From c508616ec8d5b66bfd84415c83083fef7225ac11 Mon Sep 17 00:00:00 2001
From: Rich-Harris <richard.a.harris@gmail.com>
Date: Thu, 1 Dec 2016 11:16:16 -0500
Subject: [PATCH] optimisation - remove empty chunks when overwriting

---
 src/MagicString.js | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/MagicString.js b/src/MagicString.js
index da357b4..7fc93d1 100644
--- a/src/MagicString.js
+++ b/src/MagicString.js
@@ -330,15 +330,15 @@ MagicString.prototype = {
 		if ( first ) {
 			first.edit( content, storeName );
 
-			if ( first !== last ) {
-				let chunk = first.next;
-				while ( chunk !== last ) {
-					chunk.edit( '', false );
-					chunk = chunk.next;
-				}
-
-				chunk.edit( '', false );
+			if ( last ) {
+				first.next = last.next;
+			} else {
+				first.next = null;
+				this.lastChunk = first;
 			}
+
+			first.original = this.original.slice( start, end );
+			first.end = end;
 		}
 
 		else {