How to find code execution time

[human]

If you are a PHP developer chances are many that you need to find how much time it took to execute a piece of code. Using the script below you can find how much time it took to execute your php code.

$time_start = microtime(true);

// execute your tasks here

$time_end = microtime(true);
$time = $time_end - $time_start;

echo "Code executed in $time seconds\n";

Via

[c4st0r]

Nice, I use it a lot...

ASP (VBScript).

<%
	Dim StartTime, EndTime, TotalTime
	StartTime = Timer() 

	'execute code

	EndTime = Timer() 

	TotalTime = EndTime-StartTime 'The result is given in seconds with miliseconds precision
%>

C#

	var sw = new Stopwatch();
	sw.Start();

	//execute code

	Console.WriteLine( "Execution time: {0} ms", sw.ElapsedMilliseconds );
	sw.Stop();

[human]

Thx c4st0r, a link to this page is added in the original page for ASP and C# versions of the code.


Can we add the code for other languages also here, so any developer who looks of similar code in their language of choice should come here?

[human]

For Javascript you can use this code.

var startDate = new Date();

// execute your tasks here

var endDate = new Date();

var timeTaken = endDate.getTime() - startDate.getTime();

alert('Time take to execute the script is '+timeTaken+' milliseconds');

[looserpedro]

startTime = Now
   'H = Hours
   'N = Minutes
   'S = Seconds
endTime = DateAdd("S",60,startTime)

Do Until Now >= endTime
    WScript.Echo Now
Loop

[c4st0r]

startTime = Now
   'H = Hours
   'N = Minutes
   'S = Seconds
endTime = DateAdd("S",60,startTime)

Do Until Now >= endTime
    WScript.Echo Now
Loop

Hey looserpedro,

Actually your code isn't gonna work for it, it's more like a "Pause Script" that will make the server looping for 60 seconds before continue the execution.

What we are showing here is scripts that identify the time of execution of the script, if you input a vbscript code to verify the execution time in your asp.net (vbscript) code, it probably gonna show exactly the 60s.

BTW, I would never use a loop for this kind of thing, even if you want to "pause" for awhile, loops like this takes the CPU use to 100%, its more like a DoS :P

cheers

[bulibuta]

Human, seeing how this developed into a multi-language topic, you might want to change the thread's title then.

[human]

Thx buli for noticing, changed.

Can anyone provide code for C,C++, ASM, Java, Perl, Pyton, Ruby, Shell script etc...

[noen]

Here is a small code for python

import time
from math import sqrt
def getMedian(numericValues): # From http://codecomments.wordpress.com/2008/03/17/simple-method-to-calculate-median-in-python/
        theValues = sorted(numericValues)

        if len(theValues) % 2 == 1:
                return theValues[(len(theValues)+1)/2-1]
        else:
                lower = theValues[len(theValues)/2-1]
                upper = theValues[len(theValues)/2]
                return (float(lower + upper)) / 2
def meanstdv(x): # From http://www.phys.uu.nl/~haque/computing/WPark_recipes_in_python.html
        n, mean, std = len(x), 0, 0
        for a in x:
                mean = mean + a
                mean = mean / float(n)
                for a in x:
                        std = std + (a - mean)**2
                        std = sqrt(std / float(n-1))
        return mean, std

def _TimeIt(func,*args,**kwargs):
        s_time = time.time()
        func(*args,**kwargs)
        e_time = time.time()
        return e_time - s_time
def TimeIt(func,*args,**kwargs):
        print "Execution time %f seconds" % _TimeIt(func,*args,**kwargs)

def TimeItStat(n,func,*args,**kwargs):
        if n <= 0: raise ValueError("n must be greater than zero")
        times = []
        for i in range(n):
                times.append( _TimeIt(func,*args,**kwargs) )
        mean, sd = meanstdv(times)
        med = getMedian(times)
        print "Execution time mean=%f med=%f best=%f worst=%f sd=%f" % (mean,med,min(times),max(times),sd)

# Example usage
def main(runTimes,hello=""):
        for i in range(runTimes):
                hello += hello

if __name__ == "__main__":
        TimeIt(main,25,hello="world")
        TimeItStat(10,main,25,hello="world")

And the output

$ python timeit.py
Execution time 0.465171 seconds
Execution time mean=0.052075 med=0.468760 best=0.468105 worst=0.469439 sd=0.205118

[c4st0r]

Python Simplified...

import time

startTime = time.clock()

#code, function, whatever you wanna mesure

endTime = time.clock()
print 'Code time %.6f seconds' % (endTime - startTime)

cheers