Windows: opencode temp directory accumulated 150k+ files and caused 30s ProfSvc logon delay #27005

Summary

On Windows, opencode/OpenCode created or left a very large number of files under %LOCALAPPDATA%\Temp\opencode. This caused Windows User Profile Service (ProfSvc) to spend ~30 seconds during post-PIN logon scanning the user temp tree before the desktop appeared.

After cleaning %LOCALAPPDATA%\Temp\opencode, the same logon phase dropped from ~30 seconds to ~5 seconds.

Impact

This is not just disk usage. On Windows, a large temp tree can directly affect interactive logon time because ProfSvc scans the user temp directory during profile load.

Observed before cleanup:

%LOCALAPPDATA%\Temp
Items=156,045
Dirs=11,058
Files=144,987
Size=2.87 GB

%LOCALAPPDATA%\Temp\opencode
Items=152,744
Files=142,179
Size=2.56 GB

Observed after cleanup:

%LOCALAPPDATA%\Temp
Items≈17,980
Files≈15,914
Size≈0.64 GB

ProfSvc logon phase: ~5 seconds instead of ~30 seconds

Evidence

Windows Event Log showed the delay in the Microsoft-Windows-User Profile Service/Operational log for the affected user profile. A separate clean test profile logged in immediately.

A dump of the ProfSvc svchost process during the delay showed it inside the temp-tree scan path:

ProfSvc
CUserProfile::Load
CreateTempDirectoryForUser
StorageReserveHelper::SetReserveAreaOnFileTree
StorageReserveHelper::RecursiveScanDirectory

This matches the observed behavior: once the temp tree was cleaned, the delay disappeared.

Environment

OS: Windows
OpenCode desktop: 1.14.40
Older OpenCode install metadata also present: 1.14.33
Temp path: %LOCALAPPDATA%\Temp\opencode

Expected Behavior

opencode should not leave unbounded temporary artifacts under %LOCALAPPDATA%\Temp\opencode.

Possible mitigations:

• Clean old temp/session artifacts on startup or shutdown.
• Use bounded cache retention by age and/or size.
• Store durable cache under %LOCALAPPDATA%\OpenCode instead of %TEMP%.
• Avoid creating very high file counts in Windows temp directories.
• Provide a documented cleanup command.

Actual Behavior

The temp directory grew to 150k+ items within a relatively short install window and caused a reproducible Windows post-PIN logon delay.

Request

Please add automatic cleanup/retention for %LOCALAPPDATA%\Temp\opencode on Windows, or move non-temporary cache artifacts to a bounded cache directory.