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I just did a very quick tests with multithreaded allocation and deallocation. In this the dev3 branch does not perform very well. My CPU is 13th Gen Intel(R) Core(TM) i7-13850HX. The test code is in Rust, I hope this is ok:
# Cargo.toml
[package]
name = "experiment"
edition = "2021"
[dependencies]
rand = "0.9.1"// main.rs
use rand::{rngs::ThreadRng, Rng};
use std::{hint::black_box, thread, time::Instant};
fn main() {
let start = Instant::now();
thread::scope(|scope| {
for _ in 0..100 {
scope.spawn(|| {
let mut rnd = ThreadRng::default();
for _ in 0..1000000 {
let allocation = vec![0u8; rnd.random_range(1..1000)];
black_box(&allocation);
if rnd.random_bool(0.24) {
allocation.leak();
}
}
});
}
});
let duration = start.elapsed();
println!("took {}", duration.as_secs_f32());
}My results are (built in --release mode):
❯ LD_PRELOAD=/usr/lib/libjemalloc.so.2 ./experiment
took 0.6000622
❯ LD_PRELOAD=/home/abc/temp/mimalloc/build/libmimalloc.so.1.9 ./experiment
took 0.63197255
❯ LD_PRELOAD=/home/abc/temp/mimalloc/build/libmimalloc.so.2.2 ./experiment
took 0.62372595
❯ LD_PRELOAD=/home/abc/temp/mimalloc/build/libmimalloc.so.3.1 ./experiment
took 4.9627113
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