[Performance] use inline typeof

Author: ljharb

lib/test.js

@@ -30,12 +30,11 @@ function getTestArgs(name_, opts_, cb_) {
 
 	for (var i = 0; i < arguments.length; i++) {
 		var arg = arguments[i];
-		var t = typeof arg;
-		if (t === 'string') {
+		if (typeof arg === 'string') {
 			name = arg;
-		} else if (t === 'object') {
+		} else if (typeof arg === 'object') {
 			opts = arg || opts;
-		} else if (t === 'function') {
+		} else if (typeof arg === 'function') {
 			cb = arg;
 		}
 	}