Python/Profiling - Revision history

Unknown user: /* cProfile */

2020-09-20T23:43:08Z

cProfile

← Older revision		Revision as of 23:43, 20 September 2020
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	* As stated by rkern [https://github.com/rkern/line_profiler], "The current profiling tools supported in Python 2.7 and later only time function calls. This is a good first step for locating hotspots in one's program and is frequently all one needs to do to optimize the program. However, sometimes the cause of the hotspot is actually a single line in the function, and that line may not be obvious from just reading the source code."		* As stated by rkern [https://github.com/rkern/line_profiler], "The current profiling tools supported in Python 2.7 and later only time function calls. This is a good first step for locating hotspots in one's program and is frequently all one needs to do to optimize the program. However, sometimes the cause of the hotspot is actually a single line in the function, and that line may not be obvious from just reading the source code."

	Link: https://docs.python.org/2/library/profile.html		Link: https://docs.python.org/3/library/profile.html

	===Line by Line===		===Line by Line===

2019-03-12T16:01:33Z

Flags

2019-03-12T15:59:45Z

2017-09-28T01:24:15Z

Using line profiler

← Older revision		Revision as of 01:24, 28 September 2017
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	1 0.000 0.000 0.000 0.000 {method 'disable' of '_lsprof.Profiler' objects}		1 0.000 0.000 0.000 0.000 {method 'disable' of '_lsprof.Profiler' objects}
	</pre>		</pre>

	~~=Using line profiler=~~

2017-09-28T01:24:08Z

line by line

2017-09-28T01:23:50Z

cProfile

← Older revision		Revision as of 01:23, 28 September 2017
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	Gprof2dot link: https://github.com/jrfonseca/gprof2dot		Gprof2dot link: https://github.com/jrfonseca/gprof2dot

	=cProfile=		=Using cProfile=

	==Basic usage==		==Basic usage==

2017-09-28T01:23:20Z

Line by Line

← Older revision		Revision as of 01:23, 28 September 2017
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	</pre>		</pre>

	To profile:		To profile, decorate a function with @profile:

	<pre>		<pre>
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	</pre>		</pre>

	~~This results~~ in a file called <code>~~script_to_profile~~.py.lprof</code>, which you can read with the line_prof module:		When you run the program, this will result in a file called <code>name_of_your_script_here.py.lprof</code>, which you can read with the line_prof module:

	<pre>		<pre>
	$ python -m line_profiler ~~script_to_profile~~.py.lprof		$ python -m line_profiler name_of_your_script_here.py.lprof
	</pre>		</pre>

2017-09-28T01:22:24Z

Built Into Python

← Older revision		Revision as of 01:22, 28 September 2017
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	==List of Python Profiling Tools==		==List of Python Profiling Tools==

	===~~Built Into Python~~===		===cProfile===

	~~Profiling tools provided by Python:~~		cProfile is a C extension, the recommended method of profiling python programs, and is based on lsprof. It is built into Python.
	* cProfile is a C extension, the recommended method of profiling python programs, and is based on lsprof
	* <s>profile is ~~a module that adds significant overhead; reports time spent in calls to~~ built~~-in functions and methods</s>~~
	* <s>hotshot - not developed/supported anymore</s>

	Benefits:		Benefits:

2017-09-28T01:21:52Z

Graphviz Dot

← Older revision		Revision as of 01:21, 28 September 2017
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	Link to github: https://github.com/rkern/line_profiler		Link to github: https://github.com/rkern/line_profiler

	===Graphviz Dot===		===Gprof to Graphviz Dot===

	Gprof2dot:		Gprof2dot:
	* Reads all sorts of input formats~~, outputs~~ to graphviz dot		* Reads all sorts of input formats
			* Outputs to graphviz dot

	Gprof2dot link: https://github.com/jrfonseca/gprof2dot		Gprof2dot link: https://github.com/jrfonseca/gprof2dot



	=cProfile=		=cProfile=

2017-09-28T01:20:58Z

Line by Line

← Older revision		Revision as of 01:20, 28 September 2017
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	To profile:		To profile:

	<~~source lang="python"~~>		<pre>
	@profile		@profile
	def slow_function(a, b, c):		def slow_function(a, b, c):
	...		...
	</~~source~~>		</pre>

	This results in a file called <code>script_to_profile.py.lprof</code>, which you can read with the line_prof module:		This results in a file called <code>script_to_profile.py.lprof</code>, which you can read with the line_prof module: