From 7f66e50ba2f71514da711a7927554956faea2f29 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Wed, 2 Sep 2020 08:41:55 +0900
Subject: Explain `MRB_USE_MALLOC_TRIM`; ref #5069

---
 doc/mruby3.md | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'doc')

diff --git a/doc/mruby3.md b/doc/mruby3.md
index c8ec76937..ae6e674e5 100644
--- a/doc/mruby3.md
+++ b/doc/mruby3.md
@@ -96,6 +96,11 @@ does not fit in `Fixnum` integers.
 Pack `mrb_value` in a floating pointer number. Nothing
 changed from previous versions.
 
+== `MRB_USE_MALLOC_TRIM`
+
+Call `malloc_trim(0)` from mrb_full_gc() if this macro is defined.
+If you are using glibc malloc, this macro could reduce memory consumption.
+
 = Internal Changes
 
 == `Random` now use `xoshiro128++`.
-- 
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