Uninstalling Flash wouldn't be noticed, Chrome has its own Flash runtime so doesn't rely on it. I run Flashblock in chrome , it was one of the first extensions I installed, and Chrome is still a power and memory hog, so doubt it'll help. I read it's down to the code base not using native performance enhancements, so it grabs memory etc to do its stuff.
So run on a Chromebook and it's great as it's built for it, (even my 2gb samsung does well). Worst machine was the developer work laptop I had, quad core i7, 16gb, 1tb ssd, running chrome would require me to bring up task manager to kill other tasks that had become zombie as chrome was using 12gb of memory to display gmail in 1 tab.