ECO-CMP-PY-004 — Blocking I/O inside async context¶

Category: Computation (CMP)
Family: Python (PY)
Layer: Code
Tier: 2
Severity: error
Tags: python, async, latency
Legacy ID: ECO-PY-004

Summary¶

Blocking calls inside async functions reduce concurrency and inflate latency.

Blocking I/O defeats the purpose of async and can stall the entire event loop.

{
  "confidence": 0.9,
  "notes": "High propagation in async servers.",
  "type": "latency"
}

{
  "languages": [
    "python"
  ],
  "method": "ast"
}

{
  "guidance": "Use async-compatible libraries (e.g., async DB/HTTP clients).",
  "tradeoffs": "Library and code changes."
}

{
  "system_layers": [
    "code"
  ]
}