This can be done when using SHOW PROFILES syntax. When you open a MySQL session, you could set the variable “profiling” to 1 or ON. mysql> SET profiling = 1; So all the statements sent to the server will be profiled and stored in a historical and shown later by typing the command: mysql> SHOW … Read more
I’m one of those who prefers words to punctuation — it’s one of the reasons I’ve picked Python over Perl, for example. “Life is better without braces” (an old Python motto which went on a T-shirt with a cartoon of a smiling teenager;-), after all (originally intended to refer to braces vs indentation for grouping, … Read more
For a portable solution, you can use boost::asio. Below is a demo I wrote a while ago. You can change t.expires_from_now(boost::posix_time::seconds(1)); to suit you need say make function call after 200 milliseonds. t.expires_from_now(boost::posix_time::milliseconds(200)); Below is a complete working example. It’s calling repeatedly but I think it should be easy to call only once by just … Read more
Don’t use a property in this case. A property object is a data descriptor, which means that any access to instance.var will invoke that descriptor and Python will never look for an attribute on the instance itself. You have two options: use the .__setattr__() hook or build a descriptor that only implements .__set__. Using the … Read more
If you mean in psql, rather than some program you are writing, use \? for the help, and see: \timing [on|off] toggle timing of commands (currently off) And then you get output like: # \timing on Timing is on. # select 1234; ?column? ———- 1234 (1 row) Time: 0.203 ms
It won’t necessarily run right away, neither will explicitly setting the delay to 0. The reason is that setTimeout removes the function from the execution queue and it will only be invoked after JavaScript has finished with the current execution queue. console.log(1); setTimeout(function() {console.log(2)}); console.log(3); console.log(4); console.log(5); //console logs 1,3,4,5,2 for more details see http://javascriptweblog.wordpress.com/2010/06/28/understanding-javascript-timers/
I think this should work: #include <time.h> clock_t start = clock(), diff; ProcessIntenseFunction(); diff = clock() – start; int msec = diff * 1000 / CLOCKS_PER_SEC; printf(“Time taken %d seconds %d milliseconds”, msec/1000, msec%1000);
Insert a time.sleep(0.01) to wait 10 millis between each time poll otherwise your loop polls time continuously without releasing power to the cpu. Edit: That is better, only waits once if needed. Should a huge CPU overload occur, the time to wait could be negative, and in that case 2 actions could be triggered at … Read more
The Mach kernel provides access to system clocks, out of which at least one (SYSTEM_CLOCK) is advertised by the documentation as being monotonically incrementing. #include <mach/clock.h> #include <mach/mach.h> clock_serv_t cclock; mach_timespec_t mts; host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock); clock_get_time(cclock, &mts); mach_port_deallocate(mach_task_self(), cclock); mach_timespec_t has nanosecond precision. I’m not sure about the accuracy, though. Mac OS X supports three … Read more
What you are experiencing is a Chrome bug (and even two). Basically, when the pool of requestAnimationFrame callbacks is empty, they’ll call it directly at the end of the current event loop, without waiting for the actual painting frame as the specs require. To workaround this bug, you can keep an ever-going requestAnimationFrame loop, but … Read more