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Remove obsolete Jemalloc #70

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Remove obsolete Jemalloc #70

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25 changes: 0 additions & 25 deletions README.md
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Expand Up @@ -89,31 +89,6 @@ Enable LTO in `Cargo.toml`:
lto = true
```

# Remove Jemalloc

![Minimum Rust: 1.28](https://img.shields.io/badge/Minimum%20Rust%20Version-1.28-brightgreen.svg)
![Maximum Rust: 1.31](https://img.shields.io/badge/Maximum%20Rust%20Version-1.31-brightgreen.svg)

> [!IMPORTANT]
> As of Rust 1.32,
> [`jemalloc` is removed by default](https://blog.rust-lang.org/2019/01/17/Rust-1.32.0.html).
> **If using Rust 1.32 or newer, no action is needed to reduce binary size regarding this
> feature**.

**Prior to Rust 1.32**, to improve performance on some platforms Rust bundled
[jemalloc](https://github.com/jemalloc/jemalloc), an allocator that often
outperforms the default system allocator. Bundling jemalloc added around 200KB
to the resulting binary, however.

To remove `jemalloc` on Rust 1.28 - Rust 1.31, add this code to the top of `main.rs`:

```rust
use std::alloc::System;

#[global_allocator]
static A: System = System;
```

# Reduce Parallel Code Generation Units to Increase Optimization

[By default][cargo-profile], Cargo specifies 16 parallel codegen units for release builds.
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