rust/src/test/bench/task-perf-vector-party.rs

// Vectors are allocated in the Rust kernel's memory region, use of
// which requires some amount of synchronization. This test exercises
// that synchronization by spawning a number of tasks and then
// allocating and freeing vectors.

fn f(&&n: uint) {
    uint::range(0u, n) {|i|
        let v: [u8] = [];
        vec::reserve(v, 1000u);
    }
}

fn main(args: [str]) {
    let n = if vec::len(args) < 2u { 100u }
            else { option::get(uint::from_str(args[1])) };
    uint::range(0u, 100u) {|i| task::spawn {|| f(n); };}
}