name	Flutter Performance
description	Optimization standards for rebuilds and memory.
metadata	{"labels": ["performance"], "triggers": {"files": ["lib/presentation/**", "pubspec.yaml"], "keywords": ["const", "buildWhen", "ListView.builder", "Isolate", "RepaintBoundary"]}}

Performance

Priority: P1 (OPERATIONAL)

Performance optimization techniques for smooth 60fps Flutter applications.

Rebuilds: Use const widgets and buildWhen / select for granular updates.
Lists: Always use ListView.builder for item recycling.
Heavy Tasks: Use compute() or Isolates for parsing/logic.
Repaints: Use RepaintBoundary for complex animations. Use debugRepaintRainbowEnabled to debug.
Images: Use CachedNetworkImage + memCacheWidth. precachePicture for SVGs.

BlocBuilder<UserBloc, UserState>(
  buildWhen: (p, c) => p.id != c.id,
  builder: (context, state) => Text(state.name),
)

来源：HoangNguyen0403/agent-skills-standard · MIT 许可 · 许可原文 · MD 为来源页保存的历史版本