For these reasons, I often prefer the Marsaglia's KISS 2015-10-22 17:57 GMT+02:00 Henrik Johansen <henrik.s.johan...@veloxit.no>:
> > > On 22 Oct 2015, at 2:49 , Tobias Pape <das.li...@gmx.de> wrote: > > > > > > > > On 22.10.2015, at 14:37, David T. Lewis <le...@mail.msen.com> wrote: > > > >> On Thu, Oct 22, 2015 at 06:28:09AM +0000, comm...@source.squeak.org > wrote: > >>> Tobias Pape uploaded a new version of Network to project The Trunk: > >>> http://source.squeak.org/trunk/Network-topa.166.mcz > >>> > >>> ==================== Summary ==================== > >>> > >>> Name: Network-topa.166 > >>> Author: topa > >>> Time: 21 October 2015, 8:26:14.656 pm > >>> UUID: d6d9910f-fa67-4c69-9a89-030c81233e90 > >>> Ancestors: Network-topa.165 > >>> > >>> UUIDGenerator > >>> - Use new Random>>#nextBytes:into:startingAt: (needs Kernel-ul.960) > for even more speed > >>> - Fix UUIDGenerator class>>#initialize to correctly register at startup > >>> - Do not reset default on startup but rather reseed TheRandom > >>> > >>> Timings improved: '1,190,000 per second. 842 nanoseconds per run.' > (0.25 times slower than primitive version) > >>> > >> > >> This is outstanding. The UUID plugin has long been a source of problems > in > >> the VM, partly due to issues in various Linux distributions. > >> > >> http://bugs.squeak.org/view.php?id=7358 > >> > >> Making the plugin unnecessary is a big improvement. > > > > Thats what I thought. > > Probably we want to present this (Mersenne PRNG + new UUID gen) to > > the Pharo core developers (cc) so that we can just remove the UUID plugin > > from the VMs (cc vm-dev)? > > > > Best regards > > -Tobias > > In the release version of Squeak 5.0, the Mersenne Twister is initialized > using a single seed restricted to 32bit. > Has this been changed since to use a wider ranged value? > Otherwise, you run into problems with potential collisions from separate > image starts rather too fast for UUID uses... (IMHO) > > Cheers, > Henry >
