Re: [Matplotlib-users] bug in saving figure with dashed lines

[Darren D. <dd...@co...>]

On Tuesday 01 August 2006 08:52, John Hunter wrote:
> >>>>> "Jouni" == Jouni K Seppanen <jk...@ik...> writes:
>
>     Jouni> The draw_lines method in the PS backend divides the line
>     Jouni> into subsequences of at most 50 points, and calls the
>     Jouni> "stroke" operator for each subsequence, which in effect
>     Jouni> resets the dash offset. Thus if 50 consecutive points fit
>     Jouni> within a dash, the line appears solid.
>
> 50 seems awfully small to me.  There are maximum length path
> limitations of some postscript interpreters which is why we batch
> these up.  Darren, could we get away with a step of 1000 here rather
> than 50?

Here are GGV's render times for a line containing 1e6 points:

division | time (s)
50		3
1000	9
100000	8
none	28

I bumped it up to 100,000 in svn 2644, which seems to have improved the dash 
problem.

Darren