[PATCH 0 of 2] context, keyword: reduce use cases of expensive filectx.cmp

[Martin Geisler]

Nicolas Dumazet <nicdumz at gmail.com> writes:

> 2010/10/14 Christian Ebert <blacktrash at gmx.net>:
>> Hi,
>>
>> Only compare via filelog when needed, i.e. when comparing
>> against the working directory.
>
> Great, thanks.
>
>> These patches use isinstance(fctx, context.workingfilectx) to
>> check this.
>
> I've been told on IRC that it was actually a bad idea, because
> mem(file?)ctx do not inherit from workingfilectx.

Also, isinstance is slow and becomes slower the longer the inheritance
chain is.

-- 
Martin Geisler

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