From 249bd1ed2a00c9c3defdd09224b22a6691f73789 Mon Sep 17 00:00:00 2001
From: normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 24 Aug 2014 02:03:06 +0000
Subject: lib/benchmark.rb: speedup by reducing allocations

* lib/benchmark.rb (module Benchmark): define BENCHMARK_CLOCK
  (realtime): use Process.clock_gettime(BENCHMARK_CLOCK)
  [Feature #10165]

* test/benchmark/test_benchmark.rb (test_realtime_output): new test

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47260 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/benchmark.rb | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'lib')

diff --git a/lib/benchmark.rb b/lib/benchmark.rb
index bd3b07284f..eff6cb12ef 100644
--- a/lib/benchmark.rb
+++ b/lib/benchmark.rb
@@ -286,13 +286,21 @@ module Benchmark
                        label)
   end
 
+  # :stopdoc:
+  if defined?(Process::CLOCK_MONOTONIC)
+    BENCHMARK_CLOCK = Process::CLOCK_MONOTONIC
+  else
+    BENCHMARK_CLOCK = Process::CLOCK_REALTIME
+  end
+  # :startdoc:
+
   #
   # Returns the elapsed real time used to execute the given block.
   #
   def realtime # :yield:
-    r0 = Time.now
+    r0 = Process.clock_gettime(BENCHMARK_CLOCK)
     yield
-    Time.now - r0
+    Process.clock_gettime(BENCHMARK_CLOCK) - r0
   end
 
   module_function :benchmark, :measure, :realtime, :bm, :bmbm
-- 
cgit v1.2.3