StringBuilder由链表备份

Question

I notice that StringBuilder is backed up by an array, which makes it allocate a single memory block. I don't like that behavior because the memory is highly fragmented and somtimes it's hard to find a big enough block of memory, which triggers the GC...

I wonder if there is a version of StringBuilder backed up by a linked list, which would be more memory-friendly.

Answer 1

First of all I'd seriously question the need for an alternative: for most use-cases the implementation of StringBuilder is perfectly sensible and works just fine. Measure before you decide.

If you indeed need similar objects of such enormous size that this becomes a problem, then something like Ropes for Java might help: It's effectively a library of many different CharacterSequence implementations (with a common interface Rope ) optimized for different interactions.