the guy who posted this answer is a .net programmer
his point was objection to lack of security in windows.
I don't want to waste my time arguing such a matters with this kind of people, he is supposed to learn this stuff at his university operating system courses, if he has not I can't do any thing for him.
But about your comment
lots of <<old>> jvm performance comparison show faster results for windows than linux like the ones discussed in thread:
http://lkml.org/lkml/2006/4/13/202
I think the first reasons is Sun sell Solaris not Linux, so they won't optimize their Linux JVM that much that it can beat their Solaris JVM, so as a result it may become slower than windows JVM too.
the main technical reason refers to reason described in the following quote from Sun web at the following URL:
"By comparison, on Solaris the java threads are mapped onto user threads, which in turn are run on Lightweight processes (LWP). On Windows the threads are created inside the process itself. For this reason, creating a large number of Java threads on Solaris and Windows today is faster than on Linux. This means you might need to adjust programs that rely on platform-specific timing to take a little longer on startup when they run on Linux."
java.sun.com/.../
the problem of some JVM's performance with some Linux distros was that most linux jvms where mapping java threads into linux system process. of course system process takes much more time switching than threads or fibers.
the other technical reasons is windows (DOS) file system, windows file system becomes fragmented after a while and the file system may become corrupted you may loose your files if computer is shutdown due to power failor.
of course an operating system like BSD (and some Linux distros which come with similar file systems), which their file system avoid fragmentation and optimizes file storage and works transactional have lots of performance overhead.
some of Linux JVM performance problems can be solved with OS and JVM configurations.
now the modern +1.5 versions of JVM's from sun run as fast on linux as on windows as shown in the below link from SUN:
java.sun.com/.../5.0_performance.html
yes some Linuxes are running Java faster than windows,
due to its open source nature Linux kernel can be tuned and trimmed of unnecessary threads to become more optimized to run Java. Redhat, Oracle and some other vendors are already providing such a distribution of Linux.
about java on SUSE as long as I know till version 8 of SLES 8 it had some big problems with java at kernel level (refer to below link from IBM)
www-128.ibm.com/.../...tualMachinePerformance.html
may be this is solved at version 9 or 10
if you are sure that Java runs on Suse as fast as windows then it should run faster on other Linux distros!
and at the end for those who like laughing at windows, you may take a look at this link:
www.webperformanceinc.com/.../index.html
specially look at the chart below "Errors per second" for windows.