Performance Implemented

Implemented mechanisms

Reviewed: 2026-11-01 · Source: b7140848 · Availability: current main; stable/main boundaries are stated below.

Present in reviewed main; this does not by itself mean enabled, in the latest stable, fully qualified or faster in every game. Source presence, release availability, configuration and evidence are separate. Complete43-merge register, controls, measured outcomes.

Mechanism	Default / apply / platform	Availability	Delivered benefit and evidence boundary
Bulk packet processing	On; GL/Vulkan; live	Earlier stable	Batch eligible arrays; scalar fallback preserves malformed/unsupported behavior.
Fast fence polling	On; GL/Vulkan; live	Earlier stable	Exact32-bit fence read avoids general lock route; ordering remains authoritative.
Windows QPC / short waits	On; Windows waits	Earlier stable	Exact clock conversion and interruptible waits; wake/CPU tradeoff is workload-specific.
OpenGL native S3TC	On; restart	Earlier stable	Supported compressed uploads avoid CPU decode; Vulkan BC is separate.
Bounded vertex uploads	On; Vulkan; live	Earlier stable	Repack only needed span with bounds checks.
Clean texture stages	Automatic eligible shortcut	Earlier stable	Retain identity/freshness guards; extra #258 policy consumer unmerged.
Color-download folding	On; Vulkan; live	Earlier stable	Eligible copy shares active submission; unsupported copies remain separate.
Hybrid rendering	Prewarm; restart	Earlier stable; later readiness main-only	Fallback while specializing supported draws; not guaranteed stutter removal.
Three shader cache layers	Cache On	Earlier stable; later readiness main-only	SPIR-V, learned recipes and driver bytes save different work; no universal FPS claim.
Unchanged shader early-out	On; Vulkan hybrid	Earlier stable	Skip redundant executable selection while uniforms still update.
Transient growth	On; Vulkan; restart	Earlier stable	Bounded capacity retention trades memory for fewer drains.
Unchanged scanout	Automatic guarded route	Earlier stable	Reuse only a complete matching scanout identity.
Vertex freshness/private versions #85/#89/#125	Avoid ordered copies On; Vulkan	Earlier stable	Correct GPU-authored bytes first; direct unread pages/private versions avoid eligible copies.
Mono sinc #182 / DSP JIT default #183	Mono automatic; JIT On; realtime Off	Latest stable	Avoid duplicate mono work; JIT default selects an existing engine.
ADPCM block reuse #187	Automatic fresh-byte identity	Main only	Owned cross-callback block cache; final native repeatable game gain not established.
SGE/payload mappings #190/#275	Callback-bounded reuse	Main only	Reuse mappings while reading current bytes; issue310 native losses retained.
Local format #191	Automatic per callback	Main only	Decode CFG_FMT once; broader persistent controls remain research.
Voice workers #200/#201/#305	Auto 1–4; explicit 1–16; restart	Auto-four/completion repair main-only	Bound overhead and preserve worker completion/exit ownership; not multiple Xbox CPUs.
Generated FNSTSW AX #296	Within x86_64 hard FPU; restart	Main only	Large focused status-time reductions; retained modest PGR2 scene cost/context gaps.
Texture/depth correctness	Automatic eligible routes	See register	Fresh DMA identity, guest-write preservation, cubemap mips and DOT_ZW; no invented FPS.
Depth-alias foundations #282–#289	Bounded foundations	Main only	Ownership/retention/layout/dispatch/recorder delivered; held #290/#291 end-to-end consumers absent.
Input/GPU selection/build identity	Saved configuration and guarded fallbacks	Mixed; register gives boundary	Usability/compatibility and crash repair rather than universal speedup.
Diagnostics and production fixtures	Explicit tools/tests	Later additions main-only	Read-only ownership/finish attribution and deterministic regression coverage; runtime gain N/A.

Historical researches remain dated. Shader Browser is removed, linear #189 unmerged and GP HLE unmerged. Research/retired.