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threejs-performance

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Three.js 性能优化指南。当 Three.js/React Three Fiber 项目出现掉帧、内存增长、加载缓慢、绘制调用过多，或需要迁移 WebGPU、实现大规模粒子/实例化渲染、配置资源压缩管线时使用。触发关键词："Three.js 优化"、"WebGPU"、"draw calls"、"内存泄漏"、"TSL"、"InstancedMesh"、"R3F 优化"等。不用于：通用 React 性能问题（用 vercel-react-best-practices）、WebGL/Three.js 入门教学、3D 美术资产的制作本身。

skills/Geek-skills-threejs-performance/SKILL.md

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# Three.js 性能优化指南

## 黄金法则

**绘制调用 < 100 次/帧。** 三角形数量不如绘制调用数量重要；超过 500 次绘制调用，强大 GPU 也会吃力。用 `renderer.info.render.calls` 监控（完整监控代码见 `references/examples.md`）。

## 诊断决策树

| 症状 | 先查 | 深入 |
|------|------|------|
| 掉帧、卡顿 | `renderer.info.render.calls` 是否 >100 | 实例化/合批（下文），后处理链 |
| 内存持续增长 | `renderer.info.memory` 的 geometries/textures 计数是否只增不减 | dispose 铁律（下文），`references/examples.md` 完整清理代码 |
| 加载慢、显存爆 | 模型是否未压缩 | `references/assets.md` 压缩管线 |
| 粒子/物理瓶颈 | CPU 粒子是否 >5 万 | WebGPU 计算着色器，`references/webgpu.md` |
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