diff options
| author | Wolf Bergenheim <ext-wolf.2.bergenheim@nokia.com> | 2010-10-20 12:37:51 +0300 |
|---|---|---|
| committer | Wolf Bergenheim <ext-wolf.2.bergenheim@nokia.com> | 2010-10-20 12:37:51 +0300 |
| commit | d9b16758c40d0e801ec5ecd707ace4b3451d331c (patch) | |
| tree | 8fd269baf3b7312103c9dc1b25fabda1dc949ea3 /resourceqt-client | |
| parent | 74c3aa649202a19dac0b24d3bb899cf317f9e9a2 (diff) | |
Using long integer only math in counting for performance
Diffstat (limited to 'resourceqt-client')
| -rw-r--r-- | resourceqt-client/time-stat.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/resourceqt-client/time-stat.c b/resourceqt-client/time-stat.c index c9801d2..f28ae02 100644 --- a/resourceqt-client/time-stat.c +++ b/resourceqt-client/time-stat.c @@ -18,8 +18,6 @@ License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *************************************************************************/ - -#include <math.h> #include "time-stat.h" static struct timespec start_time; @@ -39,17 +37,28 @@ long int stop_timer(void) { struct timespec end_time; int r; - double milliseconds = 0.0; + long int milliseconds = 0L; r = clock_gettime(CLOCK_REALTIME, &end_time); if (r == 0) { - milliseconds = 1000.0 * (end_time.tv_sec - start_time.tv_sec) + - (end_time.tv_nsec - start_time.tv_nsec) / 1000000.0; + struct timespec temp; + if (end_time.tv_nsec < start_time.tv_nsec) { + temp.tv_sec = end_time.tv_sec - start_time.tv_sec - 1; + temp.tv_nsec = 1000000000 + end_time.tv_nsec - start_time.tv_nsec; + } else { + temp.tv_sec = end_time.tv_sec - start_time.tv_sec; + temp.tv_nsec = end_time.tv_nsec - start_time.tv_nsec; + } + + milliseconds = 1000 * temp.tv_sec + temp.tv_nsec / 1000; + if (temp.tv_nsec % 1000 > 500) { + ++milliseconds; + } } start_time.tv_sec = 0; start_time.tv_nsec = 0; - return lround(milliseconds); + return milliseconds; } |