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rvagg/make.markdown

Created February 11, 2013 00:29
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node make -j X
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make.markdown

Node master, 4 core CPU with plenty of RAM.

$ make clean >& /dev/null; ./configure >& /dev/null ; date; make -j 4 >& /dev/null; date; make clean >& /dev/null; ./configure >& /dev/null; date; make -j 25 >& /dev/null; date
Mon Feb 11 11:21:11 EST 2013
Mon Feb 11 11:22:58 EST 2013
Mon Feb 11 11:22:59 EST 2013
Mon Feb 11 11:24:23 EST 2013
  • make -j4: 21:11 -> 22:58 = 107 seconds
  • make -j25: 22:59 -> 24:23 = 84 seconds
@rvagg
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rvagg commented Feb 11, 2013 

$ make distclean >& /dev/null; ./configure >& /dev/null ; date; make -j 4 >& /dev/null; date; make distclean >& /dev/null; ./configure >& /dev/null; date; make -j 25 >& /dev/null; date
Mon Feb 11 11:33:41 EST 2013
Mon Feb 11 11:35:29 EST 2013
Mon Feb 11 11:35:30 EST 2013
Mon Feb 11 11:36:56 EST 2013
  • make -j4: 33:41 -> 35:29 = 108 seconds
  • make -j25: 22:59 -> 24:23 = 86 seconds

@rvagg
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rvagg commented Feb 11, 2013

make -j1000 just for fun

$ make distclean >& /dev/null; ./configure >& /dev/null ; date; make -j 4 >& /dev/null; date; make distclean >& /dev/null; ./configure >& /dev/null; date; make -j 10000 >& /dev/null; date
Mon Feb 11 11:39:11 EST 2013
Mon Feb 11 11:40:58 EST 2013
Mon Feb 11 11:40:58 EST 2013
Mon Feb 11 11:42:25 EST 2013

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