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From: rws@EXPO.LCS.MIT.EDU (Bob Scheifler)
Newsgroups: comp.windows.x
Subject: Re: Performance Delta of X11 vs X10 When Creating Many Windows
Message-ID: <8901060033.AA06675@EXPIRE.LCS.MIT.EDU>
Date: 6 Jan 89 00:33:43 GMT
References: <8901051550.AA01283@EXPO.LCS.MIT.EDU>
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    it now takes minutes to map the same windows!

    Does anyone have a clue why this might be happening, or any suggestions
    on what to do about it?

I wouldn't be surprised if the problem was in the server.  I remember having
similar problems back in X9-10 days, until I did considerable hacking on the
server window operations.  There could well be similar problems in X11.  I
know of at least one company that has done some very significant work in the
area of speeding up the window ops in the X11 server, but they haven't given
any of the code or ideas back to us :-(.  But, without actually seeing and
profiling the particular application, it's hard to know anything for sure.