What is xdebug profiling?

Introduction # Xdebug’s Profiler is a powerful tool that gives you the ability to analyse your PHP code and determine bottlenecks or generally see which parts of your code are slow and could use a speed boost. The profiler in Xdebug outputs profiling information in the form of a Cachegrind compatible file.

How do you use valgrind for profiling?

To profile, you run your program under Valgrind and explicitly request the callgrind tool (if unspecified, the tool defaults to memcheck). Valgrind has written the information about the above 7 million collected events to an output file named callgrind.

What is incl in KCacheGrind?

1.1 What is the difference between ‘Incl. These are cost attributes for functions regarding some event type. As functions can call each other, it makes sense to distinguish the cost of the function itself (‘Self Cost’) and the cost including all called functions (‘Inclusive Cost’).

How do I run KCacheGrind?

You can launch KCacheGrind using command line or in the program menu if your system installed it here. Then, you have to open your profile file. The first view present a list of all the profiled functions. You can see the inclusive and the self cost of each function and the location of each one.

How do I use xdebug profiler?

Enable the Xdebug profiler

Open the active php.ini file in the editor: In the Settings/Preferences dialog Ctrl+Alt+S , click PHP.
Do one of the following: To permanently enable the profiler, set the xdebug.profiler_enable (for Xdebug 2) or xdebug.mode (for Xdebug 3) directive:

How do I run xdebug?

Listen for xDebug Method

Open a .
Add some code and add some breakpoints.
Change the Debug select option to ‘Listen for xDebug’.
Press F5 to start the debugger.
Click the new XDebug Helper extension and click the Debug option.
You will notice that helper icon has turned turn green (See image below)

How slow is Callgrind?

Specify if you want Callgrind to start simulation and profiling from the beginning of the program. When set to no , Callgrind will not be able to collect any information, including calls, but it will have at most a slowdown of around 4, which is the minimum Valgrind overhead.

What is Callgrind_annotate?

callgrind_annotate stops printing functions when the sum of the cost percentage of the printed functions for all the events is bigger or equal to the given event threshold percentages. When one or more thresholds are given via this option, the value of –threshold is ignored.

What is xdebug cloud?

Xdebug Cloud is hosted service that allows for Xdebug debugging sessions to be proxied through an online service bypassing networking complications. This bypasses complex networking set-ups, related to Vagrant, Docker, NAT networks, and more. Xdebug Cloud needs support in your IDE.

How does the kcachegrind tool work with callgrind?

Callgrind produces a large amount of data about the program’s execution. It is most easily understood using the kcachegrind GUI tool. This reads the information produced by callgrind and creates a list of function calls along with information on timings of each of the calls during the profiled run.