Re: Fastest way to replace characters in string
Re: Fastest way to replace characters in string
- Subject: Re: Fastest way to replace characters in string
- From: Keary Suska <email@hidden>
- Date: Thu, 22 Aug 2013 12:16:23 -0600
On Aug 22, 2013, at 12:05 PM, Thomas Wetmore wrote:
> Steve,
>
> Sorry, again I was unclear. Here is what I am trying to say:
>
> Pre-allocation means to allocate space before you need it, which would be at init time.
>
> But there is no need to pre-allocate -- the first allocation can be postponed until the first item is put in the container or characters in the string.
>
> I assume the capacity argument is used at that first allocation.
>
> Pre-allocation and the capacity argument are wholly orthogonal concepts.
I googled around and found a post at StackOverflow (http://stackoverflow.com/questions/8636983/what-is-the-best-way-to-initialize-nsmutablestring-object) that links to the open-source implementation of CFString. From there you can see what the optimization technique is, although I didn't notice *when* it allocates.
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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