From 199da0fcfae6ce76e11efccd59f9c08fd28463df Mon Sep 17 00:00:00 2001
From: Jakub Pawlowicz <contact@jakubpawlowicz.com>
Date: Fri, 14 Nov 2014 19:51:07 +0000
Subject: [PATCH] Speeds up source maps by restoring escaped content only if
 needed.

---
 lib/selectors/source-map-stringifier.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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);
     }
-- 
2.34.1