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Comment by cies | Hacker News Reader

The article mentions:

> Ruby 2.1 has many improvements including speedup without severe incompatibilities. You can use this on Rails and some applications, and get more comfortable experience.

Since the changelog is very large I'm still interested in what speedups are part of this release. Anyone?

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There are huge performance improvements in Ruby 2.1.0 as compared to Ruby 2.0.0, I have seen as much as a 2x improvement in real world settings, and they have to with Ruby now having a generational garbage collector:

http://www.infoq.com/news/2013/12/ruby21

I don't think this current patch release itself contains much performance fixes.

Ok.. I misread that, and assumed the 2.1.1 came with further perf improvements.

Ruby v2.1 have a improved GC which helps a LOT with performace. You can know about Performance changes in these posts:

    http://tmm1.net/ruby21-rgengc/
    http://tmm1.net/ruby21-oobgc/

And 2.1.1 is point release, so only contains bug fixes. It doesn't contain new features.

see my slides: https://speakerdeck.com/samsaffron/why-ruby-2-dot-1-excites-...

only perf related feature is: RUBY_GC_OLDOBJECT_LIMIT_FACTOR ... you can set it to 1.5 to heavily reduce RSS usage of 2.1

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