Search results

V3 perfomance charts

Status: Open.

#1335 In microsoft/mimalloc;

· oscardssmith opened on Jul 17, 2026

macOS heap corruption at thread exit (SIGTRAP) since v3.4.0/v3.4.1's fixed-TLS-slot change (126/127) -- bisected to f211b370

Status: Open.

#1333 In microsoft/mimalloc;

· psiha opened on Jul 16, 2026

Use MEM_64K_PAGES?

Status: Open.

#1329 In microsoft/mimalloc;

· runewalsh opened on Jul 10, 2026

Two independently-linked mimalloc v3 instances (CPython 3.14 vendored + static in a Python extension) SIGSEGV in _mi_theap_collect_retired at process exit when Arrow's v2 copy is also loaded (macOS arm64)

Status: Open.

#1327 In microsoft/mimalloc;

· kkollsga opened on Jul 8, 2026

Possible Windows thread-state issue with gRPC worker threads (CreateThread) in mimalloc 3.3.2

Status: Open.

#1324 In microsoft/mimalloc;

· AnneJanB opened on Jun 29, 2026

Requesting Documentation for Using Subprocess

Status: Open.

#1316 In microsoft/mimalloc;

· kalaxy opened on Jun 23, 2026

Segfault with 1 arena through mi_manage_os_memory_ex and multiple per-thread heaps through mi_heap_new_in_arena

Status: Open.

#1313 In microsoft/mimalloc;

· MIvanchev opened on Jun 19, 2026

Assertion failed in _mi_arenas_page_abandon on macOS arm64 under high multi-thread load

Status: Open.

#1306 In microsoft/mimalloc;

· tuxzz opened on Jun 5, 2026

When mi_os_prim_alloc_aligned falls back on overallocation, it drops allow_large

Status: Open.

#1290 In microsoft/mimalloc;

· moskupols opened on May 9, 2026

[Crash] mimalloc v3.3.1 crash on android in multi thread allocation

Status: Open.

#1288 In microsoft/mimalloc;

· p2kyc0ng opened on May 8, 2026

RSS regression: v3.1.5 → v3.3.0 shows +81% VmRSS on musl/Alpine (26 MB → 47 MB)

Status: Open.

#1282 In microsoft/mimalloc;

· justeff opened on Apr 23, 2026

LLM audit

Status: Open.

#1271 In microsoft/mimalloc;

· Zoxc opened on Apr 18, 2026