.

Makefile

@@ -10,8 +10,8 @@ $(XDAT)	:
 bench	: bench_c bench_go
 
 bench_copy: t_copy_c t_copy_go
-	./t_copy_c >t_copy_c.csv
 	./t_copy_go >t_copy_go.csv
+	./t_copy_c >t_copy_c.csv
 
 bench_c	: t_syspread_c $(XDAT) t_copy_c
 	./t_syspread_c $(XDAT) >t_syspread_c.csv

t_copy_c.c

@@ -22,9 +22,9 @@ double microtime() {
 }
 
 //		 12345678
-#define	NITER	1000000
+#define	NITER	10000000
 
-#define	BUFSIZE	1024*1024
+#define	BUFSIZE	4*1024*1024
 static char buf[BUFSIZE];
 static char buf2[BUFSIZE];
 
@@ -53,14 +53,14 @@ int main() {
 		printf("%ld\t%.1f\n", size, (Tend - Tstart) / niter / 1E-9);
 
 
-		size += 128;
-
-		//if (size < 4*1024) {
-		//	size += 128;	// detailed start
-		//} else if  (size < 32*1024) {
-		//	size += 256;
-		//} else {
-		//	size += 512;
-		//}
+		if (size < 256) {
+			size += 1;	// detailed start
+		} else if (size < 32*1024) {
+			size += 128;
+		} else if (size < 1024*1024) {
+			size += 512;
+		} else {
+			size += 1024;
+		}
 	}
 }

t_copy_go.go

@@ -6,9 +6,9 @@ import (
 )
 
 //             12345678
-const Niter = 1000000
+const Niter = 10000000
 
-const BufSize = 1024*1024
+const BufSize = 4*1024*1024
 var buf  [BufSize]byte
 var buf2 [BufSize]byte
 
@@ -36,15 +36,15 @@ func main() {
 
 		fmt.Printf("%v\t%.1f\n", size, float64(Tend.Sub(Tstart).Nanoseconds()) / float64(niter))
 
-		size += 128
-
-		//switch {
-		//case size < 4*1024:
-		//	size += 128	// detailed start
-		//case size < 32*1024:
-		//	size += 256
-		//default:
-		//	size += 512
-		//}
+		switch {
+		case size < 256:
+			size += 1	// detailed start
+		case size < 32*1024:
+			size += 128
+		case size < 1024*1024:
+			size += 512
+		default:
+			size += 1024
+		}
 	}
 }