Memory leak

[amat27]

Description

more than 30Gig memory used after coding for about a morning. windows 11. using copilot provider

Plugins

none

OpenCode version

1.1.21

Steps to reproduce

coding work for half a day

Screenshot and/or share link

Operating System

windows 11

Terminal

windows terminal

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• memory leak #7046: memory leak
• Too high memory usage #5700: Too high memory usage
• opencode eating 70gb of memory? #5363: opencode eating 70gb of memory?

Feel free to ignore if none of these address your specific case.

[LIHUA919]

Based on my analysis of the recent memory leak fixes, here are the root causes:

Root Causes

1. TUI Footer Timeout Leak (#8255)

The footer component creates recursive timeouts but only cleans up the last one:

// Before (leak):
let timeout = setTimeout(() => tick(), 10000)
onCleanup(() => clearTimeout(timeout))  // Only clears last timeout

// After (fixed):
const timeouts = []
timeouts.push(setTimeout(() => tick(), 10000))
onCleanup(() => timeouts.forEach(clearTimeout))  // Clears all

Hundreds of uncleaned timers accumulate over time.

2. MCP Client Not Closed (#8253)

When reinitializing MCP clients, the old one was overwritten without closing:

// Before (leak):
s.clients[name] = result.mcpClient  // Old client still active!

// After (fixed):
await existingClient?.close()
s.clients[name] = result.mcpClient

This is especially critical for Copilot users since it uses the MCP protocol.

3. State Instance Not Removed from Map (#8252)

// Before (leak):
entries.clear()  // But recordsByKey still holds reference

// After (fixed):
entries.clear()
recordsByKey.delete(key)  // Actually remove the reference

Common Pattern

All three issues stem from the same problem: creating new resources without properly tracking/cleaning up old ones.

Recommendation

1. Update to the latest version - These fixes are very recent (merged Jan 13-14)
2. If the issue persists, please export your session to help identify remaining leaks:

   opencode export > session.json

3. The MCP client leak (fix(mcp): close existing client before reassignment to prevent leaks #8253) is particularly relevant for Copilot users - make sure you have this fix

Related Fixes

• fix(tui): track all timeouts in Footer to prevent memory leak #8255: TUI timeout leak
• fix(mcp): close existing client before reassignment to prevent leaks #8253: MCP client leak
• fix(state): delete key from recordsByKey on instance disposal #8252: State disposal leak
• Fix: High CPU / memory leak when filtering model list window to empty results #6435: Model list filter leak
• fix(plugin): prevent duplicate plugin function initialization #6787: Plugin duplicate initialization