diff --git a/performance/command_line.cpp b/performance/command_line.cpp
index 2e79cdb6..6b188c51 100644
--- a/performance/command_line.cpp
+++ b/performance/command_line.cpp
@@ -54,12 +54,14 @@ double boost_total = 0;
 double locale_boost_total = 0;
 double posix_total = 0;
 double pcre_total = 0;
+double xpressive_total = 0;
 unsigned greta_test_count = 0;
 unsigned safe_greta_test_count = 0;
 unsigned boost_test_count = 0;
 unsigned locale_boost_test_count = 0;
 unsigned posix_test_count = 0;
 unsigned pcre_test_count = 0;
+unsigned xpressive_test_count = 0;
 
 int handle_argument(const std::string& what)
 {
@@ -261,6 +263,10 @@ void output_html_results(bool show_description, const std::string& tagname)
 #ifdef BOOST_HAS_PCRE
       if(time_pcre == true)
          os << "<td><strong>PCRE</strong></td>";
+#endif
+#ifdef BOOST_HAS_XPRESSIVE
+      if(time_xpressive == true)
+         os << "<td><strong>Dynamic Xpressive</strong></td>";
 #endif
       os << "</tr>\n";
 
@@ -305,6 +311,7 @@ void output_html_results(bool show_description, const std::string& tagname)
                ++boost_test_count;
             }
          }
+#endif
          if(time_localised_boost == true)
          {
             print_result(os, first->localised_boost_time, first->factor);
@@ -314,7 +321,6 @@ void output_html_results(bool show_description, const std::string& tagname)
                ++locale_boost_test_count;
             }
          }
-#endif
          if(time_posix == true)
          {
             print_result(os, first->posix_time, first->factor);
@@ -334,6 +340,17 @@ void output_html_results(bool show_description, const std::string& tagname)
                ++pcre_test_count;
             }
          }
+#endif
+#if defined(BOOST_HAS_XPRESSIVE)
+         if(time_xpressive == true)
+         {
+            print_result(os, first->xpressive_time, first->factor);
+            if(first->xpressive_time > 0)
+            {
+               xpressive_total += first->xpressive_time / first->factor;
+               ++xpressive_test_count;
+            }
+         }
 #endif
          os << "</tr>\n";
          ++first;
@@ -400,6 +417,12 @@ std::string get_averages_table()
    {
       os << "<td><strong>PCRE</strong></td>";
    }
+#endif
+#ifdef BOOST_HAS_XPRESSIVE
+   if(time_xpressive == true)
+   {
+      os << "<td><strong>Dynamic Xpressive</strong></td>";
+   }
 #endif
    os << "</tr>\n";
 
@@ -416,14 +439,18 @@ std::string get_averages_table()
 #if defined(BOOST_HAS_POSIX)
    if(time_boost == true)
       os << "<td>" << (boost_total / boost_test_count) << "</td>\n";
+#endif
    if(time_localised_boost == true)
       os << "<td>" << (locale_boost_total / locale_boost_test_count) << "</td>\n";
-#endif
    if(time_posix == true)
       os << "<td>" << (posix_total / posix_test_count) << "</td>\n";
 #if defined(BOOST_HAS_PCRE)
    if(time_pcre == true)
       os << "<td>" << (pcre_total / pcre_test_count) << "</td>\n";
+#endif
+#if defined(BOOST_HAS_XPRESSIVE)
+   if(time_xpressive == true)
+      os << "<td>" << (xpressive_total / xpressive_test_count) << "</td>\n";
 #endif
    os << "</tr>\n";
    os << "</table>\n";
diff --git a/performance/time_boost.cpp b/performance/time_boost.cpp
index 2e7dc24c..b6ca08af 100644
--- a/performance/time_boost.cpp
+++ b/performance/time_boost.cpp
@@ -53,6 +53,13 @@ double time_match(const std::string& re, const std::string& text, bool icase)
 bool dummy_grep_proc(const boost::smatch&)
 { return true; }
 
+struct noop
+{
+    void operator()( boost::smatch const & ) const
+    {
+    }
+};
+
 double time_find_all(const std::string& re, const std::string& text, bool icase)
 {
    boost::regex e(re, (icase ? boost::regex::perl | boost::regex::icase : boost::regex::perl));
@@ -67,7 +74,9 @@ double time_find_all(const std::string& re, const std::string& text, bool icase)
       tim.restart();
       for(counter = 0; counter < iter; ++counter)
       {
-         boost::regex_grep(&dummy_grep_proc, text, e);
+         boost::sregex_iterator begin( text.begin(), text.end(), e ), end;
+         std::for_each( begin, end, noop() );
+         //boost::regex_grep(&dummy_grep_proc, text, e);
       }
       result = tim.elapsed();
       iter *= 2;
diff --git a/performance/time_dynamic_xpressive.cpp b/performance/time_dynamic_xpressive.cpp
index 0e624037..297a59d6 100644
--- a/performance/time_dynamic_xpressive.cpp
+++ b/performance/time_dynamic_xpressive.cpp
@@ -13,6 +13,7 @@
 
 #ifdef BOOST_HAS_XPRESSIVE
 #include <cassert>
+#include <iostream>
 #include <boost/timer.hpp>
 #include <boost/xpressive/xpressive.hpp>
 
@@ -21,6 +22,7 @@ namespace dxpr
 
 double time_match(const std::string& re, const std::string& text, bool icase)
 {
+   try{
    boost::xpressive::sregex e;
    e = (icase ? 
             boost::xpressive::sregex(boost::xpressive::sregex::compile(re))
@@ -56,6 +58,12 @@ double time_match(const std::string& re, const std::string& text, bool icase)
         result = (std::min)(run, result);
     }
     return result / iter;
+   }
+   catch(const std::exception& e)
+   {
+      std::cout << "Exception: " << e.what() << std::endl;
+      return -1;
+   }
 }
 
 struct noop
@@ -67,6 +75,7 @@ struct noop
 
 double time_find_all(const std::string& re, const std::string& text, bool icase)
 {
+   try{
    boost::xpressive::sregex e;
    e = (icase ? 
             boost::xpressive::sregex(boost::xpressive::sregex::compile(re))
@@ -106,6 +115,12 @@ double time_find_all(const std::string& re, const std::string& text, bool icase)
         result = (std::min)(run, result);
     }
     return result / iter;
+   }
+   catch(const std::exception& e)
+   {
+      std::cout << "Exception: " << e.what() << std::endl;
+      return -1;
+   }
 }
 
 }
diff --git a/performance/time_localised_boost.cpp b/performance/time_localised_boost.cpp
index 33266e2a..d2a27bf4 100644
--- a/performance/time_localised_boost.cpp
+++ b/performance/time_localised_boost.cpp
@@ -53,6 +53,13 @@ double time_match(const std::string& re, const std::string& text, bool icase)
 bool dummy_grep_proc(const boost::smatch&)
 { return true; }
 
+struct noop
+{
+    void operator()( boost::smatch const & ) const
+    {
+    }
+};
+
 double time_find_all(const std::string& re, const std::string& text, bool icase)
 {
    boost::basic_regex<char, boost::cpp_regex_traits<char> > e(re, (icase ? boost::regex::perl | boost::regex::icase : boost::regex::perl));
@@ -67,7 +74,12 @@ double time_find_all(const std::string& re, const std::string& text, bool icase)
       tim.restart();
       for(counter = 0; counter < iter; ++counter)
       {
-         boost::regex_grep(&dummy_grep_proc, text, e);
+         boost::regex_iterator<
+            std::string::const_iterator, 
+            char, 
+            boost::cpp_regex_traits<char> > begin( text.begin(), text.end(), e ), end;
+         std::for_each( begin, end, noop() );
+         //boost::regex_grep(&dummy_grep_proc, text, e);
       }
       result = tim.elapsed();
       iter *= 2;