[Interest] Qmap insert versus operator[]

Thiago Macieira thiago.macieira at intel.com
Tue Nov 5 18:20:41 CET 2013

On terça-feira, 5 de novembro de 2013 13:45:07, Olivier BARTHELEMY wrote:
> Hi,
> Given code that would look like :
> QMap<SomeType> theMap;
> ....
> {
>   theMap[someIndex] = someValue;
> }
> Is it safe to assume that replacing the operator with the insert method
> will improve the performance for new elements (copy constructor used
> directly instead of default constructor + assignment operator ), while not
> being slower for the modification of an element that already exists?

Konstantin is right -- if you care about performance at this level, check with 
a profiler.

However, given what I know from QMap's source code, you'll probably find out 
that you are right.

Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center
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