I use Ruby 2.1.0 locally, in particular I use this Ruby 2.1.0:
This is the only Ruby 2.1.0 I would recommend at the moment. The released version has bugs and random segfaults. In fact I stopped travis (our automatic test tool) from running 2.1.0 cause of random segfaults.
Added on that, 2.1.0 as released has a performance regression for “median” request time over 2.0.0 even though avg and high percentiles are noticeably better.
The Github release Aman put together solves these issues thanks to a few patches by @funny_falcon (pool allocator and global method cache replacement)
At this point in time I can only bless the Github release of 2.1.0 which I may be deploying here at some point in the next month or so (something that is fairly simple with our Docker setup)
So please, hold off on 2.1.0 for now, at least until 2.1.1 is released. At that point we can revisit this.