Memory leak: 4.6GB arrayBuffers after 62 seconds

Description

Claude Code accumulated ~4.6 GB in arrayBuffers (5 GB external memory) within 62 seconds of startup, with a growth rate of ~32,860 MB/hour.

Diagnostics

• Claude Code version: 2.1.72
• Node: v24.3.0
• Platform: linux
• Uptime at dump: 62 seconds
• Trigger: manual

Memory snapshot

| Metric | Value |
|--------|-------|
| heapUsed | 5,033 MB |
| heapTotal | 45 MB |
| external | 4,995 MB |
| arrayBuffers | 4,591 MB |
| RSS | 585 MB |
| Growth rate | 32,860 MB/hour |

Potential causes

• MCP servers (Playwright, Pencil) sending large responses
• Large file reads or API responses accumulating in buffers
• Internal buffer retention issue

Full diagnostics JSON

{
  "timestamp": "2026-03-12T00:59:55.995Z",
  "sessionId": "f2c19fa5-8107-4320-84b1-f6390681b329",
  "trigger": "manual",
  "dumpNumber": 0,
  "uptimeSeconds": 62.441979635,
  "memoryUsage": {
    "heapUsed": 5033259963,
    "heapTotal": 45336576,
    "external": 4995425723,
    "arrayBuffers": 4591934287,
    "rss": 597639168
  },
  "memoryGrowthRate": {
    "bytesPerSecond": 9571111.798399983,
    "mbPerHour": 32859.80460571283
  },
  "v8HeapStats": {
    "heapSizeLimit": 5976391680,
    "mallocedMemory": 5033522363,
    "peakMallocedMemory": 597639168,
    "detachedContexts": 0,
    "nativeContexts": 1
  },
  "resourceUsage": {
    "maxRSS": 597639168,
    "userCPUTime": 26885546,
    "systemCPUTime": 12261944
  },
  "activeHandles": 0,
  "activeRequests": 0,
  "openFileDescriptors": 86,
  "analysis": {
    "potentialLeaks": ["High memory growth rate: 32859.8 MB/hour"],
    "recommendation": "WARNING: 1 potential leak indicator(s) found."
  },
  "platform": "linux",
  "nodeVersion": "v24.3.0",
  "ccVersion": "2.1.72"
}