From 74045beab561fb478f1047dc9427ac48a942d10f Mon Sep 17 00:00:00 2001
From: Felipe Zimmerle <fcosta@trustwave.com>
Date: Thu, 15 Oct 2015 14:04:35 -0300
Subject: [PATCH] Performance improvement while expanding macros

---
 src/macro_expansion.cc | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/macro_expansion.cc b/src/macro_expansion.cc
index 84ba18e8..b0de34cf 100644
--- a/src/macro_expansion.cc
+++ b/src/macro_expansion.cc
@@ -34,9 +34,15 @@ std::string MacroExpansion::expandKeepOriginal(const std::string& input,
 
 
 std::string MacroExpansion::expand(const std::string& input, Assay *assay) {
-    std::string res(input);
+    std::string res;
+    size_t pos = input.find("%{");
+
+    if (pos != std::string::npos) {
+        res = input;
+    } else {
+        return input;
+    }
 
-    size_t pos = res.find("%{");
     while (pos != std::string::npos) {
         size_t start = pos;
         size_t end = res.find("}");