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Delphi High Performance
book

Delphi High Performance

by Primož Gabrijelčič
February 2018
Intermediate to advanced content levelIntermediate to advanced
336 pages
7h 52m
English
Packt Publishing
Content preview from Delphi High Performance

Optimizing strings and array allocations

When you create a string, the code allocates memory for its content, copies the content into that memory, and stores the address of this memory in the string variable. Of course, you all know that by now as this was the topic of the previous chapter.

If you append a character to this string, it must be stored somewhere in that memory. However, there is no place to store the string. The original memory block was just big enough to store the original content. The code must therefore enlarge that memory block, and only then can the appended character be stored in the newly acquired space.

As we'll see further on in the chapter, FastMM tries to make sure that the memory can be expanded in place, that is, ...

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Publisher Resources

ISBN: 9781788625456Supplemental Content