On Nov 14, 2006, at 12:49, Bill Wendling wrote:
I'll mention a case where compilation was wickedly slow even when using -j#. At The MathWorks, the system could take >45 minutes to compile. (This was partially due to the fact that the files were located on an NFS mounted drive. But also because C++ compilation is way slower than C compilation.) Experiments with distributed make showed promise.
When using -j#, with enough parellel processes and assuming sufficient memory,
you should be able to reach the point where you're either limited by the NFS server or by CPU availability. No amount of threading in the compiler will remove either bottleneck. -Geert
