speed up has_parens() (#3014)

2018-03-24 04:05:28 +08:00
parent 12985d86c2
commit b1410be443
1 changed files with 1 additions and 1 deletions
--- a/lib/output.js
+++ b/lib/output.js
@@ -576,7 +576,7 @@ function OutputStream(options) {
        indentation     : function() { return indentation },
        current_width   : function() { return current_col - indentation },
        should_break    : function() { return options.width && this.current_width() >= options.width },
-        has_parens      : function() { return OUTPUT.slice(-1) == "(" },
+        has_parens      : function() { return OUTPUT[OUTPUT.length - 1] == "(" },
        newline         : newline,
        print           : print,
        space           : space,