Hi, I just got a new box setup for development and was shocked to find out that make 3.99.XX is about 50% slower than on my old box.
The test I run is an up-to-date check on a fairly large non-recursive build system. The hardware is as follows: Old: Xeon E5520 2.3GHz, 24G RAM, SAS2 spinning disks New: Xeon E5-2630 2.3GHz, 64G RAM, SSD disks I don't believe disk performance is an issue here since everything has been cached into memory (the test is run multiple times). The same up-to-date check takes 0.5s on my old box and 0.73s on the new one. In fact, the performance improvement I observed compared to 3.82 is completely wiped out on the new box; both versions take about the same time. I tried to build make with various C compilers (GCC 4.7, 4.8, Clang 3.3) and with various optimization options (-O3, -march=native) as well as run the same binary on both machines, all without any difference. Also this is not a general problem with the new box. It is faster than the old. For example, C compilation is about 30% faster. Needless to say, this is bad news for me since now I have to wait longer for make to even start the compilation. So any ideas here are welcome. Boris -- Boris Kolpackov, Code Synthesis http://codesynthesis.com/~boris/blog Compiler-based ORM system for C++ http://codesynthesis.com/products/odb _______________________________________________ Bug-make mailing list Bug-make@gnu.org https://lists.gnu.org/mailman/listinfo/bug-make
