From a31b0fd7b6365a54b84dbb848dcf5055d677af6e Mon Sep 17 00:00:00 2001
From: Sune Simonsen <sune@we-knowhow.dk>
Date: Thu, 10 Sep 2015 22:58:52 +0200
Subject: [PATCH] Cache the outputEntry sizes and the line sizes

---
 lib/utils.js | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/lib/utils.js b/lib/utils.js
index 26481e6..698895b 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -10,25 +10,41 @@ var utils = {
     },
 
     calculateOutputEntrySize: function (outputEntry) {
+        if (outputEntry.size) {
+            return outputEntry.size;
+        }
+
+        var size;
         switch (outputEntry.style) {
         case 'text':
-            return { width: String(outputEntry.args.content).length, height: 1 };
+            size = { width: String(outputEntry.args.content).length, height: 1 };
+            break;
         case 'block':
-            return utils.calculateSize(outputEntry.args);
+            size = utils.calculateSize(outputEntry.args);
+            break;
         case 'raw':
             var arg = outputEntry.args;
-            return { width: arg.width, height: arg.height };
-        default: return { width: 0, height: 0 };
+            size = { width: arg.width, height: arg.height };
+            break;
+        default: size = { width: 0, height: 0 };
         }
+
+        outputEntry.size = size;
+        return size;
     },
 
     calculateLineSize: function (line) {
+        if (line.size) {
+            return line.size;
+        }
+
         var size = { height: 1, width: 0 };
         line.forEach(function (outputEntry) {
             var outputEntrySize = utils.calculateOutputEntrySize(outputEntry);
             size.width += outputEntrySize.width;
             size.height = Math.max(outputEntrySize.height, size.height);
         });
+        line.size = size;
         return size;
     },