Cache regex results when comparing mdoc Nodes during sorting. This avoids the creatio...

diff --git a/mcs/tools/monodoc/Monodoc/provider.cs b/mcs/tools/monodoc/Monodoc/provider.cs
index 9d33338ad8ea340692caca9eedf98ee5e3315410..d79ce079e192b68c007443df35e503136f3997f1 100644 (file)
--- a/mcs/tools/monodoc/Monodoc/provider.cs
+++ b/mcs/tools/monodoc/Monodoc/provider.cs
@@ -24,7 +24,6 @@ using System.Collections;
 using System.Diagnostics;
 using System.Configuration;
 using System.Reflection;
-using System.Text.RegularExpressions;
 using System.Xml;
 using System.Xml.XPath;
 using ICSharpCode.SharpZipLib.Zip;
@@ -133,6 +132,7 @@ public class Node : IComparable {
        Node parent;
        protected ArrayList nodes;
        protected internal int position;
+       string compare_key;
 
        static ArrayList empty = ArrayList.ReadOnly(new ArrayList(0));
 
@@ -394,14 +394,19 @@ public class Node : IComparable {
                        LoadNode ();
                if (other.position < 0)
                        other.LoadNode ();
-
-               Regex digits = new Regex (@"([\d]+)|([^\d]+)");
-               MatchEvaluator eval = delegate (Match m) {
-                       return (m.Value.Length > 0 && char.IsDigit (m.Value [0])) 
+               if (compare_key == null || other.compare_key == null) {
+                       Regex digits = new Regex (@"([\d]+)|([^\d]+)");
+                       MatchEvaluator eval = delegate (Match m) {
+                               return (m.Value.Length > 0 && char.IsDigit (m.Value [0]))
                                ? m.Value.PadLeft (System.Math.Max (caption.Length, other.caption.Length)) 
                                : m.Value;
-               };
-               return digits.Replace (caption, eval).CompareTo (digits.Replace (other.caption, eval));
+                       };
+                       if (compare_key == null)
+                               compare_key = digits.Replace (caption, eval);
+                       if (other.compare_key == null)
+                               other.compare_key = digits.Replace (other.caption, eval);
+               }
+               return compare_key.CompareTo (other.compare_key);
        }
 }