Add dhat and rayon

- Set up dhat, when dhat-heap feature, the dhap memory profiler will run. Due to this tokio needs to be manually built.
- Rayon now explicitly built outside of tokio runtime.

Cargo.lock

@@ -287,6 +287,22 @@ dependencies = [
  "powerfmt",
 ]
 
+[[package]]
+name = "dhat"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98cd11d84628e233de0ce467de10b8633f4ddaecafadefc86e13b84b8739b827"
+dependencies = [
+ "backtrace",
+ "lazy_static",
+ "mintex",
+ "parking_lot",
+ "rustc-hash",
+ "serde",
+ "serde_json",
+ "thousands",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -785,6 +801,16 @@ version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78b3ae25bc7c8c38cec158d1f2757ee79e9b3740fbc7ccf0e59e4b08d793fa89"
 
+[[package]]
+name = "lock_api"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07af8b9cdd281b7915f413fa73f29ebd5d55d0d3f0155584dade1ff18cea1b17"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.22"
@@ -829,6 +855,12 @@ dependencies = [
  "simd-adler32",
 ]
 
+[[package]]
+name = "mintex"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9bec4598fddb13cc7b528819e697852653252b760f1228b7642679bf2ff2cd07"
+
 [[package]]
 name = "mio"
 version = "1.0.1"
@@ -1011,6 +1043,29 @@ dependencies = [
  "vcpkg",
 ]
 
+[[package]]
+name = "parking_lot"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bf18183cf54e8d6059647fc3063646a1801cf30896933ec2311622cc4b9a27"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-targets 0.52.6",
+]
+
 [[package]]
 name = "pem-rfc7468"
 version = "0.7.0"
@@ -1129,6 +1184,7 @@ dependencies = [
  "base64",
  "bytes",
  "crossbeam-channel",
+ "dhat",
  "digest 0.11.0-pre.9",
  "image",
  "log",
@@ -1143,6 +1199,7 @@ dependencies = [
  "pumpkin-text",
  "pumpkin-world",
  "rand",
+ "rayon",
  "reqwest",
  "rsa",
  "rsa-der",
@@ -1300,6 +1357,15 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a908a6e00f1fdd0dfd9c0eb08ce85126f6d8bbda50017e74bc4a4b7d4a926a4"
+dependencies = [
+ "bitflags 2.6.0",
+]
+
 [[package]]
 name = "reqwest"
 version = "0.12.5"
@@ -1393,6 +1459,12 @@ version = "0.1.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f"
 
+[[package]]
+name = "rustc-hash"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
+
 [[package]]
 name = "rustix"
 version = "0.38.34"
@@ -1461,6 +1533,12 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+
 [[package]]
 name = "security-framework"
 version = "2.11.1"
@@ -1721,6 +1799,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "thousands"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bf63baf9f5039dadc247375c29eb13706706cfde997d0330d05aa63a77d8820"
+
 [[package]]
 name = "time"
 version = "0.3.36"

Cargo.toml

@@ -7,9 +7,10 @@ version = "0.1.0"
 edition = "2021"
 
 [profile.release]
-strip = true
+debug = 1
 lto = true
 codegen-units = 1
 
 [workspace.dependencies]
 tokio = { version = "1.39.2", features = ["net", "macros", "rt-multi-thread", "fs", "io-util"] }
+rayon = "1.10.0"

pumpkin/Cargo.toml

@@ -4,7 +4,15 @@ version = "0.1.0-dev"
 description = "Empowering everyone to host fast and efficient Minecraft servers."
 edition = "2021"
 
+[features]
+default = []
+dhat-heap = ["dhat"]
+
 [dependencies]
+# memory analysis
+dhat = { version = "0.3.3", optional = true }
+
+# pumpkin
 pumpkin-text = { path = "../pumpkin-text" }
 pumpkin-inventory = { path = "../pumpkin-inventory"}
 pumpkin-world = { path = "../pumpkin-world"}
@@ -52,3 +60,4 @@ crossbeam-channel = "0.5.13"
 uuid = { version = "1.10", features = ["serde", "v3"]}
 
 tokio.workspace = true
+rayon.workspace = true

pumpkin/src/main.rs

@@ -22,9 +22,23 @@ pub mod rcon;
 pub mod server;
 pub mod util;
 
+#[cfg(feature = "dhat-heap")]
+#[global_allocator]
+static ALLOC: dhat::Alloc = dhat::Alloc;
+
 #[cfg(not(target_os = "wasi"))]
-#[tokio::main]
-async fn main() -> io::Result<()> {
+fn main() -> io::Result<()> {
+    #[cfg(feature = "dhat-heap")]
+    let _profiler = dhat::Profiler::new_heap();
+    #[cfg(feature = "dhat-heap")]
+    println!("Using a memory profiler");
+    let rt = tokio::runtime::Builder::new_multi_thread()
+        .enable_all()
+        .build()
+        .unwrap();
+    // ensure rayon is built outside of tokio scope
+    rayon::ThreadPoolBuilder::new().build_global().unwrap();
+    rt.block_on(async {
         const SERVER: Token = Token(0);
         use std::{cell::RefCell, time::Instant};
 
@@ -157,6 +171,7 @@ async fn main() -> io::Result<()> {
                 }
             }
         }
+    })
 }
 
 fn next(current: &mut Token) -> Token {