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Fix perf issue in collaboration section of landing page #3736

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Fix perf issue in collaboration section of landing page #3736

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d64ba6c
Update collaboration.tsx
ShoeBoom Mar 24, 2026
05df6c4
Update collaboration.tsx
ShoeBoom Mar 24, 2026
53a577f
Update collaboration.tsx
ShoeBoom Mar 24, 2026
bcfaf61
remove need for requestAnimationFrame based implementation
ShoeBoom Mar 24, 2026
83b5072
Update collaboration.tsx
ShoeBoom Mar 24, 2026
135edb4
Update collaboration.tsx
ShoeBoom Mar 24, 2026
c6c7c1c
format
ShoeBoom Mar 24, 2026
07c49a9
add transition-transform
ShoeBoom Mar 24, 2026
99ef9b7
Hide YouCursor when not visible using hidden class instead of returning
ShoeBoom Mar 24, 2026
8258b93
Add will-change-transform to YouCursor
ShoeBoom Mar 24, 2026
071fda5
remove transition-transform
ShoeBoom Mar 24, 2026
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Update collaboration.tsx
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@ShoeBoom
ShoeBoom committed Mar 24, 2026
commit d64ba6c3366aedae1c0b04d3adee432b222243c3
73 changes: 41 additions & 32 deletions apps/sim/app/(home)/components/collaboration/collaboration.tsx
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
'use client'

import { useCallback, useEffect, useRef, useState } from 'react'
import type { RefObject } from 'react'
import { useCallback, useLayoutEffect, useRef, useState } from 'react'
import Image from 'next/image'
import Link from 'next/link'
import { Badge, ChevronDown } from '@/components/emcn'
Expand Down Expand Up @@ -122,23 +123,18 @@ function AlexaCursor() {
}

interface YouCursorProps {
x: number
y: number
cursorRef: RefObject<HTMLDivElement | null>
visible: boolean
}

function YouCursor({ x, y, visible }: YouCursorProps) {
if (!visible) return null
const CURSOR_LERP_FACTOR = 0.3

function YouCursor({ cursorRef, visible }: YouCursorProps) {
return (
<div
ref={cursorRef}
aria-hidden='true'
className='pointer-events-none fixed z-50'
style={{
left: x,
top: y,
transform: 'translate(-2px, -2px)',
}}
className={`pointer-events-none fixed top-0 left-0 z-50 ${visible ? '' : 'hidden'}`}
>
<svg width='23.15' height='21.1' viewBox='0 0 17.5 16.4' fill='none'>
<path d={CURSOR_ARROW_MIRRORED_PATH} fill='#33C482' />
Expand All @@ -164,42 +160,57 @@ function YouCursor({ x, y, visible }: YouCursorProps) {
* - Reference "Sim" by name per capability ("Sim's real-time collaboration").
*/

const CURSOR_LERP_FACTOR = 0.3

export default function Collaboration() {
const [cursorPos, setCursorPos] = useState({ x: 0, y: 0 })
const [isHovering, setIsHovering] = useState(false)
const sectionRef = useRef<HTMLElement>(null)
const cursorRef = useRef<HTMLDivElement>(null)
const targetPos = useRef({ x: 0, y: 0 })
const animationRef = useRef<number>(0)
const currentPos = useRef({ x: 0, y: 0 })
const animationRef = useRef<number | null>(null)

useLayoutEffect(() => {
if (!isHovering) {
if (animationRef.current) {
cancelAnimationFrame(animationRef.current)
animationRef.current = null
}

return
}

useEffect(() => {
const animate = () => {
setCursorPos((prev) => ({
x: prev.x + (targetPos.current.x - prev.x) * CURSOR_LERP_FACTOR,
y: prev.y + (targetPos.current.y - prev.y) * CURSOR_LERP_FACTOR,
}))
currentPos.current = {
x: currentPos.current.x + (targetPos.current.x - currentPos.current.x) * CURSOR_LERP_FACTOR,
y: currentPos.current.y + (targetPos.current.y - currentPos.current.y) * CURSOR_LERP_FACTOR,
}

if (cursorRef.current) {
cursorRef.current.style.transform = `translate(${currentPos.current.x - 2}px, ${currentPos.current.y - 2}px)`
}

animationRef.current = requestAnimationFrame(animate)
}

if (isHovering) {
animationRef.current = requestAnimationFrame(animate)
if (cursorRef.current) {
cursorRef.current.style.transform = `translate(${currentPos.current.x - 2}px, ${currentPos.current.y - 2}px)`
}

animationRef.current = requestAnimationFrame(animate)

return () => {
if (animationRef.current) {
cancelAnimationFrame(animationRef.current)
animationRef.current = null
}
}
}, [isHovering])

const handleMouseMove = useCallback((e: React.MouseEvent) => {
targetPos.current = { x: e.clientX, y: e.clientY }
const handleMouseMove = useCallback((event: React.MouseEvent) => {
targetPos.current = { x: event.clientX, y: event.clientY }
}, [])

const handleMouseEnter = useCallback((e: React.MouseEvent) => {
targetPos.current = { x: e.clientX, y: e.clientY }
setCursorPos({ x: e.clientX, y: e.clientY })
const handleMouseEnter = useCallback((event: React.MouseEvent) => {
targetPos.current = { x: event.clientX, y: event.clientY }
currentPos.current = { x: event.clientX, y: event.clientY }
setIsHovering(true)
}, [])

Expand All @@ -209,16 +220,14 @@ export default function Collaboration() {

return (
<section
ref={sectionRef}
id='collaboration'
aria-labelledby='collaboration-heading'
className='bg-[#1C1C1C]'
style={{ cursor: isHovering ? 'none' : 'auto' }}
className='bg-[#1C1C1C] hover:cursor-none'
onMouseMove={handleMouseMove}
onMouseEnter={handleMouseEnter}
onMouseLeave={handleMouseLeave}
>
<YouCursor x={cursorPos.x} y={cursorPos.y} visible={isHovering} />
<YouCursor cursorRef={cursorRef} visible={isHovering} />
<style dangerouslySetInnerHTML={{ __html: CURSOR_KEYFRAMES }} />

<DotGrid
Expand Down