Use benchmark-ips for benchs

Gemfile

@@ -4,6 +4,7 @@ group :development do
   gem 'rdoc'
 end
 group :test do
-  gem 'rspec'
+  gem 'benchmark-ips'
   gem 'rake'
+  gem 'rspec'
 end

spec/bench.rb

@@ -1,21 +1,8 @@
+require 'benchmark/ips'
+
 $:.unshift File.expand_path('../../lib', __FILE__)
 require 'lines'
 
-module Kernel
-  def bm(name = nil, &what)
-    start = Time.now.to_f
-    count = 0
-    max = 0.5
-    name ||= what.source_location.join(':')
-    $stdout.write "#{name} : "
-    while Time.now.to_f - start < max
-      yield
-      count += 1
-    end
-    $stdout.puts "%0.3f fps" % (count / max)
-  end
-end
-
 class FakeIO
   def write(*a)
   end
@@ -30,29 +17,30 @@ def write(*a)
 
 EX = (raise "FOO" rescue $!)
 
-Lines.use(FakeIO.new, globals)
-bm "FakeIO write" do
-  Lines.log EX
-end
+Benchmark.ips do |x|
+  x.report "FakeIO write" do |n|
+    Lines.use(FakeIO.new, globals)
+    n.times{ Lines.log EX }
+  end
 
-dev_null = File.open('/dev/null', 'w')
-Lines.use(dev_null, globals)
-bm "/dev/null write" do
-  Lines.log EX
-end
+  x.report "/dev/null write" do |n|
+    dev_null = File.open('/dev/null', 'w')
+    Lines.use(dev_null, globals)
+    n.times{ Lines.log EX }
+  end
 
-Lines.use(Syslog, globals)
-bm "syslog write" do
-  Lines.log EX
-end
+  x.report "syslog write" do |n|
+    Lines.use(Syslog, globals)
+    n.times{ Lines.log EX }
+  end
 
-real_file = File.open('real_file.log', 'w')
-Lines.use(real_file, globals)
-bm "real file" do
-  Lines.log EX
-end
+  x.report "real file" do |n|
+    real_file = File.open('real_file.log', 'w')
+    Lines.use(real_file, globals)
+    n.times{ Lines.log EX }
+  end
 
-bm "real file logger" do
-  Lines.logger.info "Ahoi this is a really cool option"
+  x.report "real file logger" do |n|
+    n.times{ Lines.logger.info "Ahoi this is a really cool option" }
+  end
 end
-