>>>>> "Hubert" == Hubert Chan <hubert@xxxxxxxxx> writes: [...] Hubert> Running some informal tests, generating a 25-bit stamp in Hubert> parallel *can* take about the same time as generating a 22-bit Hubert> stamp with just one process (as would be expected), but Hubert> sometimes generating the 22-bit stamp is much faster. But my Hubert> number of runs is far too small so far to say anything Hubert> meaningful. I suspect that the variance in generation time Hubert> should decrease too. (It's been a while since I took stats.) OK, here's the results after 30 runs of each: 22-bit stamp, single process: avg.: 31.433s (wall clock time) std. dev.: 38.349 max.: 166.706s min.: 0.314s (huge difference between max and min times) 25-bit stamp, 8 parallel processes: avg.: 31.264s std. dev.: 20.161 max.: 75.205s min.: 9.029s So on a cluster machine, it seems to perform as expected. -- Hubert Chan <hubert@xxxxxxxxx> - http://www.uhoreg.ca/ PGP/GnuPG key: 1024D/124B61FA Fingerprint: 96C5 012F 5F74 A5F7 1FF7 5291 AF29 C719 124B 61FA Key available at wwwkeys.pgp.net. Encrypted e-mail preferred.