Unroll some benchmark loops

2 files changed, 22 insertions, 7 deletions

diff --git a/bench/bench_enum.rb b/bench/bench_enum.rb
index ec28922..d4ebf56 100644
--- a/bench/bench_enum.rb
+++ b/bench/bench_enum.rb
@@ -4,8 +4,8 @@ module LibTest
   extend FFI::Library
   ffi_lib LIBTEST_PATH
   enum :foo, [ :a, :b, :c ]
-  attach_function :ffi_bench, :bench_s32_v, [ :foo ], :void, :save_errno => true
-  attach_function :ffi_bench_i, :bench_s32_v, [ :int ], :void, :save_errno => true
+  attach_function :ffi_bench, :bench_s32_v, [ :foo ], :void, :save_errno => false
+  attach_function :ffi_bench_i, :bench_s32_v, [ :int ], :void, :save_errno => false
   def self.rb_bench(i0); nil; end
 end
 
diff --git a/bench/bench_struct_field.rb b/bench/bench_struct_field.rb
index 0e6faf4..45ec7be 100644
--- a/bench/bench_struct_field.rb
+++ b/bench/bench_struct_field.rb
@@ -12,7 +12,10 @@ s = TestStruct.new(FFI::MemoryPointer.new(TestStruct))
 puts "Benchmark FFI Struct.get(:int) performance, #{iter}x"
 10.times {
   puts Benchmark.measure {
-    i = 0; while i < iter
+    i = 0; max = iter / 4; while i < max
+      s[:i]
+      s[:i]
+      s[:i]
       s[:i]
       i += 1
     end
@@ -22,7 +25,10 @@ puts "Benchmark FFI Struct.get(:int) performance, #{iter}x"
 puts "Benchmark FFI Struct.get(:int) using string name performance, #{iter}x"
 10.times {
   puts Benchmark.measure {
-    i = 0; while i < iter
+    i = 0; max = iter / 4; while i < max
+      s['i']
+      s['i']
+      s['i']
       s['i']
       i += 1
     end
@@ -32,7 +38,10 @@ puts "Benchmark FFI Struct.get(:int) using string name performance, #{iter}x"
 puts "Benchmark FFI Struct.put(:int) performance, #{iter}x"
 10.times {
   puts Benchmark.measure {
-    i = 0; while i < iter
+    i = 0; max = iter / 4; while i < max
+      s[:i] = 0x12345678
+      s[:i] = 0x12345678
+      s[:i] = 0x12345678
       s[:i] = 0x12345678
       i += 1
     end
@@ -41,7 +50,10 @@ puts "Benchmark FFI Struct.put(:int) performance, #{iter}x"
 puts "Benchmark FFI Struct.get(:pointer) performance, #{iter}x"
 10.times {
   puts Benchmark.measure {
-    i = 0; while i < iter
+    i = 0; max = iter / 4; while i < max
+      s[:p]
+      s[:p]
+      s[:p]
       s[:p]
       i += 1
     end
@@ -51,7 +63,10 @@ puts "Benchmark FFI Struct.put(:pointer) performance, #{iter}x"
 10.times {
   p = FFI::MemoryPointer.new :int
   puts Benchmark.measure {
-    i = 0; while i < iter
+    i = 0; max = iter / 4; while i < max
+      s[:p] = p
+      s[:p] = p
+      s[:p] = p
       s[:p] = p
       i += 1
     end