From d820e22378966553002e718930c77c1edfa50997 Mon Sep 17 00:00:00 2001
From: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
Date: Mon, 20 Oct 2025 00:43:35 +0100
Subject: [PATCH] Don't JIT short traces except if they end in a loop

---
 Python/optimizer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Python/optimizer.c b/Python/optimizer.c
index c46c23aa1288..53f3c6e8bfc8 100644
--- a/Python/optimizer.c
+++ b/Python/optimizer.c
@@ -1234,7 +1234,7 @@ uop_optimize(
     int curr_stackentries = tstate->interp->jit_state.jit_tracer_initial_stack_depth;
     int length = interp->jit_state.jit_tracer_code_curr_size;
     // Trace too short, don't bother.
-    if (length <= 20) {
+    if (length <= 20 && buffer[length-1].opcode != _JUMP_TO_TOP) {
         return 0;
     }
     assert(length > 0);
-- 
2.47.3