performance-optimization

基于测量与剖析定位瓶颈并有针对性地优化应用性能。

先测量再优化：通过 profiling 找到前端、后端或数据库的真实瓶颈，针对性修复后再复测，避免盲目优化。在需要达成性能指标、怀疑回归或要改善 Core Web Vitals、加载时间和 N+1 问题时使用。强调以数据为驱动，只优化对用户体验有实际影响的瓶颈。

# Performance Optimization

## Overview

Measure before optimizing. Performance work without measurement is guessing — and guessing leads to premature optimization that adds complexity without improving what matters. Profile first, identify the actual bottleneck, fix it, measure again. Optimize only what measurements prove matters.

## When to Use

- Performance requirements exist in the spec (load time budgets, response time SLAs)
- Users or monitoring report slow behavior
- Core Web Vitals scores are below thresholds
- You suspect a change introduced a regression
- Building features that handle large datasets or high traffic

**When NOT to use:** Don't optimize before you have evidence of