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Re: address@hidden: Speed of all-completions]


From: Andreas Schwab
Subject: Re: address@hidden: Speed of all-completions]
Date: Tue, 15 Jun 2004 13:00:48 +0200
User-agent: Gnus/5.110002 (No Gnus v0.2) Emacs/21.3.50 (gnu/linux)

David Kastrup <address@hidden> writes:

> Andreas Schwab <address@hidden> writes:
>
>> This is due to this change:
>> 
>>      (Ftry_completion, Fall_completions, Ftest_completion): Bind
>>      case-fold-search to the value of completion-ignore-case when
>>      checking completion-regexp-list.
>> 
>> I've checked in a fix that avoids the overhead of specbind when
>> completion-regexp-list is empty.
>
> At the cost of being more expensive when it isn't.

Why is it more expensive?  The check for CONSP (completion-regexp-list)
has to be done anyway, and can be CSE'd by the compiler.

Andreas.

-- 
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux AG, Maxfeldstraße 5, 90409 Nürnberg, Germany
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."




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