Mailinglist Archive: zypp-devel (226 mails)

[Josef Reidinger <jreidinger@xxxxxxx>]

Josef Reidinger wrote:
> I use in some place boost function replace all. I see in zypper, that 
> this function jano implement. So I test which is faster and also contain 
> gsub from zypp String which is not in place (so must copy result).
> Due to result I add janpo's implementation to zypp and replace all 
> boost::replace_all
>
> I attach test source.
> Here is result (10000 and 10000000 loops):
> zypper gsub boost
> user time: 9
> system time: 0
> jano replace_all boost
> user time: 7
> system time: 0
> boost replace_all boost
> user time: 84
> system time: 0
> jreidinger@zofie:~/tmp/testing>
> jreidinger@zofie:~/tmp/testing> g++ test.cc
> jreidinger@zofie:~/tmp/testing> ./a.out
> zypper gsub boost
> user time: 769
> system time: 0
> jano replace_all boost
> user time: 689
> system time: 0
> boost replace_all boost
> user time: 8626
> system time: 6
>
> Pepa


Another note, I test it with different size of from and to string and 
result is, that gsub then replace_all is faster when from expect lot of 
replacing.
So if replace same length strings then in-place replace all is better 
and if lenght is different and finding string have more occurrences then 
gsub and copy c'tor is better.
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