When does static NSString* const mystring=@"SomeString" ; gets loaded into memory

Question

I have moved all string literals getting used in my app to a header file : myheader.h---

static NSString* const mystring1=@"SomeString1" ; 
static NSString* const mystring2=@"SomeString2" ; 
static NSString* const mystring3=@"SomeString3" ; 
static NSString* const mystring4=@"SomeString4" ; 
static NSString* const mystring5=@"SomeString5" ; 

and in main.cpp:

#include myheader.h

main(){
...code using  NSString* from header;
}

Will that increase my app load time?