From: Jeremy Kemper <jeremy@...>
Date: 2005-11-06T16:43:52+09:00
Subject: Re: Generation of Unique Symbols

On Nov 5, 2005, at 11:32 PM, Ryan Leavengood wrote:
> On 11/6/05, Eric Hofreiter <erichof425@yahoo.com> wrote:
>> But this is obviously not very efficient.  Is there a better way  
>> to do this?  If not I may just
>> go back to good old integers.
>
> For the fun of it I decided to benchmark your way versus mine. For
> 100,000 calls here are the results on my reasonably fast Windows XP
> laptop:
> [...]
> $sym1 = :AAAAAAAA
> def next_sim1
>   $sym1 = eval(":" + $sym1.id2name.next)
> end
>
> $sym2 = :AAAAAAAA
> def next_sim2
>   $sym2 = $sym2.to_s.next.intern
> end

# Avoid double-conversion.
$sym3 = 'AAAAAAAA'
def next_sim3
   $sym3.succ!.to_sym
end

Best,
jeremy