Writing kernel modules in Haskell [LWN.net]

Writing kernel modules in Haskell

Posted Sep 15, 2009 1:01 UTC (Tue) by mikov (subscriber, #33179)
In reply to: Writing kernel modules in Haskell by nye
Parent article: Writing kernel modules in Haskell

Offtopic:

As someone who has the misfortune of running Java applications on 200MHz x86 CPUs, I feel that it is my duty to announce in public: The "Java slowness" is not a myth! It is real :-)

The overabundance of computing power has made everybody lose their objectivity. Nowadays we even have people claiming that JavaScript (!!!) is as fast as C. Similarly, a couple of years ago we had (the same?) people claiming the same for Java. In reality, I am thinking that Java is probably about 10x slower than C, and JavaScript 10x slower than Java :-)

People seem to believe that JITs can offer infinite improvements. In reality I suspect that we will never see a 2x improvement for JavaScript JITs compared to now without changing the language itself.

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Java speed arguments

Posted Sep 17, 2009 22:29 UTC (Thu) by smoogen (subscriber, #97) [Link]

It all depends on how the application is written. Many C applications can be quite boggy slow when you make them do the same things that most java bogs down on: graphics, UTF-8, etc.

Look at how slow grep and some other Linux applications got when they started dealing with UTF-8 environments versus good old 'C' environment. Or how slow some applications could be when run in a 'newer' graphical terminal versus say a console or older xterm.

The biggest problem that people run into is that few development groups work on the hardware many users have (though I don't think I have any 200Mhz working systems here anymore myself).