Code:

sh-4.2$ g++ a.cpp
sh-4.2$ ./a.out
Time of one iteration = 2.6495 s, computation result = 9.366910e+08
Time of one iteration = 2.6481 s, computation result = 5.707878e+08
Time of one iteration = 2.6480 s, computation result = 4.978989e+08
Time of one iteration = 2.6479 s, computation result = 1.190977e+09
Time of one iteration = 2.6481 s, computation result = 9.298645e+08
Time of one iteration = 2.6478 s, computation result = 1.552897e+08
Time of one iteration = 2.6478 s, computation result = 1.710884e+09
Time of one iteration = 2.6477 s, computation result = 2.023878e+09
Time of one iteration = 2.6482 s, computation result = 1.185668e+09
Time of one iteration = 2.6480 s, computation result = 1.627396e+09
Time of one iteration = 2.6479 s, computation result = 1.285587e+09
Time of one iteration = 2.6479 s, computation result = 1.284789e+09
Time of one iteration = 2.6480 s, computation result = 5.410588e+07
Time of one iteration = 2.6480 s, computation result = 8.577717e+08
Time of one iteration = 2.6479 s, computation result = 1.333628e+09
Time of one iteration = 2.6480 s, computation result = 6.056444e+08
Time of one iteration = 2.6482 s, computation result = 1.130641e+09
Time of one iteration = 2.6480 s, computation result = 8.075440e+08
Time of one iteration = 2.6480 s, computation result = 1.071738e+09
Time of one iteration = 2.6481 s, computation result = 1.497799e+09
Time of one iteration = 2.6482 s, computation result = 6.832906e+08
Time of one iteration = 2.6480 s, computation result = 1.850542e+09
Time of one iteration = 2.6479 s, computation result = 2.099904e+09
Time of one iteration = 2.6479 s, computation result = 6.601369e+08
Time of one iteration = 2.6480 s, computation result = 1.654135e+09
Time of one iteration = 2.6482 s, computation result = 1.265377e+09
Time of one iteration = 2.6480 s, computation result = 7.491475e+08
Time of one iteration = 2.6481 s, computation result = 1.618072e+09
Time of one iteration = 2.6479 s, computation result = 9.804571e+08
Time of one iteration = 2.6482 s, computation result = 9.666316e+08
Time of one iteration = 2.6481 s, computation result = 1.076384e+09
Time of one iteration = 2.6480 s, computation result = 1.915146e+09
Time of one iteration = 2.6481 s, computation result = 1.325639e+09
Time of one iteration = 2.6479 s, computation result = 1.309158e+09
Time of one iteration = 2.6481 s, computation result = 1.040363e+09
Time of one iteration = 2.6480 s, computation result = 8.497754e+08
Time of one iteration = 2.6481 s, computation result = 2.008792e+09
Time of one iteration = 2.6480 s, computation result = 3.436796e+08
Time of one iteration = 2.6480 s, computation result = 4.997928e+08
Time of one iteration = 2.6477 s, computation result = 1.252841e+09
Time of one iteration = 2.6481 s, computation result = 1.206959e+09
Time of one iteration = 2.6478 s, computation result = 1.049436e+09
Time of one iteration = 2.6480 s, computation result = 9.855468e+07
Time of one iteration = 2.6482 s, computation result = 1.643193e+09
Time of one iteration = 2.6480 s, computation result = 1.217729e+09
Time of one iteration = 2.6482 s, computation result = 4.503854e+08
Time of one iteration = 2.6479 s, computation result = 1.326227e+09
Time of one iteration = 2.6479 s, computation result = 1.415164e+09
Time of one iteration = 2.6479 s, computation result = 9.095195e+08
Time of one iteration = 2.6477 s, computation result = 1.485605e+09
Time of one iteration = 2.6481 s, computation result = 4.506785e+08
Time of one iteration = 2.6480 s, computation result = 1.261918e+09
Time of one iteration = 2.6480 s, computation result = 2.026706e+09
Time of one iteration = 2.6481 s, computation result = 7.786600e+08
Time of one iteration = 2.6481 s, computation result = 1.524530e+09
Time of one iteration = 2.6476 s, computation result = 1.570667e+09
Time of one iteration = 2.6481 s, computation result = 1.206787e+09
Time of one iteration = 2.6478 s, computation result = 1.250838e+09
Time of one iteration = 2.6480 s, computation result = 2.095063e+09
Time of one iteration = 2.6481 s, computation result = 1.865386e+09
Time of one iteration = 2.6480 s, computation result = 3.281944e+08
Time of one iteration = 2.6480 s, computation result = 1.132857e+09
Time of one iteration = 2.6478 s, computation result = 6.180122e+08
Time of one iteration = 2.6479 s, computation result = 6.900676e+08
Time of one iteration = 2.6479 s, computation result = 1.615849e+09
Time of one iteration = 2.6481 s, computation result = 1.126033e+09
Time of one iteration = 2.6479 s, computation result = 2.139742e+09
Time of one iteration = 2.6478 s, computation result = 1.894477e+08
Time of one iteration = 2.6477 s, computation result = 1.631572e+09
Time of one iteration = 2.6479 s, computation result = 8.535685e+08
Time of one iteration = 2.6481 s, computation result = 1.273882e+09
Time of one iteration = 2.6482 s, computation result = 1.660796e+08
Time of one iteration = 2.6482 s, computation result = 1.038502e+09
Time of one iteration = 2.6482 s, computation result = 5.600697e+07
Time of one iteration = 2.6482 s, computation result = 1.619022e+09
Time of one iteration = 2.6481 s, computation result = 6.123897e+08
Time of one iteration = 2.6481 s, computation result = 8.961824e+08
Time of one iteration = 2.6483 s, computation result = 1.648120e+09
Time of one iteration = 2.6481 s, computation result = 1.074455e+09
Time of one iteration = 2.6481 s, computation result = 1.626155e+09
Time of one iteration = 2.6482 s, computation result = 1.550417e+09
Time of one iteration = 2.6483 s, computation result = 1.369261e+08
Time of one iteration = 2.6479 s, computation result = 2.025879e+09
Time of one iteration = 2.6481 s, computation result = 4.188721e+08
Time of one iteration = 2.6482 s, computation result = 1.167625e+09
Time of one iteration = 2.6483 s, computation result = 1.395522e+09
Time of one iteration = 2.6480 s, computation result = 1.273302e+09
Time of one iteration = 2.6481 s, computation result = 1.901946e+09
Time of one iteration = 2.6478 s, computation result = 9.852336e+08
Time of one iteration = 2.6482 s, computation result = 1.411876e+09
Time of one iteration = 2.6481 s, computation result = 1.194318e+09
Time of one iteration = 2.6479 s, computation result = 9.078349e+07
Time of one iteration = 2.6480 s, computation result = 3.560195e+08
Time of one iteration = 2.6480 s, computation result = 1.043311e+08
Time of one iteration = 2.6480 s, computation result = 8.975936e+08
Time of one iteration = 2.6482 s, computation result = 1.611007e+09
Time of one iteration = 2.6481 s, computation result = 1.073908e+09
Time of one iteration = 2.6480 s, computation result = 1.342637e+09
Time of one iteration = 2.6482 s, computation result = 8.293112e+08
Time of one iteration = 2.6482 s, computation result = 2.042515e+09
Time of one iteration = 2.6481 s, computation result = 1.620367e+09
Time of one iteration = 2.6481 s, computation result = 9.631723e+08
Time of one iteration = 2.6481 s, computation result = 1.870537e+09
Time of one iteration = 2.6480 s, computation result = 2.074187e+09
Time of one iteration = 2.6481 s, computation result = 9.977173e+08
Time of one iteration = 2.6482 s, computation result = 1.094236e+09
Time of one iteration = 2.6484 s, computation result = 2.101217e+09
Time of one iteration = 2.6481 s, computation result = 4.879628e+08
Time of one iteration = 2.6483 s, computation result = 1.372519e+08
Time of one iteration = 2.6480 s, computation result = 1.352022e+09
Time of one iteration = 2.6480 s, computation result = 1.427920e+09
Time of one iteration = 2.6480 s, computation result = 8.491647e+08
Time of one iteration = 2.6480 s, computation result = 1.062124e+09
Time of one iteration = 2.6480 s, computation result = 4.722387e+08
Time of one iteration = 2.6480 s, computation result = 9.563156e+08
Time of one iteration = 2.6481 s, computation result = 1.815737e+09
^C
sh-4.2$

As you can see there's very little variation in time of each iteration (out of >100). Unfortunately I cannot reproduce
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