[Boost-commit] svn:boost r51594 - sandbox/reference_closure

Subject: [Boost-commit] svn:boost r51594 - sandbox/reference_closure
From: dave_at_[hidden]
Date: 2009-03-03 21:54:00

Author: dave
Date: 2009-03-03 21:54:00 EST (Tue, 03 Mar 2009)
New Revision: 51594
URL: http://svn.boost.org/trac/boost/changeset/51594

Log:
Lambdas would be known to be trivially copiable

Updated timing record to include speed ratios

Text files modified: 
   sandbox/reference_closure/timings.txt       |    18 ++++++++++++++++++                      
   sandbox/reference_closure/trivial_closure.h |    14 ++++++++++++++                          
   2 files changed, 32 insertions(+), 0 deletions(-)

Modified: sandbox/reference_closure/timings.txt
==============================================================================
--- sandbox/reference_closure/timings.txt	(original)
+++ sandbox/reference_closure/timings.txt	2009-03-03 21:54:00 EST (Tue, 03 Mar 2009)
@@ -10,6 +10,8 @@
 user	0m26.292s
 sys	0m0.056s
 
+t(std::function<>) / t(reference_closure): 22.7
+
 === Removed unrealistic indirection from lambda case ===
 
 execute trivial_nested
@@ -22,3 +24,19 @@
 user	0m27.443s
 sys	0m0.080s
 
+t(std::function<>) / t(reference_closure): 23.5
+
+=== Lambdas would be known to be trivially copiable ===
+
+execute trivial_nested
+real	0m1.175s
+user	0m1.166s
+sys	0m0.004s
+
+execute trivial_function
+real	0m4.871s
+user	0m4.836s
+sys	0m0.013s
+
+t(std::function<>) / t(reference_closure): 4.1
+

Modified: sandbox/reference_closure/trivial_closure.h
==============================================================================
--- sandbox/reference_closure/trivial_closure.h	(original)
+++ sandbox/reference_closure/trivial_closure.h	2009-03-03 21:54:00 EST (Tue, 03 Mar 2009)
@@ -22,4 +22,18 @@
   void operator()() { work( scope ); }
 };
 
+#include <tr1/functional>
+namespace std
+{ 
+  namespace tr1
+  {
+
+    template <>
+      struct __is_location_invariant<lambda>
+      : integral_constant<bool,true>
+      {};
+
+  }
+}
+
 #endif