我是Rust的新手，在从函数返回Vec到main时面临着一个奇怪的性能问题。
给定这段代码，在发布编译模式下的运行时间是13 us。

fn main() -> Result<(), ()> {
    // ... Some code for loading data, ends up with:
    let series: ChunkedArray<Float32Type>

    let start = Instant::now();
    let percentiles = [0.0, 0.2, 0.4, 0.6, 0.8, 1.0];
    let mut result = Vec::<f32>::with_capacity(percentiles.len());
    for p in percentiles {
        match series.quantile(p as f64, QuantileInterpolOptions::Lower) {
            Ok(v) => result.push(v.unwrap()),
            _ => {}
        }
    }
    let duration = start.elapsed();
    println!("Time elapsed is: {:?}", duration);
    println!("{}",result");
    Ok(())
}

字符串
运行时间：44.484µs
这很酷，但是一旦我将逻辑提取到另一个函数中，所花费的时间就变成了大约72 ms（！）。请注意，我在percentile函数中添加了另一个时间度量，以确保其运行时仍然超级快。

fn main() -> Result<(), ()> {
    // ... Some code for loading data, ends up with:
    let series: ChunkedArray<Float32Type>

    let start = Instant::now();
    let percentiles = percentile(series);
    let duration = start.elapsed();
    println!("Time elapsed is: {:?}", duration);
    println!("{}",result)
    Ok(())
}

pub fn percentile(data: Series) -> Vec<f32> {
    let data = data;

    let start = Instant::now();
    let percentiles = [0.0, 0.2, 0.4, 0.6, 0.8, 1.0];
    let mut result = Vec::<f32>::with_capacity(percentiles.len());
    for p in percentiles {
        match data.quantile(p as f64, QuantileInterpolOptions::Lower) {
            Ok(v) => result.push(v.unwrap()),
            _ => {}
        }
    }
    let duration = start.elapsed();
    println!("internal time: {:?}", duration);

    result
}

型
这导致：
内部时间：13.796µs
运行时间：73.91404ms
在debug中运行此代码版本将导致大约600 ms
我超级困惑。为什么从函数中返回值似乎要花费这么多？我错过了什么？
edit：测量在代码的第一个和快速版本中删除series的成本，达到241µs。
编辑二：
这是完整的输出

mr@Ripper:~/git/me/distributor$ cargo run -r
   Compiling distributor v0.1.0 (/home/or/git/me/distributor)
    Finished release [optimized] target(s) in 3.03s
     Running `target/release/distributor`
[0.15219125, 0.977695, 0.9928536, 1.0046335, 1.0219395, 552.4709]
Time elapsed is: 44.484µs
mr@Ripper:~/git/me/distributor$ cargo run -r
   Compiling distributor v0.1.0 (/home/or/git/me/distributor)
    Finished release [optimized] target(s) in 2.76s
     Running `target/release/distributor`
internal time: 13.556µs
Time elapsed is: 73.22045ms
[0.15219125, 0.977695, 0.9928536, 1.0046335, 1.0219395, 552.4709

型