ECO-CMP-JS-005 — Blocking crypto in event loop¶

Category: Computation (CMP)
Family: JavaScript (JS)
Layer: Code
Tier: 2
Severity: warning
Tags: javascript, crypto, latency
Legacy ID: ECO-JS-005

Summary¶

CPU-heavy crypto blocks the event loop and inflates latency.

Event loop stalls propagate to all concurrent requests.

{
  "confidence": 0.75,
  "notes": "Use workers for heavy CPU work.",
  "type": "latency"
}

{
  "languages": [
    "javascript"
  ],
  "method": "hybrid"
}

{
  "guidance": "Move CPU-heavy crypto to worker threads or native async APIs.",
  "tradeoffs": "Complexity increase."
}

{
  "system_layers": [
    "code"
  ]
}