Phoenix LiveView Performance Under Real Load

Typical bottlenecks

Performance issues often come from the data layer and render churn, not LiveView itself. Repeated expensive queries, over-broad assigns, and unnecessary diff updates create most of the pain.

High-leverage fixes

• profile query frequency before touching UI code
• split large views into smaller LiveComponents with clearer state ownership
• limit assign updates to only what changed
• move expensive non-interactive work to asynchronous processes

What to measure

Track query count, render frequency, and end-to-end event latency. If these are stable, LiveView can handle substantial production traffic with excellent developer velocity.

Closing

LiveView is a strong production choice when teams treat data flow and state boundaries as first-class concerns.