Question

If I have the following code:

NSString* test = @"12345... 1Kb worth of characters";
test = [test substringFromIndex:512];

Then would the memory consumed by test be halved (from 1024 to 512 bytes) or do I have to do something to tell it to release the memory?

Thanks,

Joe

Answer 1

After such call new memory for substring will be allocated. But your string test is marked as autoreleased. So previous value of test will be automatically released and new value will be assigned. Notice that new value (substring) will be too autoreleased and you don’t need to release it manually.