Joe, > On Jul 3, 2015, at 10:43 AM, Joe Taylor <j...@princeton.edu> wrote: > > Hi Steve, > >> Hmmm. That’s interesting and surprising. I tested it separately on 40m and >> 20m files and saw 35% and 17% reduction in execution time, respectively. So >> when I got 25% reduction for the large batch containing files from all >> bands, I was convinced that I had a robust result. >> >> I wonder if this uncovers a difference between compiler optimizations on the >> Mac and Windows. > > Not likely, I think. Maybe it's a difference between our sets of > example files? Or maybe I've made a mistake with my test.
I’m collecting a new batch of files. In the meantime, I wonder if you happened to save the wspr_timer files. It should be instructive to compare them. I have a hunch that the fact that I am running on a laptop with a solid-state disk drive can explain part of the difference. If you are running with a spinning disk, maybe the readwavfile times are vastly different and are swamping the other improvements? I’ll include my times, below. Note that wsprd_exp spends 1/4 as much time in sync_and_demod(0)! I deliberately used some of this savings to increase the time spent in the decoder (by removing quickmode on the second pass). Note that these results are for 214 20m files, so the average time per file is almost exactly 1 second for wsprd_exp. wsprd: Code segment Seconds Frac ----------------------------------- readwavfile 36.44 0.14 Coarse DT f0 f1 24.95 0.09 sync_and_demod(0) 74.42 0.28 sync_and_demod(1) 30.10 0.11 sync_and_demod(2) 9.39 0.04 Fano decoder 66.38 0.25 ----------------------------------- Total 267.17 1.00 wsprd_exp: Code segment Seconds Frac ----------------------------------- readwavfile 34.42 0.16 Coarse DT f0 f1 24.16 0.11 sync_and_demod(0) 18.67 0.09 sync_and_demod(1) 18.78 0.09 sync_and_demod(2) 8.98 0.04 Fano decoder 83.69 0.39 ----------------------------------- Total 212.35 1.00 Steve k9an > > -- Joe > > ------------------------------------------------------------------------------ > Don't Limit Your Business. Reach for the Cloud. > GigeNET's Cloud Solutions provide you with the tools and support that > you need to offload your IT needs and focus on growing your business. > Configured For All Businesses. Start Your Cloud Today. > https://www.gigenetcloud.com/ > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
