Mac Google Chrome Not Responding; how to investigate and fix?
My friend, ask yourself how deep you desire to know and how far you are willing to go.  If you desire merely a working Chrome, reinstall it and hope that all will go better.  

If you want more than that, then let us explore what tracing and profiling can tell us.  You will need Xcode and need the command-line tools installed.  If you have chrome still running, then pull up a Terminal, and let’s profile chrome for a minute when it starts beach-ballin’. 

sudo sample $( pgrep Chrome ) 60 -f ~/Desktop/chrome.profile.txt


You can also use Instruments for the same:

sudo instruments -l 60000 -t Time\ Profiler -p $( pgrep Chrome )


You likely will spot something in there that takes up most of the time.  Time now for trace.  When you are ready, straight bust a dtruss on Chrome, to see the low level:

sudo dtruss -a -f -n Chrome 2&gt; ~/Desktop/Chrome.trace.txt


Let it run for a minute.  Then stop with CONTROL-C, as I recall, off the top of my head.  Then examine that trace file!

Enjoy, and Good Yule,

F.