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1  Game Development / Networking & Multiplayer / Re: UDP Vs TCP/IP on: 2004-04-18 09:19:21
I haven't seen this mentioned in the thread but it seems relevant. The Reliable Data Protocol (RFC's 908/1151) is built on UDP and can deliver reliable, out of order data packets without bringing in congestion control and other features of TCP. It looks like there's a pretty complete Java implementation of it developed as part of a larger project by USC.

A link to an explanatory article on their use of RDP and the implementation they provide:
http://www.isi.edu/div7/arp/ACC/docs/html/rdp/

The project homepage:
http://www.isi.edu/active-signal/ARP/index.html
2  Game Development / Performance Tuning / Re: So now we're on a microbenchmarking spree on: 2004-01-17 21:17:20
Here's a bug from BugParade I found on a discussion at TheServerSide.com about the same benchmark study: http://developer.java.sun.com/developer/bugParade/bugs/4857011.html
I don't know if this particular bug was posted in this forum before. The evaluation makes the reasoning behind Java 1.4 trig functions' implementation pretty clear. A combination of using narrow ranges and table lookups seems to be the way.
3  Game Development / Performance Tuning / Re: for Jeff.... microbenchmarking. on: 2004-01-09 16:42:03
Looking at the previous thread "amazing java.lang.math performance" at http://www.JavaGaming.org/cgi-bin/JGNetForums/YaBB.cgi?board=Tuning;action=display;num=1063822912, I see that even with table lookups and fast versions of the functions there was a 3x improvement in performance. That doesn't explain the more than 10x difference between Microsoft's implementation of trig functions and Java 1.4.2, does it?
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