Better GC stats

test/gc_benchmark.rb

@@ -6,13 +6,36 @@ with_gc = Mysql.real_connect('localhost','root','','mysql')
 without_gc = Mysql.real_connect('localhost','root','','mysql')
 without_gc.disable_gc = true
 
+$gc_stats = []
+
+def countable_gc?
+  GC.respond_to? :count
+end
+
+def gc_counts( label, scope )
+  $gc_stats << "GC #{scope} ( #{label} ) #{GC.count}"
+end
+
+def with_gc_counts( label )
+  gc_counts( label, 'before' ) if countable_gc?
+  yield
+  gc_counts( label, 'after' ) if countable_gc?
+end
+
 n = 1000
+
 Benchmark.bm do |x|
   x.report( 'With GC' ) do
-    n.times{ with_gc.c_async_query( 'SELECT * FROM user' ) }
+    with_gc_counts( 'With GC' ) do
+      n.times{ with_gc.c_async_query( 'SELECT * FROM user' ) }
+    end
   end  
   GC.start  
   x.report( 'Without GC' ) do
-    n.times{ without_gc.c_async_query( 'SELECT * FROM user' ) }
+    with_gc_counts( 'Without GC' ) do
+      n.times{ without_gc.c_async_query( 'SELECT * FROM user' ) }
+    end
   end
-end
+end
+
+puts $gc_stats.join( ' | ' )