UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36

Steps to reproduce the problem:
My Chrome is constantly slow, and I'd like to know what it's exactly doing in real-time.

I've checked on OS X by:

  sudo dtrace -l | grep -i chrom

and I don't see any static probes.

So the aim of this issue is to investigate whether it's possible to implement static probes for certain actions such as request being made, extension is being invoked, something is rendered, etc.

What is the expected behavior?
I was expecting some probes, so I can debug the requests and performance for specific actions, similar as for PHP or MySQL (e.g. http://php.net/manual/en/features.dtrace.dtrace.php, https://dev.mysql.com/tech-resources/articles/getting_started_dtrace_saha.html).

What went wrong?
Chrome is freezing my OS X all the time by making mouse pointer to spin. Tested on different profiles with different extensions. Probably because of too many tabs (which I need on daily basis).

Did this work before? N/A 

Chrome version: 49.0.2623.87  Channel: n/a
OS Version: OS X 10.11.2
Flash Version: Shockwave Flash 21.0 r0