[Insight-users] accelerate reading (and writing)

[Sean McBride]

On 10/14/08 6:19 PM, Mathieu Malaterre said:

>On Tue, Oct 14, 2008 at 6:16 PM, Sean McBride <sean at rogue-research.com>
wrote:
>> On 10/13/08 10:38 PM, Thorsten W. said:
>>
>>>you know, i'am working with large image matrices.
>>>I reading a 1.88GB 26000x26000x24Bit BMP File. It takes 5 minutes!
>>>Writing tooks 4 minutes.
>>>
>>>Is there any possibility to update this process aside from update my pc?
>>
>> First you must determine what is causing the slowdown.  That's a lot of
>> data to be sure, but you should measure with a profiler to identify the
>> bottleneck.  Once the bottleneck is know, it will be clearer how to
>> potentially improve things.
>>
>
>You can access the raw number of your system using hdparm (MacOSX is
>FreeBSD...)
>
>http://gentoo-wiki.com/HOWTO_Use_hdpa
>rm_to_improve_IDE_device_performance#Benchmarking_devices

I agree the disk is likely to be a bottleneck, but it's always good to
not assume and to measure to be sure.  Thorsten said he is using Win XP
64bit so I'm not sure he can use hdparm.  I don't know of a good
profiling tool to recommend on Windows.

-- 
____________________________________________________________
Sean McBride, B. Eng                 sean at rogue-research.com
Rogue Research                        www.rogue-research.com 
Mac Software Developer              Montréal, Québec, Canada