From c3eac4fe5cd623a8d19da5149cd07f04d31d038e Mon Sep 17 00:00:00 2001
From: dearblue <dearblue@users.osdn.me>
Date: Sun, 13 Mar 2022 16:28:43 +0900
Subject: [PATCH] No need to protect red objects

The object in `GC_RED` does not need to be marked, and the objects connected to this object should also not need to be marked.
---
 src/gc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gc.c b/src/gc.c
index a6ff0c588..b0885a307 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -448,6 +448,7 @@ mrb_gc_destroy(mrb_state *mrb, mrb_gc *gc)
 static void
 gc_protect(mrb_state *mrb, mrb_gc *gc, struct RBasic *p)
 {
+  if (is_red(p)) return;
 #ifdef MRB_GC_FIXED_ARENA
   if (gc->arena_idx >= MRB_GC_ARENA_SIZE) {
     /* arena overflow error */