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Re: How to fasten formatted printf? [message #92527 is a reply to message #92525]

Tue, 05 January 2016 08:34

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On Monday, January 4, 2016 at 9:53:14 PM UTC-5, Craig Markwardt wrote:
> On Monday, January 4, 2016 at 9:01:10 PM UTC-5, Yunfeng Tian wrote:
>> Hi all,
>>
>> I usually have over a thousand text files to write. Each file contains 9 columns and several thousand lines. The below is a test.
> ...
>> For 1000 files, it will take over 2 minutes. I wonder whether there is a way to do it very quickly.
>
> You are probably limited by I/O. You can investigate:
> 1. SSD or hybrid SSD drive
> 2. Some kind of "RAM disk"
> 3. Whether you can satisfy your requirements by writing unformatted binary files with WRITEU instead of formatted binary files with PRINTF.
> 3. Computer with better CPU and I/O throughput performance.
> Other than using binary files, there's really nothing you can do to your IDL code to make it faster.
>
> Craig

If you need it ultimately in ascii, one option is to have IDL write it in binary and then post-process it with a simple C program, which should be able to do the I/O much faster.

-Jeremy.

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[Message index]

		How to fasten formatted printf? By: enod on Mon, 04 January 2016 18:01
		Re: How to fasten formatted printf? By: Craig Markwardt on Mon, 04 January 2016 18:53
		Re: How to fasten formatted printf? By: Jeremy Bailin on Tue, 05 January 2016 08:34
		Re: How to fasten formatted printf? By: markb77 on Tue, 05 January 2016 09:57

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