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High performance malloc implementation
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| uintptr_t base; | |
| const uintptr_t height = 100000000; | |
| std::mt19937 rng; | |
| [[gnu::constructor]] void init_malloc() { | |
| base = (uintptr_t) sbrk(height); | |
| } | |
| void* malloc(size_t) { // parameter ignored, we don't need it | |
| return (void*)(base + rng() % height); // odds of any collision is like, low | |
| } | |
| void free(void*) {} // no-op |
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Apr 1, 2021
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