This is the mail archive of the java@gcc.gnu.org mailing list for the Java project.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
Other format: | [Raw text] |
Hi all, Trying to make GCJ-compiled native RMI to run faster than Java RMI for the last couple of days, but the result is rather discouraging. Would somebody help me out here? My understanding of GCJ-compiled native RMI is that it should run faster than Java RMI. Having said that, I did a test to see the speed of pure RMI calls. By pure, I mean client calls a empty remote method. If I measure the time in between, this should give me the RMI call time, right? Here is a set of results I got (I have also attached my source code and shell script with this email): Numofcalls Java RMI(ms) Native RMI(ms) 300.0 142 172 400.0 235 77 500.0 338 112 1000.0 661 189 2000.0 1111 530 3000.0 1592 908 4000.0 1782 1216 5000.0 1776 1508 10000.0 3083 2933 15000.0 4268 4404 20000.0 5309 5874 25000.0 6603 7386 30000.0 7311 8775 35000.0 9277 10343 40000.0 10638 11751 45000.0 11575 13490 50000.0 13362 14652 55000.0 14692 16106 100000.0 26454 29374 Oddly enough, when the number of calls are small, the native rmi is faster than java rmi, but when the number grows bigger, it actually becomes slower. Any ideas why? I know GCJ version of RMI has not been a focus of the development, would this be the reason? Or is it something to do with my code? In my implementation, O3 is used for the compile-time optimization (see my shell script), and there is no thread or huge amount of objects in the code. ( the time is measured using Sun hotspot 1.5 and GCJ 4.2) Thank you very much Rui
Attachment:
nativermi.rar
Description: nativermi.rar
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |