[BUG] Instant compaction is not instant

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

"Instant Compaction" is far from instant. In fact I think it's slower than before.

What Should Happen?

Instant compaction should be... I don't know... instant?

Error Messages/Logs

Steps to Reproduce

1. Use Claude Code
2. Instant compaction is not instant.

Claude Model

None

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.0.74

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_