[SR-Users] Header field manipulation

[Spencer Thomason]

Thanks! 


On Jul 12, 2011, at 12:18 PM, Daniel-Constantin Mierla wrote:

> Hello,
> 
> On 7/12/11 8:06 PM, Spencer Thomason wrote:
>> Hello all,
>> Is it preferable to to a check before removing a header field or to simply call remove_hf()?  Are there any performance considerations?
>> 
>> i.e.
>> if is_present_hf("X-Account-Code")
>> 		remove_hf("X-Account-Code");
>> 
>> vs
>> remove_hf("X-Account-Code");
> if you just remove it in the IF condition, then the second is better.
> 
> is_present_hf() searches the through the header lists and returns true at first match or false when all headers were tried without a match. remove_hf() searches as well through the list of headers and removes when the name matches, going up to the last header.
> 
> With latest CPUs processing power, probably will be an unnoticeable performance difference, all the operations are in memory. But the check for the existence of that header is prety much useless in your case.
> 
> Cheers,
> Daniel
> 
> -- 
> Daniel-Constantin Mierla -- http://www.asipto.com
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>