[MERGE] log performance

[Aaron Bentley]

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Robert Widhopf-Fenk wrote:
> On Thursday, June 22, 2006 at 22:46:19, Aaron Bentley wrote:
> If you have time look at the two messages with
> 
>   Subject: [PATCH] move lock_read() into "bzr log" 
> 
> The extra lock really gives a felt speedup of 2 on remote
> repos when getting only a few logs.

There is no way I would consider removing the lock from show_log.
cmd_log is not the only caller, and acquiring an already-held lock is
extremely cheap.

I don't see any explanation of what taking the lock earlier
accomplishes.  Are you trying to avoid reading the revision-history twice?

Aaron
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