Back to feed
Dev.to
Dev.to
7/11/2026
The user wants me to rewrite a headline for a mobile feed based on the original title and summary.

The user wants me to rewrite a headline for a mobile feed based on the original title and summary.

Original: How I Kept a Live Chat Feed Smooth at 3,700+ Messages

Short summary

A frontend developer built LiveShop, a live-shopping stream UI, to test chat feed performance under message spikes. A naive .map() render dropped FPS to 25 at 3,700 messages due to 3,300+ mounted DOM nodes. Virtualizing the list with react-window held 60fps with only 14 DOM nodes regardless of message count. Additional optimizations included capping concurrent reaction animations and limiting client-side chat history to 5,000 messages.

  • •Naive chat rendering mounts one DOM node per message, causing FPS drops at scale
  • •react-window virtualization keeps DOM footprint constant at ~14 visible rows, maintaining 60fps
  • •Reaction animations capped at 8 concurrent; chat history capped at 5,000 messages to bound memory

Generated with AI, which can make mistakes.

#ai-tools
Read full article at Dev.to

Is this a good recommendation for you?

Comments

Failed to load comments. Please try again.

Explore more

I built a 20 kB React hook that doesn't care which AI you use — here's how streaming actually works
Dev.to
60 FPS with 600 Snakes: How I Got the Browser Client to Survive a Room Full of Snakes
Dev.to
My React Search Box Froze on Every Keystroke. I Fixed It by Stealing Python's #1 Scope Rule.
Dev.to
The Mall of React, Part 2: Performance, Concurrency & Testing
Dev.to