clock

For timing an algorithm (approximately in ms), which of these two approaches is better: clock_t start = clock(); algorithm(); clock_t end = clock(); double time = (double) (end-start) / CLOCKS_PER_SEC * 1000.0; Or, time_t start = time(0); algorithm(); time_t end = time(0); double time = difftime(end, start) * 1000.0; Also, from some discussion in the C++ channel at Freenode, I know clock has a very bad resolution, so the timing will be zero for a (relatively) fast algorithm. But, which has better resolution time() or clock()? Or is it the same? It depends what you want: time measures the real

Is it possible to detect if user's machine is using 12 hour clock (am/pm) or 24 hour clock (military time)? One way would be to check users locales, but then it is just massive list of locale comparison and someone from U.S who wants 12 hour clock can send me just en locale, not US_en and I have no way of knowing her preferences. At the same time someone from U.S might be set her machine to use 12 hour time format and doesn't want 12 hour clock. EDIT: date.toLocaleTimeString(); Would work it theory, as user Mouser suggested below, but unfortunately it's bugged on WebKit browsers (tested on

In Linux how is the Clock Architecture implemented. There is a file include/linux/clkdev.h struct clk_lookup { struct list_head node; const char *dev_id; const char *con_id; struct clk *clk; }; What are the various fields and it is extensively used in Clock architecture in arch/arm/Board***/... ? The generic Linux clock infra-structure is documented in clk.txt . For the ARM, Sasha Hauer created the common clock frame-work recently (last two years). The clocks are structured in a parent/child relation. Typical SOC (system on chip) has main clocks created from a crystal which are either scaled

Quick Question . for MPI implementation of my code ,i am getting a huge difference in both. I know MPI_Wtime is the real time elapsed by each processor and clock() gives a rough idea of the expected time . Do anyone wants to add some assertion ? The clock function is utterly useless. It measures cpu time, not real time/wall time, and moreover it has the following serious issues: On most implementations, the resolution is extremely bad, for example, 1/100 of a second. CLOCKS_PER_SECOND is not the resolution, just the scale. With typical values of CLOCKS_PER_SECOND (Unix standards require it to

I want to implement a clock within my program to diusplay the date and time while the program is running. I have looked into the getCurrentTime() method and Timer s but none of them seem to do what I would like. The problem is I can get the current time when the program loads but it never updates. Any suggestions on something to look into would be greatly appreciated! jjnguy What you need to do is use Swing's Timer class. Just have it run every second and update the clock with the current time. Timer t = new Timer(1000, updateClockAction); t.start(); This will cause the updateClockAction to

i have some clock script. Everything is fine and it's work perfectly but... i have one problem. If at the clock is set one digit hour or minute like 1:5 clock not adding "0" digit before. This what i'v done but it does't work. Can u help me, much thx? window.setInterval(function update_clock() { var currentTime = new Date(); var currentHours = currentTime.getHours(); var currentMinutes = currentTime.getMinutes(); $.ajax({ success: function (clock) { document.getElementById("hour").firstChild.nodeValue = currentHours; document.getElementById("minutes").firstChild.nodeValue = currentMinutes; if