[Kst] Re: branches/work/kst/portto4/kst/src

[Brisset, Nicolas]

> SVN commit 1216165 by kuemmel:
> 
> Some ascii reading optimization:
> 
> Here some measurments: gyrodata c&p to 8 million rows
> 
> Delimiters (comment, column)      : time in readColumns
> -----------------------------------------------------------
> No comment, custom: one space     : 1.69102 seconds
> No comment, whitespace            : 2.11194 seconds
> default comment, custom: one space: 4.01525 seconds (default comment
with
> 4 characters)
> default comment, whitespace       : 4.34039 seconds
> default comment, custom ,;|       : 6.49383 seconds (space at the end
of 4
> characters)
Thanks Peter! This is very interesting and of big practical interest.

A couple of questions:
- does the overcost of comments increase with the number of symbols? I'd
like to remove :/; and leave only # in the default comments because of
all the confusion it creates => what would the result be with only "#"
as comment indicator? (If it's a big penalty, we could leave the field
empty by default and put some explanations in the tooltip)
- how does it compare to the situation before the last changes you made?
(In other words, is the speed still the same as a couple of days ago, or
have you been able to improve it further)?

Nicolas


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