Using kcachegrind to debug javascript scripts

If you notice that your scripts take a lot of time to handle specific requests(messages) it might be time for a little profiling. You can use kchachegrind for this.

Configuration

javascript.conf

[general]
allow_trace=yes

In code

At the start of the main js file add:

#pragma trace "cachegrind.out.filename"

Make sure you don't add this in any of the included files

Run test in yate

Start Yate, make the test you wanted and then stop Yate. After stopping you will find a file called "cachegrind.out.filename" in the directory where yate was started from.

Running cachegrind

The command to use kcachegrind:

kcachegrind cachegrind.out.filename

Note! kcachegrind is a GUI so if you are using ssh to to connect to that server, disconnect and reconnect with "ssh -X"