merge revision(s) 44772: [Backport #9430]

	benchmark/driver: avoid large alloc in driver process

	* benchmark/driver: avoid large alloc in driver process
  [ruby-core:59869] [Bug #9430]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@45121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/benchmark/driver.rb b/benchmark/driver.rb
index 695dc41aff..cbc72cf604 100644
--- a/benchmark/driver.rb
+++ b/benchmark/driver.rb
@@ -242,7 +242,7 @@ class BenchmarkDriver
     cmd = "#{executable} #{@ruby_arg} #{file}"
 
     m = Benchmark.measure{
-      `#{cmd}`
+      system(cmd, out: File::NULL)
     }
 
     if $? != 0