On Tuesday, 12 May 2015 at 14:59:38 UTC, Gerald Jansen wrote:

The output of /usr/bin/time is as follows:

Lang Jobs    User  System  Elapsed %CPU
Py      2   79.24    2.16  0:48.90  166
D       2   19.41   10.14  0:17.96  164

Py     30 1255.17   58.38  2:39.54  823 * Pool(12)
D      30  421.61 4565.97  6:33.73 1241

The fact that most of the time is spent in System department is quite important. I suspect there are too many system calls from line-wise reading and writing the files. How many lines are read and written there?

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