Thank you for your reply, it was most helpful. With cacao I am now getting much higher speeds. The 2,3M binary data now loads in about 4-5 seconds.
Regards, Vegar On Thu, Oct 16, 2008 at 12:57 PM, Riku Voipio <[EMAIL PROTECTED]> wrote: > On Wed, Oct 15, 2008 at 11:55:08PM +0200, Vegar Neshaug wrote: >> The QNAP TS-109 has a Marvell 5182 500MHz processor. Specifications >> can be found here: http://www.qnap.com/pro_detail_hardware.asp?p_id=91 > >> I have installed lenny versions of openjdk 6 headless and mysql. >> Tomcat 6 was downloaded from the tomcat webpages and installed >> locally. > >> I have a small web application which outputs image files stored as >> blobs in the mysql database. >> >> The output of the binary data is done in a loop similar to the >> following, where "in" is the mysql binary stream and "out" is the >> servlet outputstream. >> byte[] rbuf = new byte[1024]; >> while ((nbytes = in.read(rbuf)) != -1) { >> out.write(rbuf, 0, nbytes); >> } >> >> >> On the TS-109 this gives me speeds around 25 KB/s with "top" showing >> the java process working at around 90-100 %. >> For a 2,3M image this takes around 90 seconds. >> On a 2GHz pentium 4, the same download using the same software and >> binary data output implementation uses much less, maybe around 1 >> second. > >> What might be the reason for this difference in performance? >> Is the java implementation on debian-arm particularly slow? >> Is it possible to get better performance? > > You might want to try cacao-oj6-jre-headless, which is openjdk > using cacao JIT. plain openjdk on arm is intepreted, and thus > quite slow. > > -- > "rm -rf" only sounds scary if you don't have backups > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
