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: Wim Lewis <email@hidden>
- Date: Wed, 21 Aug 2013 16:57:31 -0700
On 21 Aug 2013, at 4:44 PM, Diederik Meijer | Ten Horses wrote:
> The web service returns the list lightning fast, but in order to get the count number added to each of the >300 articles html <h4> header, I am looping through the list and call NSString's stringByReplacingOccurancesOfString:withString: on each item.
>
> There must be a more efficient way to update the html string loaded from the local file, obviously doing more than 300 of these replace actions is slow and inefficient.
The -stringByReplacing... method has to copy the entire string each time you do a replacement. You might be able to get a significant speedup making a mutable copy of the original string, calling -replaceOccurrencesOfString:withString: repeatedly, and (possibly) calling -copy to make a final immutable copy.
Depending on what you're doing, though, it might make more sense to load the original string into the WebView and manipulate the WebView's DOM to update all of the counts and things.
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