diff --git a/code/general/raise-vs-e2mmap.rb b/code/general/raise-vs-e2mmap.rb
deleted file mode 100644
index 2d8ee4e..0000000
--- a/code/general/raise-vs-e2mmap.rb
+++ /dev/null
@@ -1,73 +0,0 @@
-require 'benchmark/ips'
-require 'e2mmap'
-
-class WithE2MM
-  extend Exception2MessageMapper
-
-  def_e2message TypeError, 'argument must be a %s'
-  def_exception :FooError, 'foo: %s'
-
-  def self.raise_ruby_defined
-    Raise TypeError, 'Hash'
-  end
-
-  def self.raise_user_defined
-    Raise FooError, 'bar!'
-  end
-end
-
-class WithoutE2MM
-  FooError = Class.new(StandardError)
-
-  def self.raise_ruby_defined
-    raise TypeError, 'argument must be a Hash'
-  end
-
-  def self.raise_user_defined
-    raise FooError, 'foo: bar!'
-  end
-end
-
-def slow_ruby_defined
-  begin
-    WithE2MM.raise_ruby_defined
-  rescue
-    'fast ruby'
-  end
-end
-
-def fast_ruby_defined
-  begin
-    WithoutE2MM.raise_ruby_defined
-  rescue
-    'fast ruby'
-  end
-end
-
-def slow_user_defined
-  begin
-    WithE2MM.raise_user_defined
-  rescue
-    'fast ruby'
-  end
-end
-
-def fast_user_defined
-  begin
-    WithoutE2MM.raise_user_defined
-  rescue
-    'fast ruby'
-  end
-end
-
-Benchmark.ips do |x|
-  x.report('Ruby exception: E2MM#Raise')   { slow_ruby_defined }
-  x.report('Ruby exception: Kernel#raise') { fast_ruby_defined }
-  x.compare!
-end
-
-Benchmark.ips do |x|
-  x.report('Custom exception: E2MM#Raise')   { slow_user_defined }
-  x.report('Custom exception: Kernel#raise') { fast_user_defined }
-  x.compare!
-end