Re: Analysis of redisplay performance on Windows

[Jason Rumney]

YAMAMOTO Mitsuharu wrote:

>> According to the document below, Uniscribe seems to provide some
>> mechanism to defer heavy operations such as get_frame_dc and
>> SelectObject.

Yes, that seems to work if we switch to using uniscribe for encoding
characters. Since the gdi backend is only used for bitmap fonts and
older versions of Windows, I've switched off glyph indexing there for a
similar performance improvement. It hasn't had as bad an effect as I
expected with false positives when detecting support for a character.