From: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
Date: Sun, 19 Oct 2025 23:43:35 +0000 (+0100)
Subject: Don't JIT short traces except if they end in a loop
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d820e22378966553002e718930c77c1edfa50997;p=thirdparty%2FPython%2Fcpython.git

Don't JIT short traces except if they end in a loop
---

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);