Unclear What effect JIT policy 1 has on performance or behavior is not stated in the evidence.
What
On most CLI startups (excluding the --preload and --bg-spare fast paths), Claude Code now starts a background timer that, 10 seconds after launch, calls Bun.unsafe.setJITPolicy?.(1).
Why
This is an internal runtime tuning change, likely adjusting how Bun's just-in-time compiler behaves once the code needed for startup has already run, though the finding does not specify the exact effect.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
What effect JIT policy 1 has on performance or behavior is not stated in the evidence.