Google Chrome by default runs a new process for each tab that is opened. I am running Ubuntu 15.4 with Chrome 43.0.2357.134 (64-bit). I currently have a load of tabs opened, and there are 57 processes.
$ ps aux | grep chrome | wc -l 57
There are several groups of tabs with different pages on the same sites, one of them being the Stack Exchange network. There are also G+ and Google Play Music.
According to chrome://memory-redirect/ those later two take a lot of memory, Google Play Music holds something like 500MB without even playing.
In total, my Chrome currently eats about 4.3GB of my 8GB of RAM.
Now I am wondering about garbage collection. Is it better to close and open fresh tabs when I want to abandon one site and go somewhere else, or should I rather reuse a tab (and thereby process) by just typing in a different URL?
Which one is more memory-effective?