My Jetpack Compose List Was Dropping Frames on ₹ Signs — Here's the Fix
Jetpack Compose has transformed Android UI development. Its declarative programming model, concise syntax, and reactive state integration make building modern interfaces a joy. Until you load a few hundred date-grouped financial transactions into a LazyColumn , swipe down rapidly, and watch your silky-smooth 120Hz display stutter. In personal finance apps, transaction feeds are dynamic,…
FinLedger, a personal finance app, experienced UI frame drops when rendering large lists of transaction data. The root causes were heavy list transformations on the main thread, multiple database queries firing simultaneously, and unstable model classes causing unnecessary recompositions. To fix these issues, the team refactored the reactive data pipeline to offload computations to background threads (Dispatchers.Default), consolidated multiple database queries into three shared hot streams, and replaced standard collectAsState with collectAsStateWithLifecycle to prevent background flow collection.
These optimizations resulted in an average frame render time of 3.1ms, achieving consistent 60/120fps scrolling and improving app startup time by over 35%.
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