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Re: anyone notice speed of 2.17.95 on Windows ?
From: |
David Kastrup |
Subject: |
Re: anyone notice speed of 2.17.95 on Windows ? |
Date: |
Fri, 13 Dec 2013 09:49:57 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
Werner LEMBERG <address@hidden> writes:
>> 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
>> 5 times for each character in a Text Script
>> ...
>> 1 time for each notehead
>> 5 times for each rest
>
> Ouch. `FT_Get_Name_Index' is quite a slow function, indeed, so
> caching its results would speed up things a lot.
>
> Note that speeding up the function itself was never on my radar – in
> all the years I'm working on FreeTpye there was not a single request
> to do so, IIRC. Modern fonts use the SFNT container format, centered
> around glyph indices, not glyph names. In other words, looking up
> glyph indices from glyph names is not a central function in most
> cases.
>
> I will check whether I can improve that in FreeType.
Is there a reason this would have such a significantly different impact
in Windows?
--
David Kastrup
- Re: anyone notice speed of 2.17.95 on Windows ?, (continued)
- Re: anyone notice speed of 2.17.95 on Windows ?, David Kastrup, 2013/12/15
- Re: anyone notice speed of 2.17.95 on Windows ?, Werner LEMBERG, 2013/12/15
- Re: anyone notice speed of 2.17.95 on Windows ?, Trevor Daniels, 2013/12/15
- Re: anyone notice speed of 2.17.95 on Windows ?, David Kastrup, 2013/12/15
- Re: anyone notice speed of 2.17.95 on Windows ?, Mike Solomon, 2013/12/15
- Re: anyone notice speed of 2.17.95 on Windows ?, Keith OHara, 2013/12/15
- Re: anyone notice speed of 2.17.95 on Windows ?, Devon Schudy, 2013/12/15
- Re: anyone notice speed of 2.17.95 on Windows ?, David Kastrup, 2013/12/15
- Re: anyone notice speed of 2.17.95 on Windows ?, Mike Solomon, 2013/12/14
- Re: anyone notice speed of 2.17.95 on Windows ?, Werner LEMBERG, 2013/12/13
- Re: anyone notice speed of 2.17.95 on Windows ?,
David Kastrup <=
- Re: anyone notice speed of 2.17.95 on Windows ?, Werner LEMBERG, 2013/12/13
- Re: anyone notice speed of 2.17.95 on Windows ?, Keith OHara, 2013/12/13
- Re: anyone notice speed of 2.17.95 on Windows ?, Werner LEMBERG, 2013/12/13
- Re: anyone notice speed of 2.17.95 on Windows ?, Keith OHara, 2013/12/13
- Re: anyone notice speed of 2.17.95 on Windows ?, Francisco Vila, 2013/12/11
- Re: anyone notice speed of 2.17.95 on Windows ?, David Kastrup, 2013/12/10
- Re: anyone notice speed of 2.17.95 on Windows ?, Mike Solomon, 2013/12/10
- Re: anyone notice speed of 2.17.95 on Windows ?, David Kastrup, 2013/12/10
- Re: anyone notice speed of 2.17.95 on Windows ?, Mike Solomon, 2013/12/10
Re: anyone notice speed of 2.17.95 on Windows ?, Trevor Daniels, 2013/12/10