API Response Optimization Reduce payload sizes, implement caching, and enable compression for faster APIs. Sparse Fieldsets HTTP Caching Headers Response Compression Performance Targets | Metric | Target | |--------|--------| | Response time | <100ms (from 500ms) | | Payload size | <50KB (from 500KB) | | Server CPU | <30% (from 80%) | Optimization Checklist - [ ] Remove sensitive/unnecessary fields from responses - [ ] Implement sparse fieldsets - [ ] Add ETag/Last-Modified headers - [ ] Enable gzip/brotli compression - [ ] Use pagination for collections - [ ] Eager load to prevent N+1 querie…