digitalmars.D.bugs - [Issue 5276] New: Template compilation slower than G++ 4.5
- d-bugmail puremagic.com (33/33) Nov 25 2010 http://d.puremagic.com/issues/show_bug.cgi?id=5276
- d-bugmail puremagic.com (7/7) Nov 25 2010 http://d.puremagic.com/issues/show_bug.cgi?id=5276
http://d.puremagic.com/issues/show_bug.cgi?id=5276 Summary: Template compilation slower than G++ 4.5 Product: D Version: D2 Platform: x86 OS/Version: Windows Status: NEW Keywords: performance Severity: enhancement Priority: P2 Component: DMD AssignedTo: nobody puremagic.com ReportedBy: bearophile_hugs eml.cc Created an attachment (id=832) D2 version of the benchmark This performance bug may share the same cause of bug 4900 If this turns out to be true then we may close this as resolved duplicated. In attach there are two programs that perform many computations at compile time using just templates, one written in C++ and one in D2. This is not idiomatic D code, because for this purpose CTFE is better, but it may be good enough as first performance benchmark for templates. Compilation time (N=7): G++ 0.95 seconds, dmd 12.4 seconds. G++ uses about 34 MB RAM, DMD about 130+ MB RAM. I have used MinGW 4.5.1 and DMD 2.050. Compilation: g++ nqueens_cpp.cpp -o nqueens_cpp dmd nqueens_d.d See also: http://cpptruths.blogspot.com/2010/03/faster-meta-programs-using-gcc-45-and.html -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Nov 25 2010
http://d.puremagic.com/issues/show_bug.cgi?id=5276 Created an attachment (id=833) C++ G++ 4.5 version of the benchmark -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Nov 25 2010