整个大模型装进一个文件:goinfer 用纯 Go 跑推理,没有 Python、没有 llama.cpp、没有 CUDA 工具链

An Entire LLM in One File: goinfer Runs Inference in Pure Go — No Python, No llama.cpp, No CUDA Toolkit

Tech-Experiment #Go#本地推理#local-first#开源#LLM#单文件部署#结构化输出#GGUF
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📌 项目地址:https://github.com/townsendmerino/goinfer 文档站(Go 工程师的推理入门书):https://townsendmerino.github.io/goinfer/ 协议:MIT | 语言:Go | Star:12(2026-09-09)| 状态:Pre-1.0

一句话结论

如果你被 Python 依赖、CUDA 工具链、llama.cpp 编译这三件事折磨过,goinfer 值得你花二十分钟看一眼。

它把本地推理压缩成 Go 世界最朴素的那个形态:go install,出来一个静态二进制,拷到哪台机器都能跑。极端一点还能把模型权重直接烤进可执行文件——1.81 GB 的单个文件,双击就是一个能对话的 1.5B 模型,不下载、不安装、离线可用。

它解决的痛点:部署摩擦

本地推理这条路上,真正劝退人的往往不是模型效果,是装不上。

  • Python 环境冲突,一个 pip install 拖出半个生态
  • CUDA 工具链版本对不上,编译几十分钟后失败
  • llama.cpp 要选架构、要 CMake、要 C++ 编译器
  • 换台机器,全套重来

goinfer 的回答是:这些全都不要。

「It builds with no toolchain of any kind — no CUDA toolkit, no C++ compiler, no CMake, no Python — and cross-compiles like any other Go program.」

纯 Go、无 cgo,意味着交叉编译和普通 Go 程序完全一样。给同事发个演示、往气隙机器上部署、在 workshop 现场分发——这些场景下”一个文件”的价值远大于几个百分点的吞吐差距。

装它有两条路

下载二进制,什么都不用装:

# macOS arm64;换后缀适配你的平台
curl -fsSL -o goinfer-serve https://github.com/townsendmerino/goinfer/releases/latest/download/goinfer-serve-darwin-arm64
chmod +x goinfer-serve

从源码构建,需要 Go 1.27+:

go install github.com/townsendmerino/goinfer/cmd/serve@latest

这里有个坑作者写得很明白:上面那条构建的是 CPU 版。要 GPU 得走后端各自的入口,-tags metal 加在 cmd/serve 上不工作,而且会在构建时明确报错告诉你:

go install github.com/townsendmerino/goinfer/metal/cmd/serve@latest              # macOS
go install -tags cuda github.com/townsendmerino/goinfer/cuda/cmd/serve@latest    # Linux + NVIDIA

Release 里下载的 goinfer-serve 已经带好了——macOS 带 Metal,Linux 带 CUDA。跑 goinfer-serve --version 能看到当前这个二进制带了哪些后端。

四档产物,最后一档很特别

以 darwin-arm64 的 v0.16.0 资产为例:

资产体积是什么
goinfer-serve-<os>-<arch>~16 MB服务端——OpenAI + Anthropic API、Web UI、GPU 内建
goinfer-chat-<os>-<arch>8.3 MB单次运行时,指向你自己的 GGUF
goinfer-chat-0.5b-<os>-<arch>652 MB运行时和模型在同一个文件里
goinfer-chat-1.5b-<os>-<arch>1.81 GB同上,装的是 1.5B 编码模型

最后两档就是”一个文件就是一个模型”。而且这不是作者钦定的两个特例——从源码检出可以对任意支持的检查点跑同一条流水线:

go run ./demo/chat pull bartowski/google_gemma-3-4b-it-GGUF:Q4_K_M -embed darwin/arm64 linux/amd64
# → demo/chat/dist/goinfer-chat-google_gemma-3-4b-it-{darwin-arm64,linux-amd64}

出来就是静态、无 cgo、权重在里面的二进制。README 特意提醒:模型的许可证跟着二进制走,你要分发就得自己满足那个许可证。

拉模型不用装额外工具

运行时能直接从 HuggingFace 拉 GGUF,不需要 huggingface-cli:

./goinfer-chat-darwin-arm64 pull Qwen/Qwen2.5-Coder-1.5B-Instruct-GGUF          # 看这个仓库有什么
./goinfer-chat-darwin-arm64 pull Qwen/Qwen2.5-Coder-1.5B-Instruct-GGUF:q4_k_m   # 拉一个量化
./goinfer-chat-darwin-arm64 pull demo:1.5b                                       # 项目自己审过并锁定的

传输中断会续传,sha256 对着 HuggingFace 声明的值校验。goinfer 自己不托管任何权重,下载都来自 HuggingFace。

甚至可以省掉 pull 这一步,--model 直接接同样的引用,首次使用时下载:

goinfer-serve -model hf:Qwen/Qwen2.5-Coder-1.5B-Instruct-GGUF:q4_k_m

想要浏览器界面就加 -web,本地 http://127.0.0.1:8080 起一个 UI,聊天、浏览 HF 仓库、带进度条拉权重都能干。整个 UI 是一个内嵌的 HTML 文件,没有外部资源,所以和这个项目的其他部分一样离线可用。

基准测试:这部分才是真正让我高看一眼的地方

绝大多数推理项目的 README 会挑一个自己赢的场景放个柱状图。goinfer 不是这么写的。

Mac 冷启动(M1 Pro / 16GB,对比 Ollama 0.32.5 干同样的事):从零到拿到回答,25 秒 vs 33 秒,8MB 二进制、无守护进程、跑完不留东西。但作者紧接着说明:这一段只是冷启动,稳态解码是另一个测量。

Mac 稳态解码(v0.17.1,确认带 Metal,Qwen2.5-Coder-1.5B q4_K_M,交错测试):

goinfer 比 Ollama 慢 13-18%。

README 里原样写着这个数字,还附了一句:这替换了之前一个 v0.16.0 的读数,因为复核发现那次测的是一个没链接 Metal 后端的 Mac 二进制,测的不是引擎本身。

Linux + GPU:冷启动 56.5 秒,其中大头是 1.71 GiB 二进制的网络下载(~31.5 MB/s)——作者明确说这不是一个固定数字,是你网速的函数。稳态 CUDA 解码,匹配量化、交错测试、客户端侧 tok/s:goinfer 192.8 tok/s vs Ollama 183.6 tok/s,快约 5%。

然后又补了一刀:这次是短补全,等效上下文深度约 128;基准文档里更深的格子显示 Ollama 会随上下文增长反超。

最后是我最欣赏的一句:

「Measure it yourself rather than trust either number」(别信任何一边的数字,自己测)

harness 代码 scripts/bench_peer.py 就在仓库里,两边同样的权重、只测解码、交错执行、每格重启服务、来源信息戳进输出文件。

这种写法在 AI 工具圈里非常罕见。一个愿意在 README 里写”我在你最可能用的那台 Mac 上比对手慢 13-18%“的项目,它给出的其他数字可信度也高得多。

跑比内存还大的模型

这是很实际的一个场景:20-35B 级别的 MoE 塞不进 16GB 内存,硬塞会在任何东西报错之前先把机器拖进 swap。

内存侧用 -stream-weights:

goinfer-serve -stream-weights -weight-cache 6GiB -model ~/models/gpt-oss-20b-MXFP4.gguf

常驻内存被压在 -weight-cache 附近而不是模型大小,因为只有 token 实际路由到的专家才常驻。M1 Pro / 16GB 上跑 21GB 的 35B-A3B 实测:不加这个参数,5 秒内 swap 涨 7.8 GB;加了之后 RSS 峰值 8.95 GB 然后回落到 2.7 GB,零 swapout。

注意作者划的界限:这是 goinfer-serve 的活,不是 goinfer-chat 的。单次运行时设计上就是权重全常驻,没有 -stream-weights。模型比内存大,就用服务端。

显存侧的规则更硬:

在 cuda/metal 上,GPU 意味着完全常驻,没有中间状态。

两个后端都没有部分/分级 GPU 路径。一个建不起常驻 runner 的模型或架构,会直接降级到 CPU。稠密模型比你的卡大,这里没有部分 GPU 的故事——只有内存侧的 -stream-weights 或者 CPU。

但 MoE 有,那就是 -moe-cache-experts:非专家的核心常驻,token 实际路由到的专家按需从主机流进显存。在 RTX 2070 SUPER 8GB 上跑 gemma-4-26b-a4b(26B-A4B,128 专家 top-8):30 个缓存专家槽时 16.12 tok/s,瓶颈是 PCIe 主机→显存的带宽,不是 kernel 或 MoE 实现的问题。

一个模型无法违反的 Go struct

这个特性对做 Agent 的人价值很高:

type Person struct {
    Name string   `json:"name"`
    Age  int      `json:"age"`
    Tags []string `json:"tags"`
}

g, _ := constrain.GrammarFromStruct(Person{})       // struct → JSON Schema → 语法
sp.LogitProcessor = constrain.NewMasker(g, toks, eos).StopWhenComplete().Process

out := generate(sp)                                  // 受约束解码
var p Person
_ = json.Unmarshal(out, &p)                          // 形状有保证,数值没有

关键在于实现方式:约束是在 goinfer 增量字节级语法上的 logit mask——每一步会破坏 schema 的 token 被置为 −∞,所以非法 token 是不可达的,不是”重试到对为止”,是物理上生不出来。

这和”提示模型输出 JSON 然后 try/except 重试”是两个量级的可靠性。注意 README 的措辞很克制:形状(shape)有保证,数值(magnitude)没有——它保证你能 unmarshal 成功,不保证 Age 字段里的数字是对的。

支持的 schema 子集:对象(必需 + 可选、additionalProperties:false)、数组(items/minItems/maxItems)、string/number/integer/boolean/null、enum/const,任意嵌套。有一个基于属性的测试断言每次受约束生成都能通过其 schema 校验。

它跑什么

  • 27 个模型家族——Gemma 3/4、Qwen 2.5/3、Llama、Mistral、Mixtral、Phi-3、DeepSeek/MLA、GLM、Kimi、Granite、Nemotron、Mellum 等
  • 四种序列混合家族全覆盖——softmax·GQA、门控线性(DeltaNet)、状态空间(Mamba-2)、隐式 KV(MLA),加上稠密和稀疏 MoE
  • 加载器——GGUF、safetensors、GPTQ、AWQ,以及预量化的 .giw 包
  • 量化——f32、int8、int8int8、int4(W4A8),每个家族有 HuggingFace logit 对齐门禁
  • GPU——WebGPU 全平台,加上无 cgo 的 CUDA 和 Metal
  • 服务——OpenAI 兼容 + Anthropic Messages 端点,多模型、视觉、嵌入

量化那一条作者又诚实了一把:一次对齐测试能证明什么,取决于那台机器有哪些 fixture,缺 fixture 会静默跳过而不是失败。所以一次读作 28 ran / 20 skipped / 0 failed 的运行是通过。他要求引用的时候报数字,不要只说”绿了”。

它明确不做什么

「It is not a serving engine」

没有连续批处理、没有 paged attention,一次一个生成,后面挂一个有界队列。要用并发请求喂饱数据中心 GPU,那是 vLLM 的活。

goinfer 的目标是单用户本地推理:一个进程、一台机器、batch-1 解码、靠拷贝文件部署。

这个定位说得非常清楚,省了很多人的时间。

值不值得试

推荐给: Go 工程师、要把 LLM 嵌进自己程序的人、需要气隙/离线部署的人、需要结构化输出强保证的人、被 Python/CUDA 环境折磨够了的人。

不推荐给: 需要高并发服务的人(用 vLLM)、要榨干最后 15% 吞吐的人(Mac 上确实慢于 Ollama)、需要长上下文最优性能的人(深度上会被反超)。

状态提醒: Pre-1.0。前向传播/量化契约有对齐门禁且稳定,但加载器和架构描述符表面还在动。哪些接口会在 v1.0 被 semver 绑定已经定了(docs/api-tiers.md,2026-08-18 签署),但在 v1.0 tag 之前不生效。

顺带一提,这个项目还写了一本给 Go 工程师的推理入门书(十一章,在线可读),每章结尾落在这个仓库里的一个实测数字上。作者说如果只读一章,读第十一章——那章讲的是这个仓库里的测量曾经怎么出错。

一个把自己测错的历史写进文档并推荐你优先读的项目,我觉得可以给点信任。


© 2026 Author: Mycelium Protocol. 本文采用 CC BY 4.0 授权——欢迎转载和引用,须注明作者姓名及原文链接,不得去除署名后以原创发布。

🇬🇧 English

📌 Repository: https://github.com/townsendmerino/goinfer Docs (an inference primer for Go engineers): https://townsendmerino.github.io/goinfer/ License: MIT | Language: Go | Stars: 12 (2026-09-09) | Status: Pre-1.0

The Short Version

If Python dependencies, CUDA toolchains, or compiling llama.cpp have ever cost you an afternoon, goinfer is worth twenty minutes of your attention.

It compresses local inference into the most ordinary shape in the Go world: go install, out comes a static binary, copy it anywhere and it runs. Taken to the extreme, it will bake the model weights into the executable — a single 1.81 GB file that is a working 1.5B chat model, no download, no install, offline.

The Pain It Addresses: Deployment Friction

What actually drives people off local inference usually isn’t model quality. It’s not being able to install the thing.

  • Python environment conflicts, where one pip install drags in half an ecosystem
  • CUDA toolchain version mismatches that fail after forty minutes of compiling
  • llama.cpp wanting an architecture choice, CMake, and a C++ compiler
  • Move to another machine, do it all again

goinfer’s answer: none of that.

“It builds with no toolchain of any kind — no CUDA toolkit, no C++ compiler, no CMake, no Python — and cross-compiles like any other Go program.”

Pure Go with no cgo means cross-compilation behaves exactly like any other Go program. Handing a demo to a colleague, deploying to an air-gapped machine, distributing at a workshop — in those situations “one file” is worth far more than a few percent of throughput.

Two Ways In

Download a binary, install nothing:

# macOS arm64; swap the suffix for your platform
curl -fsSL -o goinfer-serve https://github.com/townsendmerino/goinfer/releases/latest/download/goinfer-serve-darwin-arm64
chmod +x goinfer-serve

Build from source, needs Go 1.27+:

go install github.com/townsendmerino/goinfer/cmd/serve@latest

There’s a trap the author documents clearly: that builds the CPU server. GPU means building the backend’s own entrypoint — -tags metal on cmd/serve does not work and fails the build saying so:

go install github.com/townsendmerino/goinfer/metal/cmd/serve@latest              # macOS
go install -tags cuda github.com/townsendmerino/goinfer/cuda/cmd/serve@latest    # Linux + NVIDIA

The release assets already carry this — Metal on macOS, CUDA on Linux. goinfer-serve --version prints which backends a given binary has.

Four Artifacts, and the Last One Is Unusual

Sizes are the darwin-arm64 assets of v0.16.0:

AssetSizeWhat it is
goinfer-serve-<os>-<arch>~16 MBthe server — OpenAI + Anthropic APIs, web UI, GPU built in
goinfer-chat-<os>-<arch>8.3 MBthe single-shot runtime; point it at your own GGUF
goinfer-chat-0.5b-<os>-<arch>652 MBruntime and model in one file
goinfer-chat-1.5b-<os>-<arch>1.81 GBsame, with the 1.5B coder model

The last two are “one file is the whole model.” And this isn’t limited to two blessed models — from a source checkout you can run the same pipeline for any supported checkpoint:

go run ./demo/chat pull bartowski/google_gemma-3-4b-it-GGUF:Q4_K_M -embed darwin/arm64 linux/amd64
# → demo/chat/dist/goinfer-chat-google_gemma-3-4b-it-{darwin-arm64,linux-amd64}

Out comes a static, cgo-free binary with the weights inside. The README is careful to note: the model’s license travels with the binary, and redistributing one makes that license your problem to satisfy.

Pulling Models Without Extra Tooling

The runtime fetches GGUFs from HuggingFace directly, no huggingface-cli needed:

./goinfer-chat-darwin-arm64 pull Qwen/Qwen2.5-Coder-1.5B-Instruct-GGUF          # see what a repo publishes
./goinfer-chat-darwin-arm64 pull Qwen/Qwen2.5-Coder-1.5B-Instruct-GGUF:q4_k_m   # fetch one quant
./goinfer-chat-darwin-arm64 pull demo:1.5b                                       # models goinfer itself vets and pins

Interrupted transfers resume; the sha256 is verified against what HuggingFace declares. goinfer hosts no weights — downloads come from HuggingFace.

You can skip the pull step entirely; --model takes the same reference and fetches on first use:

goinfer-serve -model hf:Qwen/Qwen2.5-Coder-1.5B-Instruct-GGUF:q4_k_m

Add -web for a local UI at http://127.0.0.1:8080 — chat, browse a HF repo, pull a checkpoint with live progress. The whole UI is one embedded HTML file with no external assets, so like everything else here it works offline.

The Benchmarks Are Why I Take This Project Seriously

Most inference projects pick a scenario they win and put a bar chart in the README. goinfer doesn’t.

Mac cold start (M1 Pro / 16GB, against Ollama 0.32.5 doing the same thing): from nothing to an answer, 25s vs 33s, from an 8MB binary with no daemon and nothing left running. The author immediately qualifies it: that leg is cold start only; steady-state decode is a separate measurement.

Mac steady-state decode (v0.17.1, Metal confirmed, Qwen2.5-Coder-1.5B q4_K_M, interleaved):

goinfer is 13-18% behind Ollama.

That number is printed as-is in the README, with a note that it replaces an earlier v0.16.0 reading, because review found that run was measuring a Mac binary with no Metal backend linked in — not the engine.

Linux + GPU: cold start 56.5s, dominated by a 1.71 GiB binary download at ~31.5 MB/s — which the author explicitly calls a function of your connection, not a fixed number. Steady-state CUDA decode, matched quant, interleaved, client-side tok/s: goinfer 192.8 tok/s vs Ollama 183.6 tok/s, ~5% ahead.

Then another qualification: this was a short completion at an effective depth of ~128, and the benchmark document’s deeper cells show Ollama pulling ahead as context grows.

And the line I like most:

“Measure it yourself rather than trust either number”

The harness, scripts/bench_peer.py, is committed: same weights both sides, decode-only, interleaved, server restarted per cell, provenance stamped into the output.

This is rare in the AI tooling world. A project willing to write “I’m 13-18% slower than my competitor on the machine you’re most likely using” in its own README earns a lot of credibility for every other number it publishes.

Running a Model Bigger Than Your RAM

A very practical scenario: a 20-35B-class MoE doesn’t fit in 16GB, and loading it anyway drives the machine into swap before anything reports a problem.

RAM side, -stream-weights:

goinfer-serve -stream-weights -weight-cache 6GiB -model ~/models/gpt-oss-20b-MXFP4.gguf

Resident memory is then capped near -weight-cache rather than the model size, because only the experts a token actually routes to stay resident. Measured on an M1 Pro / 16GB with a 21GB 35B-A3B: without the flag, +7.8 GB of swap in five seconds; with it, RSS peaked at 8.95 GB and fell back to 2.7 GB, with zero swapouts.

Note the boundary the author draws: this is goinfer-serve’s job, not goinfer-chat’s. The single-shot runtime holds all weights resident by design. If the model is bigger than your RAM, reach for the server.

VRAM side the rule is harder:

On cuda/metal, GPU means fully resident, full stop.

Neither backend has a partial or staged GPU path. A model or architecture that can’t build the resident runner declines straight to CPU. A dense model bigger than your card has no partial-GPU story here — only -stream-weights (RAM side) or the CPU.

A MoE does, via -moe-cache-experts: the non-expert core stays resident while a slot cache of routed experts streams host→VRAM per token. On an RTX 2070 SUPER 8GB running gemma-4-26b-a4b (26B-A4B, 128 experts top-8): 16.12 tok/s at 30 cached expert slots, capacity-bound on PCIe streaming rather than a kernel or MoE deficiency.

A Go Struct the Model Cannot Violate

High value if you’re building agents:

type Person struct {
    Name string   `json:"name"`
    Age  int      `json:"age"`
    Tags []string `json:"tags"`
}

g, _ := constrain.GrammarFromStruct(Person{})       // struct → JSON Schema → grammar
sp.LogitProcessor = constrain.NewMasker(g, toks, eos).StopWhenComplete().Process

out := generate(sp)                                  // constrained decode
var p Person
_ = json.Unmarshal(out, &p)                          // shape guaranteed, not magnitude

The mechanism matters: the constraint is a logit mask over an incremental byte-level grammar — at every step, tokens that would break the schema are set to −∞, so an invalid token is unreachable. Not retried until it works. Impossible.

That’s a different order of reliability from “prompt the model for JSON, then try/except and retry.” Note the careful wording: shape is guaranteed, magnitude is not — you’re promised the unmarshal succeeds, not that the number in Age is right.

Supported subset: objects (required + optional, additionalProperties:false), arrays (items/minItems/maxItems), string/number/integer/boolean/null, enum/const, and arbitrary nesting. A property-based test asserts every constrained generation validates against its schema.

What It Runs

  • 27 model families — Gemma 3/4, Qwen 2.5/3, Llama, Mistral, Mixtral, Phi-3, DeepSeek/MLA, GLM, Kimi, Granite, Nemotron, Mellum and more
  • All four sequence-mixing families — softmax·GQA, gated-linear (DeltaNet), state-space (Mamba-2), latent-KV (MLA), plus dense and sparse MoE
  • Loaders — GGUF, safetensors, GPTQ, AWQ, and prequantized .giw bundles
  • Quantization — f32, int8, int8int8, int4 (W4A8), with a HuggingFace logit-parity gate per family
  • GPU — WebGPU everywhere, plus cgo-free CUDA and Metal
  • Serving — OpenAI-compatible and Anthropic Messages endpoints, multi-model, vision, embeddings

On quantization the author is honest again: what a parity run proves is scoped to the fixtures that machine has, and a missing fixture skips silently rather than failing. A run reading 28 ran / 20 skipped / 0 failed is a pass. He asks you to quote a run’s counts, not the word “green.”

What It Explicitly Isn’t

“It is not a serving engine”

No continuous batching, no paged attention, one generation at a time behind a bounded queue. Saturating a datacentre GPU with concurrent requests is vLLM’s job.

goinfer targets single-user local inference: one process, one machine, batch-1 decode, deployed by copying a file.

Stating that this clearly saves a lot of people a lot of time.

Worth Trying?

Recommended for: Go engineers, anyone embedding an LLM into their own program, air-gapped or offline deployments, anyone needing hard structured-output guarantees, anyone who’s had enough of Python and CUDA environments.

Not for: high-concurrency serving (use vLLM), squeezing out the last 15% of throughput (it is genuinely slower than Ollama on Mac), or optimal long-context performance (it gets overtaken at depth).

Status caveat: Pre-1.0. The forward-pass and quantization contract is parity-gated and stable, but the loader and architecture-descriptor surface is still moving. Which surfaces v1.0 will semver-bind is already decided (docs/api-tiers.md, signed off 2026-08-18), but it doesn’t take effect until the v1.0 tag.

One more thing: the project ships an inference primer for Go engineers — eleven chapters, readable online, each ending in a measured number from this repo. The author says if you read one chapter, read chapter 11 — the one about how measurements in this tree have gone wrong.

A project that documents its own measurement mistakes and tells you to read that part first has earned some trust.


© 2026 Author: Mycelium Protocol. Licensed under CC BY 4.0 — free to share and adapt with attribution. You must credit the author and link to the original; removing attribution and republishing as original is not permitted.

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