c++ Programming Glossary: gettimeofday

Can placement new for arrays be used in a portable way?

http://stackoverflow.com/questions/15254/can-placement-new-for-arrays-be-used-in-a-portable-way

How can I measure CPU time and wall clock time on both Linux/Windows?

http://stackoverflow.com/questions/17432502/how-can-i-measure-cpu-time-and-wall-clock-time-on-both-linux-windows

sys time.h double get_wall_time struct timeval time if gettimeofday time NULL Handle error return 0 return double time.tv_sec double.. Counters CPU Time GetProcessTimes For Linux Wall Time gettimeofday CPU Time clock And here's a small demonstration #include math.h..

How to Calculate Execution Time of a Code Snippet in C++

http://stackoverflow.com/questions/1861294/how-to-calculate-execution-time-of-a-code-snippet-in-c

10^ 3 intervals return ret #else Linux struct timeval tv gettimeofday tv NULL uint64 ret tv.tv_usec Convert from micro seconds 10^..

Fastest way to get the integer part of sqrt(n)?

http://stackoverflow.com/questions/4930307/fastest-way-to-get-the-integer-part-of-sqrtn

double benchmark Func f size_t iterations f timeval a b gettimeofday a 0 for iterations 0 f gettimeofday b 0 return b.tv_sec unsigned.. f timeval a b gettimeofday a 0 for iterations 0 f gettimeofday b 0 return b.tv_sec unsigned int 1e6 b.tv_usec a.tv_sec unsigned..

How to get IOStream to perform better?

http://stackoverflow.com/questions/5166263/how-to-get-iostream-to-perform-better

C++ obtaining milliseconds time on Linux — clock() doesn't seem to work properly

http://stackoverflow.com/questions/588307/c-obtaining-milliseconds-time-on-linux-clock-doesnt-seem-to-work-properl

timer clock share improve this question You could use gettimeofday at the start and end of your method and then difference the..

Speed difference between If-Else and Ternary operator in C…?

http://stackoverflow.com/questions/6754454/speed-difference-between-if-else-and-ternary-operator-in-c

that is between 1x and 2x faster than If Else. My code is gettimeofday tv3 0 for i 0 i N i a i 1 if a a b else a c gettimeofday tv4.. gettimeofday tv3 0 for i 0 i N i a i 1 if a a b else a c gettimeofday tv4 0 gettimeofday tv1 0 for i 0 i N i a i 1 a a b c gettimeofday.. 0 for i 0 i N i a i 1 if a a b else a c gettimeofday tv4 0 gettimeofday tv1 0 for i 0 i N i a i 1 a a b c gettimeofday tv2 0 Sorry for..

Benchmarking (python vs. c++ using BLAS) and (numpy)

http://stackoverflow.com/questions/7596612/benchmarking-python-vs-c-using-blas-and-numpy

void Func dlsym handle sgemm_ I measure the time with gettimeofday like this gettimeofday start NULL f no_trans no_trans dim dim.. sgemm_ I measure the time with gettimeofday like this gettimeofday start NULL f no_trans no_trans dim dim dim one A dim B dim zero.. no_trans dim dim dim one A dim B dim zero Return dim gettimeofday end NULL dTimes j CalcTime start end where j is a loop running..

Finding out the CPU clock frequency (per core, per processor)

http://stackoverflow.com/questions/8351944/finding-out-the-cpu-clock-frequency-per-core-per-processor

can use in C C . This includes all of the following clock gettimeofday QueryPerformanceCounter etc... The list goes on and on. In other.. will be able to spoof all of them. For example clock and gettimeofday can be fooled by changing the system clock directly within the..

how to achieve 4 FLOPs per cycle

http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle

#include sys time.h double stoptime void struct timeval t gettimeofday t NULL return double t.tv_sec t.tv_usec 1000000.0 double addmul..