The first column is the time percent the second column is the time (in ms) the third column is the count and the fourth column is the name of the method. Both XDebug (as a profiler) and XHProf are profilers they are able to answer a lot of questions you might have about the performance of your code, and they can help you understand why your code is slow. Whether text is shown after the skin or in an HTML comment. visible Only applies to 'ProfilerOutputText' format. Required to specify where the dump files will be stored. outputDir Only applies to 'ProfilerOutputDump' format. Xdebug Xdebug is easy to install and operate, and it does not require code changes. Dump produces a dump of the profiling info for use with xhprof GUI (xhprofgui role on Vagrant setup). PHP has two significant profilers that belong to the standard type: Xdebug and Xhprof. UDP is a format send to a udpprofile daemon. Prefix code profiling and tracing helps you optimize performance at the code level, so you release better. A good example of when to utilise a code profiler is to figure out what is utilising 20 of your codes overall CPU consumption and then figure out how to enhance it. Text outputs the information in either HTML comments or after the skin. With Summary Dashboards, consolidated logs, distributed tracing, smart suggestions and the ability to jump from logs to traces (and back), Prefix puts powerful APM capabilities in the hands of developers. Profilers are excellent for locating the codes hot route. output One or more of 'ProfilerOutputText', 'ProfilerOutputDump', 'ProfilerOutputStats'. Make sure PHP zlib extension is enabled (recommended). Ensure Xdebug PHP extension is installed as well. Even if you are using Tideways, still specify the ProfilerXhprof class. PHP code profiling allows you to inspect how much time and how many calls were made to every single function in the code. Xdebugs 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. Old values such as ProfilerStandard, ProfilerUDP, ProfilerDB, etc do not work. ProfilerXhprof is new in MediaWiki 1.25 and provides an Xhprof-backed profiler that captures profiling data for all functions as well as sub-functional units.
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