From b7022514313c41df469723f814681b74fa32f3c6 Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Sun, 8 Jul 2012 14:38:13 -0400
Subject: [PATCH] Performance

- When there is only one element in A3, no point firing up the Dijkstra
  shunt of the infix processing.
---
 src/A3.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/A3.cpp b/src/A3.cpp
index f64018459..607e927ac 100644
--- a/src/A3.cpp
+++ b/src/A3.cpp
@@ -892,6 +892,9 @@ const A3 A3::tokenize (const A3& input) const
 //
 const A3 A3::infix (const A3& input) const
 {
+  if (input.size () == 1)
+    return input;
+
   Arg previous ("?", Arg::cat_op);
 
   A3 modified;
@@ -1229,6 +1232,9 @@ const A3 A3::sequence (const A3& input) const
 //
 const A3 A3::postfix (const A3& input) const
 {
+  if (input.size () == 1)
+    return input;
+
   A3 converted;
   converted._limit = input._limit;