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You're criticizing Java for being slow, and then presenting Ruby as an alternative. You do realise that Java is up to 100 times faster than Ruby: http://shootout.alioth.debian.org/u32/benchmark.php?test=all.... And on multicore systems Java up to 300x faster than Ruby: http://shootout.alioth.debian.org/u64q/benchmark.php?test=al...

...alternatively combine the performance of Java with a highly expressive language e.g. Scala

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yes, but if you noticed I'm comparing Java to C in terms of program language speed. I'm comparing Java to Ruby in development speed NOT language speed, I thought this was obvious... sorry, If I wasn't clear enough above.

You were clear, but if you're going to compare languages you can't cherry pick which features to compare. You compared Java to C performance and then Java to Ruby in terms of expressiveness. Since Ruby does not have the performance of C and C does not have the expressiveness of Ruby it's not really a fair comparison to Java.

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