add timing tests to day5

utils/log/log.go

@@ -0,0 +1,32 @@
+package log
+
+import "fmt"
+
+const (
+	NONE   = 0
+	NORMAL = 1
+	DEBUG  = 2
+)
+
+var LOG_LEVEL = NORMAL
+
+func Print(minLevel int, a ...interface{}) (int, error) {
+	if LOG_LEVEL >= minLevel {
+		return fmt.Print(a...)
+	}
+	return 0, nil
+}
+
+func Println(minLevel int, a ...interface{}) (int, error) {
+	if LOG_LEVEL >= minLevel {
+		return fmt.Println(a...)
+	}
+	return 0, nil
+}
+
+func Printf(minLevel int, format string, a ...interface{}) (int, error) {
+	if LOG_LEVEL >= minLevel {
+		return fmt.Printf(format, a...)
+	}
+	return 0, nil
+}