On 01/03/2014 03:28 PM, Jeroen Demeyer wrote:
On 2014-01-03 01:44, P Purkayastha wrote:
The parallel build in sage compiles
different packages in parallel, but each package still compiles as -j1.
That statement is completely not true. Sage uses both, it compiles
different packages in parallel and also builds the packages itself in
parallel (if the package supports it).

Jeroen.


Then I am very surprised; for two reasons - I have never seen more than one gcc process on htop while running a sage compilation with -j2 or -j4 -- maybe it has always just so happened that every time I looked at htop, it was a package without support for -j. Secondly, it is nowhere mentioned in the README that both sage packages and compilation within each individual package are launched as -j.

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