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Re: Performance regression in CVS HEAD's *compilation* buffer


From: Stefan Monnier
Subject: Re: Performance regression in CVS HEAD's *compilation* buffer
Date: Sat, 29 Jan 2011 10:46:55 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

>>> I updated my CVS tree to HEAD today (2009-02-03, around noon PST),
>>> compiled it, and started using it.  My previous sync had been around
>>> 2008-12-01.  During that interval, the performance of inserting long
>>> lines into the *compilation* buffer has dropped by an order of
>>> magnitude.
>> I've only recently started taking a look at compile.el and haven't had
>> a chance to investigate this problem, but I just tried:
>> M-x compile RET echo C-u 6400 x RET
>> and it finished instantly.
> Because that would arrive batched.  Try
> M-x compile RET echo C-u 6400 x | dd obs=1 RET

Good point.  But I just tried it and it seems to still be "instantaneous".


        Stefan



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