From 1e87bf6d2f5a03413ef0c9322e6a7f42d89c443f Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Thu, 8 Aug 2013 21:42:20 +0900
Subject: allow turning off GC generational mode by default by
 MRB_GC_TURN_OFF_GENERATIONAL; #1447

---
 include/mrbconf.h | 3 +++
 src/gc.c          | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/include/mrbconf.h b/include/mrbconf.h
index 57148d428..a10a1d04e 100644
--- a/include/mrbconf.h
+++ b/include/mrbconf.h
@@ -41,6 +41,9 @@
 /* initial size for IREP array */
 //#define MRB_IREP_ARRAY_INIT_SIZE (256u)
 
+/* turn off generational GC by default */
+//#define MRB_GC_TURN_OFF_GENERATIONAL
+
 /* default size of khash table bucket */
 //#define KHASH_DEFAULT_SIZE 32
 
diff --git a/src/gc.c b/src/gc.c
index 105713a3d..9ecb0615d 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -334,8 +334,10 @@ mrb_init_heap(mrb_state *mrb)
   add_heap(mrb);
   mrb->gc_interval_ratio = DEFAULT_GC_INTERVAL_RATIO;
   mrb->gc_step_ratio = DEFAULT_GC_STEP_RATIO;
+#ifndef MRB_GC_TURN_OFF_GENERATIONAL
   mrb->is_generational_gc_mode = TRUE;
   mrb->gc_full = TRUE;
+#endif
 
 #ifdef GC_PROFILE
   program_invoke_time = gettimeofday_time();
-- 
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