To speed up the processing time, I have found that the parameters must be accurately entered (either through successful reading of the configuration file through Snaphu - which did not work for me [see my reply to this problem here: Snaphu configuration error]; or by manually entering the parameters in the command-line).
The processing time of a single processed interferogram recorded by Snaphu in a nominated log was 1:17:41 (1 hour, 17 minute and 41 seconds).
Nait