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serenity/Base/usr/share/man/man1/Profiler.md
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## Name
![Icon](/res/icons/16x16/app-profiler.png) Profiler - Serenity process profiler
[Open](file:///bin/Profiler)
## Synopsis
```**sh
$ Profiler [--pid PID] [perfcore-file]
```
## Description
Profiler facilitates process performance profiling and provides a GUI offering
visual graph and tree representations to easily navigate generated profiling
information.
If no arguments are provided, a window containing a list of running processes
is presented, allowing a process to be selected for profiling.
Profiling information is written to `perfcore.<pid>` in the working directory
and opened immediately for browsing following termination of profiling.
Profiler can also load performance information from previously created
`perfcore` files.
## Options
* `-p PID`, `--pid PID`: PID to profile
## Arguments
* `perfcore-file`: Path of perfcore file to load
## Examples
Profile running Shell process:
```sh
$ Profiler -p $(pidof Shell)
```
Open a previously created perfcore file for browsing:
```sh
$ Profiler perfcore.123
```
## See also
* [`perfcore`(5)](help://man/5/perfcore)