That's just one example. There's plenty of APIs that force garbage to be created for no good reason. For string.split what I've done when it was critical, is to

That's just one example. There's plenty of APIs that force garbage to be created for no good reason. For string.split what I've done when it was critical, is to statically allocate an array for each type of split. For other APIs, I'd create a state object for each request or piece of work that contains assorted buffers and other temp objects, then pass it around as needed. Ugly, but at high processing rates, every allocation counts.