On 8/3/11 11:09 AM, Ian Stokes-Rees wrote: > On 8/3/11 12:50 PM, Christopher Barker wrote: >> As a reference, reading that much data in from a raw file into a numpy >> array takes 2.57 on my machine (a rather old Mac, but disks haven't >> gotten much faster). > > 2.57 seconds? or minutes?
sorry -- seconds. >If seconds, does it actually read the whole > thing into memory in that time, or is there some kind of delayed read > going on? I think it reads it all in. However, now that you bring it up, I think "timeit" does it a few times, and after the first time, there may well be disk cache that speeds things up. In fact, as I recently wrote the file, there may be disk cache issues even on the first read. I'm no timing expert, but there must be ways to get a clean time. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
