From 856ae52021e2e75934f22158ff78a1adbd86ce22 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sun, 5 Dec 2021 08:12:24 +0900
Subject: bm_ao_rendar.rb: use instance variables instead of class variables.

Class variables are slower than instance variables of classes.
---
 benchmark/bm_ao_render.rb | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/benchmark/bm_ao_render.rb b/benchmark/bm_ao_render.rb
index e55c34e09..77620cf07 100644
--- a/benchmark/bm_ao_render.rb
+++ b/benchmark/bm_ao_render.rb
@@ -12,18 +12,18 @@ NAO_SAMPLES = 8
 
 module Rand
   # Use xorshift
-  @@x = 123456789
-  @@y = 362436069
-  @@z = 521288629
-  @@w = 88675123
+  @x = 123456789
+  @y = 362436069
+  @z = 521288629
+  @w = 88675123
   BNUM = 1 << 29
   BNUMF = BNUM.to_f
   def self.rand
-    x = @@x
+    x = @x
     t = x ^ ((x & 0xfffff) << 11)
-    w = @@w
-    @@x, @@y, @@z = @@y, @@z, w
-    w = @@w = (w ^ (w >> 19) ^ (t ^ (t >> 8)))
+    w = @w
+    @x, @y, @z = @y, @z, w
+    w = @w = (w ^ (w >> 19) ^ (t ^ (t >> 8)))
     (w % BNUM) / BNUMF
   end
 end
-- 
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