bytes-pool

A pre-allocated buffer pool for Rust.

Overview

bytes-pool provides a fixed-size pool of pre-allocated buffers. Buffers are allocated from the pool and automatically returned when dropped. This is useful for high-performance applications where allocation overhead matters.

Features

• Thread-safe pool access
• Zero-allocation buffer recycling
• Implements BufMut for ergonomic writes
• Automatic buffer return on drop

Usage

Add this to your Cargo.toml:

[dependencies]
bytes-pool = "0.1"

Example

use bytes::BufMut;
use bytes_pool::Pool;

// Create a pool with 10 buffers of 1024 bytes each
let pool = Pool::new(1024, 10);

// Allocate a buffer
let mut buf = pool.alloc().unwrap();

// Write data using BufMut
buf.put_slice(b"hello world");

// Access the data
assert_eq!(&buf[..], b"hello world");

// Buffer is automatically returned to the pool when dropped
drop(buf);
assert_eq!(pool.available(), 10);

Pool Exhaustion

When all buffers are in use, alloc() returns an error:

use bytes_pool::Pool;

let pool = Pool::new(1024, 1);

let buf1 = pool.alloc().unwrap();
let result = pool.alloc(); // Returns Err(AllocError)

assert!(result.is_err());

Requirements

• Buffer size must be a power of 2
• Buffer count must be greater than 0

License

This project is licensed under the MIT License - see the LICENSE file for details.