Add Marshal.dump bench for common objects

bench/bench_marshal_dump.rb

@@ -0,0 +1,61 @@
+require 'benchmark/ips'
+
+ARRAY_OF_FIXNUMS = [1,2,3,4,5,6,7,8,9,10]
+ARRAY_OF_FLOATS = [1.1111111111,2.2222222222,3.3333333333,4.4444444444,5.5555555555,6.6666666666,7.7777777777,8.8888888888,9.9999999999,10.111111111]
+ARRAY_OF_STRINGS = ARRAY_OF_FLOATS.map(&:to_s)
+ARRAY_OF_ARRAYS = ARRAY_OF_FIXNUMS.map {[it]}
+ARRAY_OF_HASHES = ARRAY_OF_FIXNUMS.map {{it => it}}
+
+class Foo
+  def initialize(val)
+    @val = val
+  end
+end
+
+ARRAY_OF_OBJECTS = ARRAY_OF_FIXNUMS.map {Foo.new(it)}
+ARRAY_OF_TIMES = 10.times.map {Time.now}
+
+Benchmark.ips do |bm|
+  bm.report("array of fixnums") do |i|
+    while i > 0
+      i-=1
+      Marshal.dump(ARRAY_OF_FIXNUMS)
+    end
+  end
+  bm.report("array of floats") do |i|
+    while i > 0
+      i-=1
+      Marshal.dump(ARRAY_OF_FLOATS)
+    end
+  end
+  bm.report("array of strings") do |i|
+    while i > 0
+      i-=1
+      Marshal.dump(ARRAY_OF_STRINGS)
+    end
+  end
+  bm.report("array of arrays") do |i|
+    while i > 0
+      i-=1
+      Marshal.dump(ARRAY_OF_ARRAYS)
+    end
+  end
+  bm.report("array of hashes") do |i|
+    while i > 0
+      i-=1
+      Marshal.dump(ARRAY_OF_HASHES)
+    end
+  end
+  bm.report("array of objects") do |i|
+    while i > 0
+      i-=1
+      Marshal.dump(ARRAY_OF_OBJECTS)
+    end
+  end
+  bm.report("array of times") do |i|
+    while i > 0
+      i-=1
+      Marshal.dump(ARRAY_OF_TIMES)
+    end
+  end
+end