add dhat heap profile (#622)

Cargo.toml

@@ -18,6 +18,7 @@ opt-level = "s"
 codegen-units = 1
 lto = true
 strip = true
+debug = 1
 
 [patch.crates-io]
 tokio-rustls = { git = "https://github.com/Watfaq/tokio-rustls.git", rev = "6b9af8ac7bb5abc159d9a67e9ddbf84127559a4a"}

clash/Cargo.toml

@@ -12,7 +12,11 @@ tracing = ["clash_lib/tracing"]
 bench = ["clash_lib/bench"]
 onion = ["clash_lib/onion"]
 
+dhat-heap = ["dep:dhat"]
+
 [dependencies]
 clap = { version = "4.5.19", features = ["derive"] }
 
-clash_lib = { path = "../clash_lib", version = "*", default-features = false }
+clash_lib = { path = "../clash_lib", version = "*", default-features = false }
+
+dhat = { version = "0.3.3", optional = true }

clash/src/main.rs

@@ -1,3 +1,7 @@
+#[cfg(feature = "dhat-heap")]
+#[global_allocator]
+static ALLOC: dhat::Alloc = dhat::Alloc;
+
 extern crate clash_lib as clash;
 
 use clap::Parser;
@@ -45,6 +49,9 @@ struct Cli {
 }
 
 fn main() {
+    #[cfg(feature = "dhat-heap")]
+    let _profiler = dhat::Profiler::new_heap();
+
     let cli = Cli::parse();
 
     if cli.version {
@@ -81,6 +88,7 @@ fn main() {
             }
         }
     }
+
     match clash::start(clash::Options {
         config: clash::Config::File(file),
         cwd: cli.directory.map(|x| x.to_string_lossy().to_string()),