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Virtual Machine

Lukas Stadler is my hero, at last JVM summit, he just explain how coroutine and friends can be implemented in the VM and guess what, it now works (currently only with C1). Let's try to implement something with it. Generator I have always wanted to have generator in Java. After all, Python have this feature, Ruby and C#(*) too. A generator is a way to define an iterator but instead of...
on Nov 19, 2009


Today, a tantalizing announcement by Mark Reinhold about closures in Java 7 has made its way through the twittersphere. On the same day, Neal Gafter updated his closure proposal (known as the BGGA proposal, named after the initials of Bracha, Gafter, Gosling, and von der Ahé, and not at all related to the B. G. G. A. organization). Presumably the timing is not a coincidence. The proposal...
on Nov 18, 2009
Yesterday, a Hudson committer Alan Harder discovered an EOFException in Hudson, which only happens on 64bit JVM on Solaris. This was happening in the part of Hudson (or more precisely, in a separate library called Akuma) where we look at the memory space of the process to figure out the command line arguments of the current process (the /proc/ID/as file — an equivalent of /proc/ID/mem in...
on Sep 17, 2009

Open Source

Entry posted to my new blog. OREDEV
on Nov 9, 2009


Let me introduce a new language named pseudo (Why this name ? Why another language ? Why God ? all these questions will be answered in a later blog). One great feature of this language is that it allows gradual typing, i.e. you can assign a type to a parameter, a local variable, etc. or not. If a variable as no type, the compiler consider it as any. You can assign any value...
on Nov 1, 2009


During the JVM Summit, I was doing some tests for my presentation with the latest jdk7 binaries when I've seen some *BIG* performance improvement between jdk7 b71 and jdk7 b72. A quick look to the summary of changes, hum, Escape Analysis is now enabled by default. On my tests, I got a 3x improvement, Wow ! With a quick micro-benchmark, it's even better, as always :)  ...
on Oct 6, 2009