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From: Richard Stallman <rms@gnu.org>
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Subject: Re: x-create-frame is sluggish
Date: Sat, 25 Sep 2004 11:36:07 -0400
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    I think we can cache XFontSet in struct x_display_info per
    each base_fontname.  Then we can avoid calling of
    XCreateFontSet when we create a new frame on the same
    display with the same font.

Do you want to implement this?

Would it be a big or unreliable change,
that we would not want to install now?