From 798c1ad0f1de80ff0e7196b6140a3f74e31fe111 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bartek=20Iwa=C5=84czuk?= <biwanczuk@gmail.com>
Date: Wed, 3 May 2023 00:36:33 +0200
Subject: perf: use jemalloc as global allocator (#18957)

Follow up to https://github.com/denoland/deno/pull/18875 that enables
`jemalloc` as a global allocator for the Deno CLI.
---
 cli/Cargo.toml    | 3 +++
 cli/main.rs       | 7 +++++++
 cli/napi/async.rs | 3 ++-
 3 files changed, 12 insertions(+), 1 deletion(-)

(limited to 'cli')

diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 319c8cb56..63842a6a3 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -120,6 +120,9 @@ winapi = { workspace = true, features = ["knownfolders", "mswsock", "objbase", "
 [target.'cfg(unix)'.dependencies]
 nix.workspace = true
 
+[target.'cfg(not(target_env = "msvc"))'.dependencies]
+tikv-jemallocator.workspace = true
+
 [dev-dependencies]
 deno_bench_util.workspace = true
 dotenv = "=0.15.0"
diff --git a/cli/main.rs b/cli/main.rs
index 85942cbd8..c3421b0cd 100644
--- a/cli/main.rs
+++ b/cli/main.rs
@@ -26,6 +26,13 @@ mod version;
 mod watcher;
 mod worker;
 
+#[cfg(not(target_env = "msvc"))]
+use tikv_jemallocator::Jemalloc;
+
+#[cfg(not(target_env = "msvc"))]
+#[global_allocator]
+static GLOBAL: Jemalloc = Jemalloc;
+
 use crate::args::flags_from_vec;
 use crate::args::DenoSubcommand;
 use crate::args::Flags;
diff --git a/cli/napi/async.rs b/cli/napi/async.rs
index 8cbdb2220..e6695551a 100644
--- a/cli/napi/async.rs
+++ b/cli/napi/async.rs
@@ -24,7 +24,8 @@ fn napi_create_async_work(
     execute,
     complete,
   };
-  *result = transmute::<Box<AsyncWork>, _>(Box::new(work));
+  let work_box = Box::new(work);
+  *result = transmute::<*mut AsyncWork, _>(Box::into_raw(work_box));
   Ok(())
 }
 
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