Comment by carlos256

11 hours ago

If you need to optimize the allocator you are doing it wrong.

2 comments

carlos256

That's a false dichotomy: you optimize both the application and the allocator.

A 0.5% improvement may not be a lot to you, but at hyperscaler scale it's well worth staffing a team to work on it, with the added benefit of having people on hand that can investigate subtle bugs and pathological perf behaviors.

cbarrick 10 hours ago

Exactly. No need to engineer an allocator. You only live once!

    void* malloc(size_t size) {
        void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0);
        return (ptr == MAP_FAILED) ? NULL : ptr;
    }

    void free(void *ptr) { /* YOLO */ }