feat(rustproxy): use tikv-jemallocator as the global allocator to reduce glibc fragmentation and slow RSS growth; add allocator dependency and enable it in rustproxy, update lockfile, and run tsrust before tests

rust/Cargo.lock

@@ -936,6 +936,7 @@ dependencies = [
  "rustproxy-tls",
  "serde",
  "serde_json",
+ "tikv-jemallocator",
  "tokio",
  "tokio-rustls",
  "tokio-util",
@@ -1298,6 +1299,26 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "tikv-jemalloc-sys"
+version = "0.6.1+5.3.0-1-ge13ca993e8ccb9ba9847cc330696e02839f328f7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd8aa5b2ab86a2cefa406d889139c162cbb230092f7d1d7cbc1716405d852a3b"
+dependencies = [
+ "cc",
+ "libc",
+]
+
+[[package]]
+name = "tikv-jemallocator"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0359b4327f954e0567e69fb191cf1436617748813819c94b8cd4a431422d053a"
+dependencies = [
+ "libc",
+ "tikv-jemalloc-sys",
+]
+
 [[package]]
 name = "time"
 version = "0.3.47"

rust/Cargo.toml

@@ -91,6 +91,9 @@ libc = "0.2"
 # Socket-level options (keepalive, etc.)
 socket2 = { version = "0.5", features = ["all"] }
 
+# jemalloc allocator (prevents glibc fragmentation / slow RSS growth)
+tikv-jemallocator = "0.6"
+
 # Internal crates
 rustproxy-config = { path = "crates/rustproxy-config" }
 rustproxy-routing = { path = "crates/rustproxy-routing" }

rust/crates/rustproxy/Cargo.toml

@@ -39,6 +39,7 @@ hyper = { workspace = true }
 hyper-util = { workspace = true }
 http-body-util = { workspace = true }
 bytes = { workspace = true }
+tikv-jemallocator = { workspace = true }
 
 [dev-dependencies]
 rcgen = { workspace = true }

rust/crates/rustproxy/src/main.rs

@@ -1,3 +1,6 @@
+#[global_allocator]
+static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
+
 use clap::Parser;
 use tracing_subscriber::EnvFilter;
 use anyhow::Result;