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.
1.59 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.87 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
20 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.
2.10 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.
4.60 s
Page Load Progression
936 ms
1.9 s
2.8 s
3.7 s
4.7 s 5.6 s
6.6 s
7.5 sFPage Weight BudgetAction16.8 MB transferred, 235 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
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
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
DJS BundlesAction101 scripts, 319 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://otter.chilipiper.com/chat/embed/assets/masterChefUrl-DxJcY8jE.js | 109 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://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 (73%) | ✓ | 3rd |
| https://js.driftt.com/core/assets/js/40.b61e7e74.chunk.js | 10 KB | — | ✓ | 3rd |
| https://js.driftt.com/core/assets/js/53.d05eba0a.chunk.js | 34 KB | — | ✓ | 3rd |
| https://cdn.prod.website-files.com/618e9316785b3582a5178502/js/otterai-website.schunk.36b8fb49256177c8.js | 14 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 InventoryAction235 resources · 16.8 MB · 319 KB savings availableFIX
~319.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 235 resources | 16.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction57 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.
CJS Execution CostAction1895ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://cdn.prod.website-files.com/618e9316785b3582a5178502/js/otterai-website.schunk.673ee5f24c0a704b.js | 660ms | 83ms | 10ms | 3rd |
| https://otter.ai/ | 469ms | 54ms | 6ms | 1st |
| Unattributable | 384ms | 51ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-M866M5H | 111ms | 84ms | 24ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-F0G9HT49XE&cx=c>m=4e64k1 | 103ms | 90ms | 11ms | 3rd |
| https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/gsap.min.js | 62ms | 57ms | 2ms | 3rd |
| https://js.driftt.com/include/1776902400000/c2ban487bwvc.js | 54ms | 50ms | 4ms | 3rd |
| https://cdn.jsdelivr.net/npm/swiper@10/swiper-bundle.min.js | 52ms | 38ms | 3ms | 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 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 HintsNo optimization neededPASS
Network Waterfall235 requests over 7278msINFO
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 | 660ms | 59 KB | — | CA$9/mo | Costly |
Unattributable Unattributable | Other | 384ms | 0 KB | — | CA$5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 111ms | 175 KB | 40% | CA$2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 103ms | 179 KB | 36% | CA$1/mo | Optional |
jsDelivr cdn.jsdelivr.net | CDN | 62ms | 29 KB | — | CA$1/mo | Optional |
Drift js.driftt.com | Chat | 54ms | 63 KB | 53% | CA$1/mo | Optional |
jsDelivr cdn.jsdelivr.net | CDN | 52ms | 40 KB | — | CA$1/mo | Optional |
These scripts may cost more than they're worth
- cdn.prod.website-files.com adds 660ms and costs ~CA$9/month
- Unattributable adds 384ms and costs ~CA$5/month
75% 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 660ms 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 384ms 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