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improve free on macos

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This commit is contained in:
Daan 2025-02-05 20:55:21 -08:00
parent 1657bfb453
commit 515047b676
3 changed files with 26 additions and 17 deletions
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4
include/mimalloc/internal.h
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@ -492,7 +492,7 @@ static inline mi_page_t* _mi_unchecked_ptr_page(const void* p) {
// 2-level page map:
// double indirection, but low commit and low virtual reserve.
//
// the page-map is usually 4 MiB and points to sub maps of 64 KiB.
// the page-map is usually 4 MiB (for 48 bits virtual addresses) and points to sub maps of 64 KiB.
// the page-map is committed on-demand (in 64 KiB parts) (and sub-maps are committed on-demand as well)
// one sub page-map = 64 KiB => covers 2^(16-3) * 2^16 = 2^29 = 512 MiB address space
// the page-map needs 48-(16+13) = 19 bits => 2^19 sub map pointers = 4 MiB size.
@ -519,7 +519,7 @@ static inline mi_page_t* _mi_checked_ptr_page(const void* p) {
size_t sub_idx;
const size_t idx = _mi_page_map_index(p, &sub_idx);
mi_page_t** const sub = _mi_page_map[idx];
if mi_unlikely(sub == NULL) return NULL;
if mi_unlikely(sub == NULL) return (mi_page_t*)&_mi_page_empty;
return sub[sub_idx];
}