[MERGE] rand_chars() optimization

[John Arbash Meinel]

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Martin Pool wrote:
> On 3/14/07, Aaron Bentley <aaron.bentley at utoronto.ca> wrote:
>> This patch, like most optimizations, reduces legibility.  So far, I
>> haven't seen any evidence that it makes any Bazaar operation observably
>> faster.  So to my mind, there's no justification for including it.
> 
> Yes, I'd like to see some evidence of an overall speedup.  I guess the
> most likely place would be in adding many new files.
> 

Not likely, because we only generate 1 random character string, and then
re-use it with a counter.

John
=:->

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