ECO-CMP-JS-015 — Recreating large objects per render¶

Category: Computation (CMP)
Family: JavaScript (JS)
Layer: Code
Tier: 1
Severity: note
Tags: javascript, allocations
Legacy ID: ECO-JS-015

Summary¶

Allocating large objects repeatedly increases GC churn and CPU.

Avoid unnecessary allocation churn in rendering loops.

{
  "confidence": 0.55,
  "notes": "Depends on render frequency.",
  "type": "cpu"
}

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

{
  "guidance": "Memoize stable objects; move creation outside render paths.",
  "tradeoffs": "Potential for stale data if misused."
}

{
  "system_layers": [
    "code"
  ]
}