Steffen Persvold authored 10 years ago and Markus Blatt committed 10 years ago

getrusage() is a very expensive system call and involves several
kernel locks. This prevents multithreaded applications from scaling
effectively. Using std:chrono::high_resolution_clock is portable
and very low cost in most cases.

[[Imported from SVN: r7095]]

[[Imported from SVN: r5849]]

[[Imported from SVN: r5848]]

* update Makefiles and configure

[[Imported from SVN: r5643]]

[[Imported from SVN: r5627]]

[[Imported from SVN: r5625]]

Nobody really tested this, why is it implemented then? 



[[Imported from SVN: r5252]]

Use C++ headers instead of C headers

[[Imported from SVN: r4783]]

[[Imported from SVN: r4000]]

[[Imported from SVN: r983]]

with up to microsecond-resolution (and doesn't need the HZ or CLK_TCK
define)

[[Imported from SVN: r949]]

use for time calculation. Now the method returns user+sys time which is the
time the process really needed. This time should be equal for diffrent  run
on the same machine, not depending on how busy the machine is.

[[Imported from SVN: r936]]

[[Imported from SVN: r926]]