From: Jakub Pawlowicz <contact@jakubpawlowicz.com>
Date: Fri, 14 Nov 2014 19:51:07 +0000 (+0000)
Subject: Speeds up source maps by restoring escaped content only if needed.
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=199da0fcfae6ce76e11efccd59f9c08fd28463df;p=clean-css.git

Speeds up source maps by restoring escaped content only if needed.
---

diff --git a/lib/selectors/source-map-stringifier.js b/lib/selectors/source-map-stringifier.js
index ba2c4fb8..894f80b6 100644
--- a/lib/selectors/source-map-stringifier.js
+++ b/lib/selectors/source-map-stringifier.js
@@ -92,7 +92,9 @@ SourceMapStringifier.prototype.toString = function (tokens) {
       track(context, token);
       output.push(token);
     } else {
-      var val = self.restoreCallback(token.value);
+      var val = token.value.indexOf('_') > -1 ?
+        self.restoreCallback(token.value) :
+        token.value;
       track(context, val, token.metadata);
       output.push(val);
     }