | 5 KB | — | ✓ | 1st |
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 · 5.0 MB · 614 KB savings availableFIX
~613.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 98 resources | 5.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction56 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
CJS Execution CostAction1173ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://ring.com/ | 309ms | 7ms | 11ms | 1st |
| https://chatbot.rc3.ring.com/index.4e83e948.js | 261ms | 177ms | 76ms | 3rd |
| Unattributable | 233ms | 86ms | 0ms | 3rd |
| https://d2a12jsx2jznj5.cloudfront.net/globalnav.min.js | 192ms | 172ms | 10ms | 3rd |
| https://d39xvdj9d5ntm1.cloudfront.net/common/js/ring.min-935eb1ea8607272fc9da58ebc811dec2.js | 117ms | 74ms | 36ms | 3rd |
| https://chatbot.rc3.ring.com/js/1.0.8.js | 60ms | 51ms | 8ms | 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 Loading4 fonts (168 KB)PASS
Web fonts
4
168 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
Network Waterfall98 requests over 2926msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
chatbot.rc3.ring.com chatbot.rc3.ring.com | Other | 261ms | 632 KB | 57% | €1/mo | Costly |
Unattributable Unattributable | Other | 233ms | 0 KB | — | €1/mo | Costly |
d2a12jsx2jznj5.cloudfront.net d2a12jsx2jznj5.cloudfront.net | Other | 192ms | 84 KB | 42% | €1/mo | Optional |
d39xvdj9d5ntm1.cloudfront.net d39xvdj9d5ntm1.cloudfront.net | Other | 117ms | 269 KB | 73% | €1/mo | Optional |
chatbot.rc3.ring.com chatbot.rc3.ring.com | Other | 60ms | 78 KB | 33% | €0/mo | Optional |
These scripts may cost more than they're worth
- chatbot.rc3.ring.com adds 261ms and costs ~€1/month
- Unattributable adds 233ms and costs ~€1/month
74% 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
chatbot.rc3.ring.com takes 261ms 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
57% of chatbot.rc3.ring.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
Unattributable takes 233ms 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 d39xvdj9d5ntm1.cloudfront.net'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