From b587b8c7cb68f06b8463679986b1efe1bd3ac637 Mon Sep 17 00:00:00 2001
From: Blake Imsland <blake@zxcv.dev>
Date: Sun, 13 Mar 2022 23:27:46 -0700
Subject: [PATCH] Increase speed of UUID generation

---
 lib/random/formatter.rb | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/random/formatter.rb b/lib/random/formatter.rb
index 744853a..9b8b38f 100644
--- a/lib/random/formatter.rb
+++ b/lib/random/formatter.rb
@@ -142,10 +142,10 @@ def urlsafe_base64(n=nil, padding=false)
   # See RFC 4122 for details of UUID.
   #
   def uuid
-    ary = random_bytes(16).unpack("NnnnnN")
-    ary[2] = (ary[2] & 0x0fff) | 0x4000
-    ary[3] = (ary[3] & 0x3fff) | 0x8000
-    "%08x-%04x-%04x-%04x-%04x%08x" % ary
+    ary = random_bytes(16)
+    ary.setbyte(6, (ary.getbyte(6) & 0x0f) | 0x40)
+    ary.setbyte(8, (ary.getbyte(8) & 0x3f) | 0x80)
+    ary.unpack("H8H4H4H4H12").join(?-)
   end
 
   private def gen_random(n)