Enable profiling

Enable a built-in profiler.

You can use a built-in profiler with Commerce to perform tasks such as analyzing performance. The nature of profiling depends on the analytical tools that you use. We support multiple formats, including HTML. When you enable the profiler, a var/profiler.flag file generates indicating the profiler is enabled and configurations. When disabled, this file is deleted.

Display dependency graphs on a Commerce page.

A dependency graph is a list of object dependencies and all of their dependencies, and all the dependencies for those dependencies, and so on.

You should be particularly interested in the list of unused dependencies, which are objects that were created because they were requested in some constructor, but were never used (that is, none of their methods were called). As a result, processor time and memory spent to create these dependencies are wasted.

1 to enable a specific profiler’s output.

You can use one of the following values to enable a specific profiler:

• csvfile which uses Magento\Framework\Profiler\Driver\Standard\Output\Csvfile
• Any other value (except 2), including an empty value, which uses Magento\Framework\Profiler\Driver\Standard\Output\Html

2 to enable dependency graphs.

Dependency graphs typically display at the bottom of a page. The following figure shows portion of the output: