I ran some tests on my dual-Xeon machine to see what speedup using
parallel gmake. After two builds to warm up the cache, I saw when
alternating gmake and gmake -j2:
gmake 0m57.207s
gmake -j2 0m44.305s
gmake 0m58.691s
gmake -j2 0m33.979s
As you can see, gmake -j2 is ~35% faster than gmake without -j. I will
be using -j from now on. -j3 shaves another second off.
FYI, I also use ccache for compiles.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
+ It's impossible for everything to be true. +