Add memory_profiler with File.read than simple string

Author: Benoit Tigeot

1.txt

@@ -0,0 +1,72 @@
+require 'memory_profiler'
+
+report_1 = MemoryProfiler.report do
+  def get_me_directly
+    File.read('1.txt')
+  end
+  100.times { get_me_directly }
+end
+
+report_2 = MemoryProfiler.report do
+  ST = File.read('2.txt')
+  def get_me_with_constant
+    ST
+  end
+  100.times { get_me_with_constant }
+end
+
+report_3 = MemoryProfiler.report do
+  ST_FREEZE = File.read('3.txt').freeze
+  def get_me_with_constant_freeze
+    ST_FREEZE
+  end
+  100.times { get_me_with_constant_freeze }
+end
+
+puts ' With get_me_directly '.center(50, '✨')
+report_1.pretty_print
+# Allocated String Report
+# -----------------------------------
+#        200  "1.txt"
+#        200  memory_freeze_benchmark.rb:5
+#
+#        100  ""
+#        100  memory_freeze_benchmark.rb:5
+#
+#
+# Retained String Report
+# -----------------------------------
+
+puts "\n"
+puts ' With get_me_with_constant '.center(50, '✨')
+report_2.pretty_print
+# Allocated String Report
+# -----------------------------------
+#          2  "2.txt"
+#          2  memory_freeze_benchmark.rb:11
+#
+#          1  ""
+#          1  memory_freeze_benchmark.rb:11
+#
+#
+# Retained String Report
+# -----------------------------------
+#          1  ""
+#          1  memory_freeze_benchmark.rb:11
+
+puts "\n"
+puts ' With get_me_with_constant_freeze '.center(50, '✨')
+report_3.pretty_print
+# Allocated String Report
+# -----------------------------------
+#          2  "3.txt"
+#          2  memory_freeze_benchmark.rb:19
+#
+#          1  ""
+#          1  memory_freeze_benchmark.rb:19
+#
+#
+# Retained String Report
+# -----------------------------------
+#          1  ""
+#          1  memory_freeze_benchmark.rb:19