Not completely sure if it's worth having for 8.0, but opening this to share the target I'm trying to reach.
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v2: ntdll: Implement Low Fragmentation Heap.
ntdll: Introduce per-thread free lists for heap blocks.
ntdll: Introduce a new BLOCK_FLAG_SPLIT heap block flag.
ntdll: Introduce a new subheap thread affinity field.
ntdll: Introduce a new heap block_init_used helper.
ntdll: Introduce a new heap free_list_init helper.
ntdll: Count allocations and automatically enable LFH.
ntdll: Implement HeapCompatibilityInformation.
https://gitlab.winehq.org/wine/wine/-/merge_requests/1628