{"id":33166,"date":"2021-04-12T11:28:47","date_gmt":"2021-04-12T11:28:47","guid":{"rendered":"https:\/\/stackify.com\/?p=33166"},"modified":"2023-05-01T17:15:51","modified_gmt":"2023-05-01T17:15:51","slug":"why-python-cprofile-is-the-recommended-profiling-interface","status":"publish","type":"post","link":"https:\/\/stackify.com\/why-python-cprofile-is-the-recommended-profiling-interface\/","title":{"rendered":"Why Python cProfile is the Recommended Profiling Interface"},"content":{"rendered":"\n<p>Performance optimization is a basic need for software development. When it comes to optimizing app performance,&nbsp; tracking frequency, maintaining production, or perpetuation method calls, profilers play a vital role. Learn why Python cProfile is a recommended profiling interface and how it enhances your software performance.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Python profiling&nbsp; has three critical parts including:<\/li>\n\n\n\n<li>Definition &amp; explanation;<\/li>\n\n\n\n<li>Tools&nbsp; for a generic app developed using Python language;<\/li>\n\n\n\n<li><a href=\"https:\/\/stackify.com\/what-is-apm\/\">APM<\/a> (application performance monitoring) tools<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Python cProfile:&nbsp;Optimize Software Development Requirements<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.statista.com\/statistics\/793628\/worldwide-developer-survey-most-used-languages\/\">Statista report shows<\/a> that Java and Python rank among the top five widely-used <a href=\"https:\/\/stackify.com\/top-10-future-programming-languages\/\">programming languages<\/a>. When it comes to developing an app with Python, developers need to focus on the profiling interface&nbsp; to improve project performance.<\/p>\n\n\n\n<p>One way to improve Python application performance is through &nbsp; cProfile.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What is cProfile?<\/h2>\n\n\n\n<p>cProfile is an advanced library that&nbsp; tracks functions to generate a list of the most often called functions. cProfile is beneficial to development because: :<\/p>\n\n\n\n<p>1. Provides&nbsp; a standard library;<\/p>\n\n\n\n<p>2. Tracks different statistics call behavior;<\/p>\n\n\n\n<p>3. Developers&nbsp; can use cProfile without restrictions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Simple cProfile Program Example:<\/strong><\/h3>\n\n\n\n<p>from simul import benchmark<\/p>\n\n\n\n<p>import cProfile<\/p>\n\n\n\n<p>pr = cProfile.Profile()<\/p>\n\n\n\n<p>pr.enable()<\/p>\n\n\n\n<p>benchmark()<\/p>\n\n\n\n<p>pr.disable()<\/p>\n\n\n\n<p>pr.print_stats()<\/p>\n\n\n\n<p><strong>Code: (<\/strong><a href=\"https:\/\/stackoverflow.com\/questions\/51536411\/saving-cprofile-results-to-readable-external-file\"><strong>Source<\/strong><\/a><strong>)<\/strong><\/p>\n\n\n\n<p>When you using cProfile you will output into five different columns, these includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ncalls: Ncalls indicate the number of times each function was called in the program.<\/li>\n\n\n\n<li>tottime: Tottime shows the total time spent with the position before jumping&nbsp; to another process.<\/li>\n\n\n\n<li>cumtime: cumtime&nbsp; indicates the time included to call other functions.<\/li>\n\n\n\n<li>percall: Percall shows the total time spent for a single function call. It is obtained by dividing the number of calls by the&nbsp; cumulative time.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Short Program Explaining Use of Different Columns Usage in Python cProfile:<\/strong><\/h3>\n\n\n\n<p>def factorial(n):<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if n == 0:<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return 1.0<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return n * factorial(n-1)<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;def taylor_exp(n):<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return [1.0\/factorial(i) for i in range(n)]<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;def taylor_sin(n):<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;res = []<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for i in range(n):<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if i % 2 == 1:<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;res.append((-1)**((i-1)\/2)\/float(factorial(i)))<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;res.append(0.0)<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return res<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;def benchmark():<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;taylor_exp(500)<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;taylor_sin(500)<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;if __name__ == &#8216;__main__&#8217;:<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;benchmark()<\/p>\n\n\n\n<p><strong>Code: (<\/strong><a href=\"https:\/\/www.rgonzo.us\/shiny\/books\/Python%20High%20Performance.pdf\"><strong>Source<\/strong><\/a><strong>)<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Profiling with Python cProfile: Everything You Need to Know is Right Here!<\/h2>\n\n\n\n<p>Code profiling allows you to quickly&nbsp; find bottlenecks in your code. Profiling helps you find what code takes the longest.&nbsp; A code profiler lets you quickly look at pieces of code to optimize software performance. cProfile\u2019s profiling interface makes development easier.0.<\/p>\n\n\n\n<p>Python cProfile is a set of numbers that shows how long and often program parts are called and run. You can easily format the report as a pstats module. Coding using cProfile is relatively easy. You just need to import the right function and module to call the run function.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Check the simple cProfile example right here:<\/strong><\/h3>\n\n\n\n<p>&gt;&gt;&gt; import hashlib<\/p>\n\n\n\n<p>&gt;&gt;&gt; import cProfile<\/p>\n\n\n\n<p>&gt;&gt;&gt; cProfile.run(&#8220;hashlib.md5(&#8216;abcdefghijkl&#8217;).digest()&#8221;)<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4 function calls in 0.000 CPU second<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;Ordered by: standard name<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;ncalls tottime cumtime percall filename:lineno(function)<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1 0.000 0.000 0.000 0.000 &lt;string&gt;:1(&lt;module&gt;)<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1 0.000 0.000 0.000 0.000 {_hashlib.openssl_md5}<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1 0.000 0.000 0.000 0.000 {method &#8216;digest&#8217; of &#8216;_hashlib.HASH&#8217; objects}<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1 0.000 0.000 0.000 0.000 {method &#8216;disable&#8217; of &#8216;_lsprof.Profiler&#8217; objects}<\/p>\n\n\n\n<p>&lt;\/module&gt;&lt;\/string&gt;<\/p>\n\n\n\n<p><strong>Code: (<\/strong><a href=\"https:\/\/www.w3resource.com\/python-exercises\/python-basic-exercise-51.php\"><strong>Source<\/strong><\/a><strong>)<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Importing cProfile: Learn the Right Way to Use it!<\/h2>\n\n\n\n<p>Users can also use free code profiler tools like <a href=\"https:\/\/stackify.com\/prefix\/\">Stackify Prefix<\/a>. Prefix helps speed up coding and handle unexpected issues like hidden exceptions and many more. Prefix puts the power of APM in the hands of developers. By validating the performance of code as it is written, Prefix users push better code to testing, receive fewer support tickets from production, and have happier dev managers. Prefix provides great support for Python, as well as .NET, Java,&nbsp; PHP, Node JS, and Ruby on Windows and MacOS. <a href=\"https:\/\/stackify.com\/prefix\">Download Prefix for FREE.<\/a><\/p>\n\n\n\n<p>With cProfile, developers&nbsp; can use C extension for long-running programs. C extension is a built-in python module for profiling. It&#8217;s a commonly used <a href=\"https:\/\/stackify.com\/how-to-use-python-profilers-learn-the-basics\/\">Python profiler<\/a> that :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Helpss you know the total run time required by the entire code.<\/li>\n\n\n\n<li>Identifies the time needed and enables users to find which area needs optimization.<\/li>\n\n\n\n<li>Shows what time certain functions are called.<\/li>\n\n\n\n<li>Exports&nbsp; with the help of pstats module.<\/li>\n\n\n\n<li>Uses&nbsp; the snakeviz module to check data.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Code Used for Importing cProfile Package:<\/strong><\/h3>\n\n\n\n<p># import module<\/p>\n\n\n\n<p>import cProfile<\/p>\n\n\n\n<p><strong>Code: (<\/strong><a href=\"https:\/\/stackoverflow.com\/questions\/tagged\/cprofile?sort=unanswered&amp;pageSize=30\"><strong>Source<\/strong><\/a><strong>)<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Basic Usage of cProfile<\/strong><\/h3>\n\n\n\n<p>Most effective way of profiling with cProfile is with run() function. You can pass a string statement to run(). Check below code to know how you can do so:<\/p>\n\n\n\n<p>&gt;&gt;&gt; x = []&gt;&gt;&gt; type(x)builtins.list<\/p>\n\n\n\n<p>&gt;&gt;&gt; x=[1,2,3,4]<\/p>\n\n\n\n<p>&gt;&gt;&gt; x[1,2,3,4,5]<\/p>\n\n\n\n<p># 2-dimensional list (list of lists)<\/p>\n\n\n\n<p>&gt;&gt;&gt; x = [[1,2,3,4,5], [5,6,7,8]]<\/p>\n\n\n\n<p>&gt;&gt;&gt; x[[1, 2, 3, 4], [5, 6, 7, 8,9]]<\/p>\n\n\n\n<p># Jagged list, not rectangular<\/p>\n\n\n\n<p>&gt;&gt;&gt; x = [[1,2,3,4, 5] , [5,6,7]]<\/p>\n\n\n\n<p>&gt;&gt;&gt; x[[1, 2, 3, 4], [5, 6, 7,8]]<\/p>\n\n\n\n<p># Mixed data types<\/p>\n\n\n\n<p>&gt;&gt;&gt; x = [1,1.0,1+0,&#8217;one&#8217;,None,True]<\/p>\n\n\n\n<p>&gt;&gt;&gt; x[1, 1.0, (1+0),&#8217;one&#8217;, None, True]<\/p>\n\n\n\n<p><strong>Code: (<\/strong><a href=\"https:\/\/bashtage.github.io\/kevinsheppard.com\/files\/teaching\/python\/notes\/python_introduction_2020.pdf\"><strong>Source<\/strong><\/a><strong>)<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Profiling Function of cProfile that Helps to Call Other Functions:<\/h2>\n\n\n\n<p>You can even call other functions using profiling. Pass a main () process to cProfile.run () function as a string. Check the below example to have a better understanding.<\/p>\n\n\n\n<p>from array import *<\/p>\n\n\n\n<p># Declare an array of 10 floats<\/p>\n\n\n\n<p>num_array = array(&#8216;f&#8217;, range(0, 10))<\/p>\n\n\n\n<p># Printing the array before deletion of elements<\/p>\n\n\n\n<p>print(&#8220;num_array before deletion: {}&#8221;.format(num_array))<\/p>\n\n\n\n<p># Delete the first element of array<\/p>\n\n\n\n<p>del num_array[0]<\/p>\n\n\n\n<p>print(&#8220;num_array after removing first element: {}&#8221;.format(num_array))<\/p>\n\n\n\n<p># Delete the last element<\/p>\n\n\n\n<p>del num_array[len(num_array)-1]<\/p>\n\n\n\n<p>print(&#8220;num_array after removing the last element: {}&#8221;.format(num_array))<\/p>\n\n\n\n<p># Remove the entire array in one go<\/p>\n\n\n\n<p>del num_array<\/p>\n\n\n\n<p># Printing a deleted array would raise the NameError<\/p>\n\n\n\n<p>print(&#8220;num_array after removing first element: {}&#8221;.format(num_array))<\/p>\n\n\n\n<p><strong>Code: (<\/strong><a href=\"https:\/\/www.techbeamers.com\/python-arrays\/\"><strong>Source<\/strong><\/a><strong>)<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Profile Class of cProfile: How to Use it?<\/h2>\n\n\n\n<p>Do you know what you need when you perform the run() method? Even though the most function of cProfile provides you with quick control over some cases and specific techniques that are usually used.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Performance optimization is a basic need for software development. When it comes to optimizing app performance,&nbsp; tracking frequency, maintaining production, or perpetuation method calls, profilers play a vital role. Learn why Python cProfile is a recommended profiling interface and how it enhances your software performance. Python cProfile:&nbsp;Optimize Software Development Requirements Statista report shows that Java [&hellip;]<\/p>\n","protected":false},"author":135,"featured_media":36768,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7],"tags":[52],"class_list":["post-33166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-developers","tag-developer-tips"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.6 (Yoast SEO v25.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Why Python cProfile is the Recommended Profiling Interface - Stackify<\/title>\n<meta name=\"description\" content=\"Performance optimization is essential for software development. 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