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.
2.98 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.59 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
550 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.017
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.48 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.
19.09 s
Page Load Progression
956 ms
1.9 s
2.9 s
3.8 s
4.8 s 5.7 s
6.7 s
7.6 sFPage Weight BudgetAction18.1 MB transferred, 246 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
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
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 CostAction9206ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://cdn.prod.website-files.com/618e9316785b3582a5178502/js/otterai-website.schunk.673ee5f24c0a704b.js | 2859ms | 343ms | 37ms | 3rd |
| https://otter.ai/ | 1958ms | 159ms | 20ms | 1st |
| Unattributable | 1685ms | 256ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-F0G9HT49XE&cx=c>m=4e64k1 | 403ms | 355ms | 42ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-M866M5H | 355ms | 250ms | 56ms | 3rd |
| https://js.driftt.com/include/1776902400000/c2ban487bwvc.js | 316ms | 281ms | 17ms | 3rd |
| https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/gsap.min.js | 245ms | 225ms | 5ms | 3rd |
| https://cdn.amplitude.com/libs/marketing-analytics-browser-0.3.2-min.js.gz | 211ms | 200ms | 9ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202403.2.0/otBannerSdk.js | 209ms | 131ms | 35ms | 3rd |
| https://cdn.jsdelivr.net/npm/swiper@10/swiper-bundle.min.js | 205ms | 155ms | 10ms | 3rd |
Showing top 10 of 17 scripts
DJS BundlesAction102 scripts, 377 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://otter.chilipiper.com/chat/embed/assets/masterChefUrl-DxJcY8jE.js | 108 KB | 78 KB (72%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-M866M5H | 175 KB | 70 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-F0G9HT49XE&cx=c>m=4e64k1 | 179 KB | 65 KB (36%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202403.2.0/otBannerSdk.js | 109 KB | 58 KB (54%) | ✓ | 3rd |
| https://js.driftt.com/include/1776902400000/c2ban487bwvc.js | 63 KB | 33 KB (53%) | ✓ | 3rd |
| https://otter.chilipiper.com/web-data/embed/index.js | 37 KB | 26 KB (70%) | ✓ | 3rd |
| https://cdn.vector.co/pixel.js | 59 KB | 25 KB (43%) | ✓ | 3rd |
| https://otter.chilipiper.com/chat/embed/assets/index.js | 36 KB | 23 KB (72%) | ✓ | 3rd |
| https://js.driftt.com/core/assets/js/runtime~main.ed756b21.js | 0 KB | — | ✓ | 3rd |
| https://js.driftt.com/core/assets/js/16.44924e69.chunk.js | 10 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
DPage Weight InventoryAction246 resources · 18.1 MB · 377 KB savings availableFIX
~377.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 246 resources | 18.1 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction60 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.
Performance issues directly impact user engagement and conversion rates.
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 Loading5 fonts (205 KB)PASS
Web fonts
5
205 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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 ~51 KB and ~102 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints8 hints, 0 missing preconnectsPASS
Current Resource Hints
8 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall246 requests over 7602msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.prod.website-files.com cdn.prod.website-files.com | Other | 2859ms | 59 KB | — | CA$40/mo | Costly |
Unattributable Unattributable | Other | 1685ms | 0 KB | — | CA$23/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 403ms | 179 KB | 36% | CA$6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 355ms | 175 KB | 40% | CA$5/mo | Costly |
Drift js.driftt.com | Chat | 316ms | 63 KB | 53% | CA$4/mo | Costly |
jsDelivr cdn.jsdelivr.net | CDN | 245ms | 29 KB | — | CA$3/mo | Costly |
Amplitude cdn.amplitude.com | Analytics | 211ms | 23 KB | — | CA$3/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 209ms | 109 KB | 54% | CA$3/mo | Essential |
jsDelivr cdn.jsdelivr.net | CDN | 205ms | 40 KB | — | CA$3/mo | Costly |
cdn.vector.co cdn.vector.co | Other | 201ms | 59 KB | 43% | CA$3/mo | Costly |
cdn.prod.website-files.com cdn.prod.website-files.com | Other | 145ms | 1 KB | — | CA$2/mo | Optional |
d3e54v103j8qbb.cloudfront.net d3e54v103j8qbb.cloudfront.net | Other | 139ms | 31 KB | — | CA$2/mo | Optional |
otter.chilipiper.com otter.chilipiper.com | Other | 82ms | 37 KB | 70% | CA$1/mo | Optional |
jsDelivr cdn.jsdelivr.net | CDN | 75ms | 18 KB | — | CA$1/mo | Optional |
otter.chilipiper.com otter.chilipiper.com | Other | 67ms | 36 KB | 72% | CA$1/mo | Optional |
cdn.cr-relay.com cdn.cr-relay.com | Other | 51ms | 7 KB | — | CA$1/mo | Optional |
These scripts may cost more than they're worth
- cdn.prod.website-files.com adds 2859ms and costs ~CA$40/month
- Unattributable adds 1685ms and costs ~CA$23/month
- Google Tag Manager adds 403ms and costs ~CA$6/month
- Google Tag Manager adds 355ms and costs ~CA$5/month
- Drift adds 316ms and costs ~CA$4/month
- jsDelivr adds 245ms and costs ~CA$3/month
- Amplitude adds 211ms and costs ~CA$3/month
- jsDelivr adds 205ms and costs ~CA$3/month
- cdn.vector.co adds 201ms and costs ~CA$3/month
79% 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
cdn.prod.website-files.com takes 2859ms 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 1685ms 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 403ms 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 355ms 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
Drift takes 316ms 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 Drift'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
jsDelivr takes 245ms 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
Amplitude takes 211ms 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 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
jsDelivr takes 205ms 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.vector.co takes 201ms 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
70% of otter.chilipiper.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
72% of otter.chilipiper.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