ECO-CMP-JS-014 — Client-side heavy computation without workers¶

Category: Computation (CMP)
Family: JavaScript (JS)
Layer: Code
Tier: 1
Severity: warning
Tags: javascript, web-workers
Legacy ID: ECO-JS-014

Summary¶

Heavy CPU work on main thread harms responsiveness and drains battery.

Main-thread CPU work directly impacts user experience and power use.

{
  "confidence": 0.7,
  "notes": "Visible as long tasks.",
  "type": "cpu"
}

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

{
  "guidance": "Move heavy compute to web workers; optimize algorithms.",
  "tradeoffs": "More complexity."
}

{
  "system_layers": [
    "code"
  ]
}