elixir-performance-review
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ChineseElixir Performance Review
Elixir性能审查
Quick Reference
快速参考
| Issue Type | Reference |
|---|---|
| Mailbox overflow, blocking calls | references/genserver-bottlenecks.md |
| When to use ETS, read/write concurrency | references/ets-patterns.md |
| Binary handling, large messages | references/memory.md |
| Task patterns, flow control | references/concurrency.md |
| 问题类型 | 参考链接 |
|---|---|
| 邮箱溢出、阻塞调用 | references/genserver-bottlenecks.md |
| ETS的使用场景、读写并发 | references/ets-patterns.md |
| 二进制数据处理、大型消息 | references/memory.md |
| Task模式、流控制 | references/concurrency.md |
Review Checklist
审查清单
GenServer
GenServer
- Not a single-process bottleneck for all requests
- No blocking operations in handle_call/cast
- Proper timeout configuration
- Consider ETS for read-heavy state
- 并非所有请求都依赖单进程（无单进程瓶颈）
- handle_call/cast中无阻塞操作
- 正确配置超时时间
- 针对读密集型状态考虑使用ETS
Memory
内存
- Large binaries not copied between processes
- Streams used for large data transformations
- No unbounded data accumulation
- 进程间不复制大型二进制数据
- 使用Streams处理大型数据转换
- 无无限制的数据累积
Concurrency
并发
- Task.Supervisor for dynamic tasks (not raw Task.async)
- No unbounded process spawning
- Proper backpressure for message producers
- 使用Task.Supervisor管理动态任务（而非直接使用Task.async）
- 无无限制的进程生成
- 为消息生产者设置适当的背压
Database
数据库
- Preloading to avoid N+1 queries
- Pagination for large result sets
- Indexes for frequent queries
- 使用预加载避免N+1查询
- 对大型结果集使用分页
- 为频繁查询创建索引
Valid Patterns (Do NOT Flag)
有效模式（无需标记）
- Single GenServer for low-throughput - Not all state needs horizontal scaling
- Synchronous calls for critical paths - Consistency may require it
- In-memory state without ETS - ETS has overhead for small state
- Enum over Stream for small collections - Stream overhead not worth it
- 低吞吐量场景下使用单GenServer - 并非所有状态都需要水平扩展
- 关键路径使用同步调用 - 一致性需求可能需要这么做
- 不使用ETS的内存状态 - 小型状态使用ETS会有额外开销
- 小型集合使用Enum而非Stream - Stream的额外开销得不偿失
Context-Sensitive Rules
上下文敏感规则
| Issue | Flag ONLY IF |
|---|---|
| GenServer bottleneck | Handles > 1000 req/sec OR blocking I/O in callbacks |
| Use streams | Processing > 10k items OR reading large files |
| Use ETS | Read:write ratio > 10:1 AND concurrent access |
| 问题 | 仅在以下情况标记 |
|---|---|
| GenServer瓶颈 | 处理请求>1000次/秒 或 回调中存在阻塞I/O |
| 使用Streams | 处理>10000条数据 或 读取大文件 |
| 使用ETS | 读/写比>10:1 且 存在并发访问 |
Before Submitting Findings
提交检查结果前
Load and follow review-verification-protocol before reporting any issue.
在报告任何问题前，请加载并遵循审查验证协议。