1 files changed, 26 insertions, 7 deletions
diff --git a/bench/bench_struct_field.rb b/bench/bench_struct_field.rb
index b74a1bb..0e6faf4 100644
--- a/bench/bench_struct_field.rb
+++ b/bench/bench_struct_field.rb
@@ -2,7 +2,7 @@ require File.expand_path(File.join(File.dirname(__FILE__), "bench_helper"))
 
 require 'benchmark'
 require 'ffi'
-iter = 1000_000
+iter = ITER
 
 class TestStruct < FFI::Struct
   layout :i, :int, :p, :pointer
@@ -12,33 +12,49 @@ s = TestStruct.new(FFI::MemoryPointer.new(TestStruct))
 puts "Benchmark FFI Struct.get(:int) performance, #{iter}x"
 10.times {
   puts Benchmark.measure {
-    iter.times { s[:i] }
+    i = 0; while i < iter
+      s[:i]
+      i += 1
+    end
   }
 }
 
 puts "Benchmark FFI Struct.get(:int) using string name performance, #{iter}x"
 10.times {
   puts Benchmark.measure {
-    iter.times { s[:i] }
+    i = 0; while i < iter
+      s['i']
+      i += 1
+    end
   }
 }
+
 puts "Benchmark FFI Struct.put(:int) performance, #{iter}x"
 10.times {
   puts Benchmark.measure {
-    iter.times { s[:i] = 0x12345678 }
+    i = 0; while i < iter
+      s[:i] = 0x12345678
+      i += 1
+    end
   }
 }
 puts "Benchmark FFI Struct.get(:pointer) performance, #{iter}x"
 10.times {
   puts Benchmark.measure {
-    iter.times { s[:p] }
+    i = 0; while i < iter
+      s[:p]
+      i += 1
+    end
   }
 }
 puts "Benchmark FFI Struct.put(:pointer) performance, #{iter}x"
 10.times {
   p = FFI::MemoryPointer.new :int
   puts Benchmark.measure {
-    iter.times { s[:p] = p }
+    i = 0; while i < iter
+      s[:p] = p
+      i += 1
+    end
   }
 }
 puts "Benchmark FFI Struct.get(:string) performance, #{iter}x"
@@ -51,6 +67,9 @@ end
   s = StringStruct.new
   s.pointer.put_pointer(0, mp)
   puts Benchmark.measure {
-    iter.times { s[:s] }
+    i = 0; while i < iter
+      s[:s]
+      i += 1
+    end
   }
 }