diff --git a/Cargo.lock b/Cargo.lock
index 2e4661a..e5618ff 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1177,6 +1177,7 @@ dependencies = [
  "axum",
  "cursor-server",
  "libc",
+ "mimalloc",
  "rfd",
  "serde",
  "serde_json",
@@ -3417,6 +3418,15 @@ 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 = "0.1.19"
@@ -3604,6 +3614,15 @@ dependencies = [
  "autocfg",
 ]
 
+[[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"
diff --git a/apps/desktop/src-tauri/Cargo.toml b/apps/desktop/src-tauri/Cargo.toml
index 10c01dd..44fd06a 100644
--- a/apps/desktop/src-tauri/Cargo.toml
+++ b/apps/desktop/src-tauri/Cargo.toml
@@ -15,6 +15,7 @@ tauri-build = { version = "2", features = [] }
 axum = "0.8"
 cursor-server = { path = "../../../server" }
 libc = "0.2"
+mimalloc = "0.1"
 rfd = "0.15"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
diff --git a/apps/desktop/src-tauri/src/lib.rs b/apps/desktop/src-tauri/src/lib.rs
index cef6375..1bbe442 100644
--- a/apps/desktop/src-tauri/src/lib.rs
+++ b/apps/desktop/src-tauri/src/lib.rs
@@ -6,6 +6,11 @@ mod startup;
 mod tray;
 mod update;
 
+// mimalloc 在释放时主动向操作系统归还内存,避免 glibc 保留页导致
+// 关闭窗口后 RSS 无法回落到静默启动水平。
+#[global_allocator]
+static GLOBAL_ALLOCATOR: mimalloc::MiMalloc = mimalloc::MiMalloc;
+
 pub fn run() -> std::process::ExitCode {
     if let Some(exit_code) = update::run_replacement_if_requested() {
         return exit_code;