CA.cpp, line 132:  NTracks = 20000;
CA.cpp, line 144:  NTimes = 100;

computer: computer with 2 Xeon X5550 processors at 2.7 GHz and 8 MB L3 cache, 48 GB RAM

Output:

(single core)
CA -perf:
NTracks   20000
time:       Real - 37.6874 [s],   CPU - 37.5922 [s]
time/track: Real - 18.8437 [us],  CPU - 18.7961 [us]

(all cores)
env ARBB_OPT_LEVEL=O3 CA -perf:
NTracks   20000
time:       Real - 20.4821 [s],   CPU - 214.003 [s]
time/track: Real - 10.2411 [us],  CPU - 107.001 [us]