perf(server): 用 mimalloc 替换系统全局分配器

多线程高频小对象分配场景下,mimalloc 吞吐显著优于系统 malloc,且对全静态
musl 链接友好(生产 Docker 镜像即 musl 目标)。选 mimalloc 而非 jemalloc:
本项目生产 server 是全静态 musl 二进制,jemalloc 在 musl 上有 pthread_getname_np
(musl<1.2.3)/unprefixed-malloc 符号冲突的已知坑。

cfg 双门控(与项目双目标编译约定一致):
- feature=server:分配器只服务端二进制需要
- not(wasm32):mimalloc_rust 在 wasm32 上无法编译(Issue #76),前端走默认分配器

mimalloc 声明为 optional + 经 server feature 启用,与 argon2/uuid 等 server-only
依赖同栏位。验证:server native + WASM 双目标编译通过 + clippy 零告警。
musl 目标受本机无 musl-gcc 限制,需 Docker 内构建验证(同 zenwebp 等任何 C 依赖)。

AGENTS.md

@@ -129,6 +129,8 @@ Dioxus 0.7 fullstack project with **two independent gates** — the most common
 
 **Shared types that compile on both targets**: bridges like `src/tiptap_bridge.rs` and `src/codemirror_bridge.rs` keep shared structs (e.g. `UploadsInFlight`, `SqlSchema`/`SqlTable`) outside cfg gates, while wasm-bindgen externs + `EditorHandle` live in inner `#[cfg(target_arch = "wasm32")] mod wasm`. Similarly `src/sysinfo_sampler.rs` exposes `SystemSnapshot` on both targets but gates the actual sampler + `RwLock` behind `server`.
 
+**Global allocator (mimalloc)**: `src/main.rs` registers `#[global_allocator] static GLOBAL: mimalloc::MiMalloc` gated with `#[cfg(all(feature = "server", not(target_arch = "wasm32")))]`. Both gates are load-bearing: `mimalloc` is `optional = true` enabled via the `server` feature, and the `mimalloc_rust` crate does not compile on `wasm32` (Issue #76), so the WASM frontend must fall back to the default allocator. Do not delete either cfg — removing the `not(wasm32)` gate breaks the frontend bundle, removing the `server` gate pulls mimalloc into the WASM target. Chosen over jemalloc because the production server is a fully-static musl binary (Dockerfile), and jemalloc has known musl build pitfalls (`pthread_getname_np` for musl <1.2.3, `unprefixed-malloc` symbol conflicts); mimalloc links cleanly into musl/glibc/FreeBSD.
+
 ## Dual API Architecture
 
 The server exposes two distinct API patterns:

Cargo.lock

@@ -2644,6 +2644,15 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
 
+[[package]]
+name = "libmimalloc-sys"
+version = "0.1.49"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a45a52f43e1c16f667ccfe4dd8c85b7f7c204fd5e3bf46c5b0db9a5c3c0b8e9"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "libredox"
 version = "0.1.18"
@@ -2868,6 +2877,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "mimalloc"
+version = "0.1.52"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d4139bb28d14ad1facf21d5eb8825051b326e172d216b39f6d31df53cc97862"
+dependencies = [
+ "libmimalloc-sys",
+]
+
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -5496,6 +5514,7 @@ dependencies = [
  "js-sys",
  "lol_html",
  "md-5 0.10.6",
+ "mimalloc",
  "moka",
  "pinyin",
  "pulldown-cmark",

Cargo.toml

@@ -54,6 +54,10 @@ bollard = { version = "0.21", optional = true }
 # 把 mpsc::Receiver 包成 Stream,供 axum SSE handler 使用。
 # axum::response::sse::{Sse,KeepAlive,Event} 随 axum 0.8 自带,无需额外 dep。
 tokio-stream = { version = "0.1", features = ["sync"], optional = true }
+# 全局分配器：用 mimalloc 替换系统 malloc。多线程高频小对象分配吞吐显著提升，
+# 且对全静态 musl 链接友好（生产 Docker 镜像即 musl 目标）。
+# server-only：经 server feature 启用；WASM 前端构建不编译（见 main.rs cfg 门控）。
+mimalloc = { version = "0.1", optional = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 web-sys = { version = "0.3", features = ["Document", "Window", "Storage", "Element", "HtmlElement", "DomTokenList", "MediaQueryList", "HtmlImageElement", "MouseEvent", "KeyboardEvent", "Node", "EventTarget", "Navigator", "File", "FileList", "FormData", "Request", "RequestInit", "Response", "Headers", "ClipboardEvent", "DataTransfer", "HtmlInputElement", "EventSource", "MessageEvent"] }
@@ -114,4 +118,5 @@ server = [
     "dep:bytes",
     "dep:bollard",
     "dep:tokio-stream",
+    "dep:mimalloc",
 ]

src/main.rs

@@ -9,6 +9,16 @@
 //! 当未启用 `server` feature（例如编译为 WASM 前端）时，
 //! 仅调用 `dioxus::launch` 启动客户端应用。
 
+// 全局内存分配器：mimalloc。
+// 多线程高频小对象分配场景下吞吐显著优于系统 malloc，且对全静态 musl 链接友好。
+// cfg 门控（与项目「双目标编译」约定一致）：
+//   - feature = "server"：分配器只服务端二进制需要。
+//   - not(wasm32)：mimalloc_rust 在 wasm32 上无法编译（mimalloc_rust Issue #76），
+//     WASM 前端走默认分配器。两个门控同时满足才注册。
+#[cfg(all(feature = "server", not(target_arch = "wasm32")))]
+#[global_allocator]
+static GLOBAL: mimalloc::MiMalloc = mimalloc::MiMalloc;
+
 // 业务模块
 mod api;
 mod auth;