For the best measure of elapsed time since python 3 3 use time perf counter.
Python count wall clock time.
It does include time elapsed during sleep and is system wide.
The precision depends on that of the c function of the same name but in any case this is the function to use for benchmarking python or timing algorithms.
Time clock method of time module in python is used to get the current processor time as a floating point number expressed in seconds.
Python s time library contains a predefined sleep function.
But it s generally at least under 20ms.
Time clock method also call c library function of the same name to get the result.
The first type of time is called cpu or execution time which measures how much time a cpu spent on executing a program.
Time module in python provides various time related functions.
On windows this function returns wall clock seconds elapsed since the first call to this function as a floating point number based on the win32 function queryperformancecounter.
On windows this function returns wall clock seconds elapsed since the first call to this function as a floating point number.
On unix return the current processor time as a floating point number expressed in seconds.
Perf counter function always returns the float value of time in seconds.
Pythom time method clock returns the current processor time as a floating point number expressed in seconds on unix.
Note that different systems will have different accuracy based on their internal clock setup ticks per second.
This function in combination with a loop serves as the python countdown timer.
A clock with the highest available resolution to measure a short duration.
A prerequisite before we dive into the difference of measuring time in python is to understand various types of time in the computing world.
Return the value in fractional seconds of a performance counter i e.
Return the value in fractional seconds of a performance counter i e.
As most of the functions defined in time module call corresponding c library function.
To measure time elapsed during program s execution either use time clock or time time functions.
The python docs state that this function should be used for benchmarking purposes.
The precision of returned float value depends on the called c library function.
The second type of time is called wall clock time which measures the total time to execute a program in a computer.
It does include time elapsed during sleep and is system wide.
The duration for which we want to delay the execution is passed as an argument to the sleep function in seconds.