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I believe this also includes the bitmap marking GC changes which will make the GC copy-on-write friendly. This is pretty important for a lot of folks running Ruby web servers.

See, for example:

http://patshaughnessy.net/2012/3/23/why-you-should-be-excite...

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This is probably the most exciting part to me: Having copy-on-write without having to run REE.

You can have this right now. We back ported the GC. Shopify in running on this ruby version in production.

https://gist.github.com/1688857

Thats great! Hope this will work on 1.9.3p286 as well?

Yes, the Falcon patches work like a charm against p286.

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