From 3052bf20a22ee3d45b8fab515e7814fdfeb16635 Mon Sep 17 00:00:00 2001
From: clux <sszynrae@gmail.com>
Date: Sun, 19 May 2024 16:50:39 +0100
Subject: [PATCH] Add hints about changing allocators

references #142 and does it in one example

Signed-off-by: clux <sszynrae@gmail.com>
---
 README.md                   | 13 +++++++++++++
 test/serdecrate/Cargo.toml  |  2 ++
 test/serdecrate/src/main.rs |  9 +++++----
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index d98b67b..c6da6d8 100644
--- a/README.md
+++ b/README.md
@@ -123,6 +123,19 @@ CircleCI supports both methods:
 - [Circle: direct folder cache (manual docker build)](https://github.com/clux/webapp-rs/blob/master/.circleci/config.yml)
 - Circle also supports [docker layer caching](https://circleci.com/docs/2.0/docker-layer-caching/) (no example atm)
 
+## Allocator Performance
+
+To optimise memory performance (see [#142](https://github.com/clux/muslrust/issues/142)) consider changing the global allocators in sensitive applications:
+
+- [jemalloc](https://github.com/tikv/jemallocator)
+- [mimalloc](https://github.com/microsoft/mimalloc)
+
+```rust
+use tikv_jemallocator::Jemalloc;
+#[global_allocator]
+static GLOBAL: Jemalloc = Jemalloc;
+```
+
 ## Troubleshooting
 
 ### SSL Verification
diff --git a/test/serdecrate/Cargo.toml b/test/serdecrate/Cargo.toml
index 0b56f19..e98b8e9 100644
--- a/test/serdecrate/Cargo.toml
+++ b/test/serdecrate/Cargo.toml
@@ -2,8 +2,10 @@
 authors = ["clux <sszynrae@gmail.com>"]
 name = "serdecrate"
 version = "0.1.0"
+edition = "2021"
 
 [dependencies]
 serde = "1.0.15"
 serde_derive = "1.0.15"
 serde_json = "1.0.4"
+tikv-jemallocator = "0.5.4"
diff --git a/test/serdecrate/src/main.rs b/test/serdecrate/src/main.rs
index 3ce6b2e..527175d 100644
--- a/test/serdecrate/src/main.rs
+++ b/test/serdecrate/src/main.rs
@@ -1,8 +1,9 @@
-#[macro_use]
-extern crate serde_derive;
+use serde_derive::{Deserialize, Serialize};
+use serde_json;
 
-extern crate serde;
-extern crate serde_json;
+use tikv_jemallocator::Jemalloc;
+#[global_allocator]
+static GLOBAL: Jemalloc = Jemalloc;
 
 #[derive(Serialize, Deserialize, Debug)]
 struct Point {