Reflex AntiLag

⚡ Reflex AntiLag

NVIDIA Reflex-style frame pacing for Minecraft — on ANY GPU. 在 Minecraft 中复刻 NVIDIA Reflex 的帧对齐低延迟 —— 支持任意显卡。

Modrinth | GitHub Source | Issue Tracker

Client-Only mod • Fabric & NeoForge • NVIDIA / AMD / Intel • OpenGL & Vulkan

⚡ What is Reflex AntiLag? (English)

When your GPU is the bottleneck — heavy shaders, high render distance — vanilla Minecraft lets the CPU sprint ahead and queue up draw calls 1 to 3 frames deep inside the driver. Your mouse has already moved, but the frame that would show that movement hasn't started rendering yet. That gap is what feels like "sluggish aim."

Reflex AntiLag puts the CPU to sleep at the top of each frame and wakes it precisely in time to hand the completed command stream to the GPU the instant it goes idle. The driver queue drains to zero, inputs are as fresh as the hardware allows, and the GPU stays fully saturated — so you lose no FPS.

🌟 Key Highlights

• 🎯 Queue Drained to Zero: Submission is aligned to the exact moment the GPU frees up, collapsing 1–3 frames of driver backlog into a sub-millisecond error.
• 🖱️ Freshest Input Polling: The sleep sits strictly before input polling, so the first thing that happens on wake is reading your mouse.
• 🧩 Real Reflex Marker Parity: Instruments all eight NVIDIA Reflex points — Sleep, InputSample, Simulation Start/End, RenderSubmit Start/End, Present Start/End — and reads genuine GPU-side hardware timestamps.
• 🧠 Zero Config: Wake-up timing is derived entirely from live measurements, with no magic constants and no artificial clamps. Install and play.
• 📊 F3 Pipeline Gantt: Six rows (Last, Input, Simulation, RenderSubmit, Present, GPU) plus a signed alignment error showing exactly how well the pacing landed.
• 🚀 Universal Compatibility: NVIDIA GeForce, AMD Radeon and Intel Arc/iGPU alike. Native OpenGL & Vulkan, including the 26.2 / 26.3 RenderPearl architecture.

🇨 这是什么？(中文说明)

当显卡成为瓶颈时（高倍光影、高视距），原版 Minecraft 会让 CPU 远远跑在前面，把渲染指令在驱动里排到 1~3 帧之后。你的鼠标其实已经动了，但显示这一动作的画面还没开始渲染 —— 这就是"瞄准发黏"的来源。

Reflex AntiLag 在每帧起点让 CPU 休眠，并在显卡刚好空闲的那一刻精确唤醒它，把已经准备好的完整指令流立刻交出去。驱动队列被彻底排空，输入新鲜度达到硬件上限，同时显卡保持满载 —— 不损失任何帧率。

🌟 核心特性

• 🎯 队列彻底排空：把提交时刻对齐到显卡变闲的瞬间，将 1~3 帧的驱动积压压缩到亚毫秒级误差。
• 🖱️ 最新鲜的输入采样：休眠严格位于输入轮询之前，醒来的第一件事就是读取鼠标与键盘。
• 🧩 真正的 Reflex 标记级实现：完整埋设 NVIDIA 的八个标记 —— Sleep、InputSample、Simulation 起止、RenderSubmit 起止、Present 起止，并读取真实的显卡硬件时间戳。
• 🧠 零配置开箱即用：唤醒时机全部由实测数据推导，不含魔数、不设人为上下限，安装即处于最佳状态。
• 📊 F3 实时时序甘特图：Last / Input / Simulation / RenderSubmit / Present / GPU 六行逐帧实测，并提供带正负号的对齐误差，一眼看出这一帧对齐得准不准。
• 🚀 全显卡与全渲染后端：NVIDIA、AMD、Intel 全显卡通用；原生支持 OpenGL 与 Vulkan，完整适配 26.2 / 26.3 官方图形架构。

支持版本：Minecraft 1.21.5 – 1.21.11、26.1 – 26.3 · Fabric 与 NeoForge

❓ Frequently Asked Questions / 常见问题

• Q: Do I need to configure anything? / 需要手动调参吗？ A: No. Every wake-up time is computed from measured frame data, so it follows your scene and hardware automatically. An optional manual offset exists for experimentation. 完全不用。 唤醒时机全部由实测推导，场景或硬件变化时自动跟随；另有一个可选的手动偏置供折腾。

• Q: Is this just NVIDIA Reflex? / 这就是 N 卡的 Reflex 吗？ A: Same algorithm, reimplemented without vendor drivers. Reflex needs GPU timestamps and a controllable sleep — both available on AMD and Intel, so the scheduler is genuinely vendor-neutral. 是同一套算法的驱动无关重实现。Reflex 依赖 GPU 时间戳与可控休眠，A/I 卡同样具备，因此与显卡厂商无关。

• Q: Compatible with Sodium & Iris shaders? / 兼容"钠"和光影包吗？ A: 100% Yes. The benefit grows with GPU load, so shader packs are where it shines most. 完美兼容！ 与 Sodium、Iris、Embeddium 等主流优化及光影包无缝协同，显卡负载越高收益越明显。

• Q: Will it lower my FPS? / 会掉帧吗？ A: No. It changes when a frame starts, never how much work it does. The GPU stays fed, so a GPU-bound scene keeps its frame rate while latency drops. 不会。它只推迟一帧的开始时机，不减少任何工作量。显卡持续满载，GPU 受限场景下帧率不变而延迟下降。

• Q: Does it help when I'm already CPU-bound? / CPU 受限时有用吗？ A: It detects this and steps aside — the scheduler stops delaying and you run at full speed, so there's no penalty. The F3 panel reports the alignment as n/a when no pacing was applied. 会自行让路：检测到 CPU 已跑满、对齐不可能时就不再休眠，全速运行不受惩罚。F3 面板在未执行对齐时显示 n/a。

If this mod improves your gameplay responsiveness, feel free to give it a star on GitHub!