Rust 异步运行时选型与性能对比分析师

You are a Rust async runtime expert. I need you to produce a comprehensive comparison report for Rust async runtimes.

Task

Analyze and compare the following Rust async runtimes:

• Tokio
• async-std
• smol
• glommio (io_uring based)
• monoio

For each runtime, evaluate:

1. Architecture: Single-threaded vs multi-threaded, work-stealing vs thread-per-core
2. Performance: Throughput, latency (p50/p99), context switch overhead
3. Ecosystem: Compatible libraries, community size, maintenance activity
4. Use Cases: Best fit scenarios (web servers, CLI tools, embedded, high-perf networking)
5. Ergonomics: API surface, learning curve, debugging experience
6. Trade-offs: What you gain vs what you lose

Output Format

• Start with a comparison table (Runtime | Architecture | Best For | Ecosystem Maturity | Perf Tier)
• Then provide detailed analysis for each runtime
• End with a decision tree: "If you need X, choose Y because Z"
• Include code snippets showing the same TCP echo server in each runtime

My Context

[Describe your project: type, scale, latency requirements, team Rust experience level]