I tried using the java implementation of BigInteger from the current GCJ CVS. It seems to be even worse than the Sun implementation. If anyone could find a GPL'd, fast, java BigInteger implementation, it would be VERY useful right now.
On Sat, Mar 15, 2003 at 03:07:27AM +0000, Matthew Toseland wrote: > It looks like the dominating factor in the crypto in authorizeTime is > BigInteger.modPow() (a JVM-provided method, which really ought to be > fast...). I'm seeing an average time for modPow() of 1412ms (it seems to > be increasing...). With Sun 1.4. > > Now, with Kaffe, which uses libgmp, averages are closer to 59ms-75ms. > > I will run it on Kaffe overnight to see what happens. > > Possibilities: > > A) Fix remaining Kaffe problems (kaffe has monolithic GC, causing > longish delays from time to time which lock the whole VM, but there is a > kaffe derivative that uses Boehm incremental GC which could be merged; > kaffe seems to get longer lock times suggesting maybe its locking is very > heavy...), bundle Kaffe with Freenet (even on the Win32 version - this > should be possible, I believe there is a port). Grumble if running a Sun > JVM, but still run. > > B) Call out to an external, platform specific helper app if available > (grumble loudly if it isn't there). With times of a second or more, this > is probably still faster than using Sun's slow code. > > C) Any other suggestions? > > We really should do something about this is 0.5.2 - shaving 900ms off > average authorizeTime's/connectingTime's is not something to be ignored. > > BTW, the theory: Kaffe uses libgmp, which is very very fast. Sun uses > some apparently badly written in-house BigInteger code. > -- > Matthew Toseland > toad at amphibian.dyndns.org/amphibian at users.sourceforge.net > Full time freenet hacker. > http://freenetproject.org/ > Freenet Distribution Node (temporary) at > http://80-192-4-36.cable.ubr09.na.blueyonder.co.uk:8889/J3Q~LkZ7ezk/ > ICTHUS. -- Matthew Toseland toad at amphibian.dyndns.org/amphibian at users.sourceforge.net Full time freenet hacker. http://freenetproject.org/ Freenet Distribution Node (temporary) at http://80-192-4-36.cable.ubr09.na.blueyonder.co.uk:8889/Nk9EuxNCnXE/ ICTHUS. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: not available URL: <https://emu.freenetproject.org/pipermail/devl/attachments/20030315/5f91fe01/attachment.pgp>
