Automatically use non-exception NIOs for improved performance #210
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Here's a fun one. Apparently, in 2.1.x (and as such, JRuby 9k), Ruby added an undocumented arg to the NIO methods that allows you to use them without exceptions and instead symbol returns of the results. This is only available for write/read and not connect.
Quick performance test of
read_nonblock
with and without exceptions. On MRI, without exceptions is 50% faster, on JRuby it's around 85% faster. This is about inline with what we expect, exceptions in Java/JRuby are much more costly than Ruby, which are already costly.The problem like everything, is testing it is a bitch :(
cc @tarcieri @nerdrew