Question

For the following code, in the destructor function of a class:

QSettings sets;
sets.setValue ("Category/Name", "abc");

Will the settings file get written again?

Or should I do this to reduce disk access:

if (sets.value ("Category/Name") != "abc") 
   sets.setValue (...);

Answer 1

Calling QSettings::setValue will force a write to the settings file even if the setting has not changed. As such, if you are trying to prevent writes to the settings file, your second approach is advisable.