Re: anyone notice speed of 2.17.95 on Windows ?

[Keith OHara]

> On Dec 13, 2013, at 9:07 AM, Keith OHara <address@hidden> wrote:
>
> > Open_type_font:: and Pango_font::name_to_index() each call FT_Get_Name_Index(). 
> >  Inserting print statements to trace those calls I find that FT_Get_Name_Index 
> > is called:
> > 7 times for each character in a Tempo

The layers of functions that result in repeated calls to the skylining code 
have changed since the original skylines patch.  The latest change was

author  David Kastrup <address@hidden>    
         Thu, 21 Feb 2013 19:02:48 +0000 (20:02 +0100)
 Issue 3200: Make ly:make-unpure-pure-container accept a single callback

 Like with fixed values, this gets duplicated for the pure value as
 well, but converted into a callback taking two more arguments (which
 are ignored).

This type of unpure-pure-container is not a container of two functions but 
rather a single callback function, that promises to refrain from forcing 
line-break decisions (to be 'pure') and that ignores the two arguments giving 
the start- and end- of the line it would be on in the tentative line-breaks 
under consideration.

In this case repeated calls will recompute the same value, so I see no reason 
to keep the function-call pointer in place after the first use.  So I suggest 
we treat this case as if it were a simple lookup of a property, rather than a 
'pure' lookup.  http://codereview.appspot.com/42190043

This case includes the function to find skylines for Lyrics and TextScripts.


On Thu, 12 Dec 2013 23:45:45 -0800, Mike Solomon <address@hidden> wrote:

> My LilyPond is not working for some reason (see previous e-mail about 
> debugging).  Once I get it up and running, I’ll have a go at this.

Could you look at issue 3512 first ?
If we get clear on what unpure-pure is all about we might be able to simplify 
things.

For example, it seems to me that the unpure-pure-container with a single 
callback is not logically connected to any other unpure-pure-containers, so 
should have its own tag and different behavior.