Changelog

[3.7.0]

Added

• Rosetta 2 support for macOS (WoWSilicon)

  • Full compatibility via ROSETTA_X87_DISABLE_CACHE=1
  • Safe Lua fast paths avoiding Rosetta crashes
  • Wine/CrossOver JIT cache disable
  • Inline-patched SetThreadIdealProcessor

• Multithreaded systems for major performance bottlenecks

  • Combat log parser with 4-worker thread pool (auto-disables in raids)
  • Addon dispatcher with 4-worker thread pool
  • Spell prefetching with async loading
  • MPQ prefetching with zone transition prediction
  • Sound prefetching based on spell casts and zone transitions
  • Async quest/achievement data loading
  • Multithreaded nameplate renderer (reduces CPU load in 25-man raids)

• 27 Lua fast paths with direct C calls

  • string.format: high fast path hit rate
  • All common math and string operations optimized
  • Phase 2 hooks: math.random, math.sqrt, string.rep, string.find (plain mode)

• Advanced memory management with mimalloc

  • Faster Lua operations
  • Low Fragmentation Heap for all allocations
  • Lua string table pre-sizing to reduce hash resize spikes

• High-precision timing system

  • QPC-based microsecond precision
  • High cache hit rate
  • Adaptive timer resolution
  • Hardcoded FPS cap raised from 200 to 999

Changed

• Network stack optimizations

  • TCP_NODELAY for reduced latency
  • TCP_QUICKACK for faster acknowledgments
  • Optimized buffer sizes
  • Low-delay TOS
  • Fast keepalive settings

• File I/O improvements

  • MPQ memory mapping for instant reads
  • Adaptive 64KB/256KB caching
  • Sequential-scan hints for MPQ access
  • Skip FlushFileBuffers for tracked MPQ handles

• System call optimizations

  • 512-slot GetModuleHandle cache
  • Fast ASCII string operations
  • 38 kernel-call caches across 8 batches
  • IsBadReadPtr/WritePtr fast path
  • Thread affinity for optimal core pinning
  • Swap present hook for glFinish skip

• CRT SSE2 fast paths

  • strlen/strcmp/memcmp/memcpy/memset with page-boundary guards
  • memchr/strchr with SEH protection
  • pow() integer fast-path (x^2=x*x, sqrt, etc.)
  • strstr Boyer-Moore-Horspool algorithm

Fixed

• Alt-tab crash in fullscreen mode (SEH guard implementation)
• UI scaling issues after alt-tab
• Window resize handling
• Keyboard layout switching
• Hardware cursor stability - identified and disabled problematic caches (GetSystemMetrics, Asset path resolver)

Performance

• Frame time: Smoother frametimes in addon-heavy gameplay
• CPU usage: Noticeable reduction in raids
• Lua operations: Faster with mimalloc allocator
• Timing cache: High QPC cache hit rate
• String formatting: High fast path hit rate
• Zone transitions: Reduced loading stutters
• Spell cast lag: Reduced via predictive prefetching

Disabled (Stability Issues)

• GetSystemMetrics cache - breaks hardware cursor with RTSSHooks.dll (found via bisection)
• Asset path cache - stale mimalloc pointers crash teardown/logout (found via bisection)
• Unit API fast paths - returns 0 HP
• GetSpellInfo cache - icon corruption + relog crash
• Phase 2 writes (rawset/insert/remove/next) - direct RawTValue* hangs
• Phase 2 reads (rawget/concat/unpack) - direct RawTValue* hangs
• ipairs factory hook - closure creation crashes (architectural mismatch)
• Deferred field updates - UI/texture flickering (immediate-mode rendering)
• GetModuleFileName cache - conflicts with OBS hook chain
• CRT mem fastpaths - VA exhaustion (dungeon finder crash at 2.4GB)
• Object visibility cache - stale object pointers, no synchronization
• table.sort fast path - Lua table corruption (0x851E01 AV)
• string.gsub fast path - Lua string corruption
• Lua bytecode cache - WoW modified bytecode incompatible
• Frame throttle - MoveAnything position corruption (race conditions)
• Async texture loading - loading screen regression
• Model async workers - loading screen regression

Testing Credits

Massive thanks to the stability testing team:
Morbent, Billy Hoyle, tuan, NoGoodLife, feh_dois, David (_oldq), UNOB, DarkRockDemon, Raymond, Vandal, Mantork, Falcon, Muus

Every crash report, every bisection test, every "hey this broke my addon" message directly shaped this release.

[3.6.1] - Previous Release

See GitHub releases for full history.