I have to use so many String arrays

[rsaikamesh]

Hi All,

In my c++ application, I need to use 60 string arrays with the size of 16. If I create this much of arrays, will the performance of my application be affected?

[Ganon11]

So you are creating something like:

char strings[60][16];

This is 60 * 16 bytes of memory, or 960 bytes of memory - in other words, practically nothing. It is relatively large compared to other variables such as a single int, but I don't think it will be big enough to seriously affect your program's performance time.

[rsaikamesh]

So you are creating something like:

char strings[60][16];

This is 60 * 16 bytes of memory, or 960 bytes of memory - in other words, practically nothing. It is relatively large compared to other variables such as a single int, but I don't think it will be big enough to seriously affect your program's performance time.

I have to create like the following:

string str1[16];
.
.
.
string str60[16];

[Ganon11]

What you are creating here are 60 arrays of 16 strings. Are you sure this is what you require? I had assumed you meant you needed 60 strings that would hold 16 characters each, not 60 string arrays of 16 strings each.

[rsaikamesh]

What you are creating here are 60 arrays of 16 strings. Are you sure this is what you require? I had assumed you meant you needed 60 strings that would hold 16 characters each, not 60 string arrays of 16 strings each.

yes, I am sure about that. now please say, whether the performance will be affected or not?

[Ganon11]

Well, this will be 60 arrays * 16 entries * 4 bytes, which is 3840 bytes - still not a huge amount. But might I suggest instead of using

str1[16];
str2[16];
...
str60[16];

you may consider using a 2D array:

str[60][16];

[rsaikamesh]

Well, this will be 60 arrays * 16 entries * 4 bytes, which is 3840 bytes - still not a huge amount. But might I suggest instead of using

str1[16];
str2[16];
...
str60[16];

you may consider using a 2D array:

str[60][16];

Thank you very much!!!

[Banfa]

Well, this will be 60 arrays * 16 entries * 4 bytes.

Strictly speaking if using ~4kbytes of memory is a performance issue is platform dependent.

For instance on a PC with 1GByte of RAM then 4kbytes of memory is negligable, however on a microprocessor with 32kbyte of RAM 4kbyte is 12.5% of available memory and could be very significant.

[Extremist]

How about just using

string str60[60]; 

It would work in C++,

would there be a performance issue?