use tokio;

#[cfg(test)]
mod tests {
    use std::time::{Instant, Duration};
    use rust_decimal::prelude::ToPrimitive;
    use rust_decimal_macros::dec;

    #[test]
    // 计算十秒内能执行多少次decimal计算
    fn test_decimal_subtraction_performance() {
        // decimal使用的参考文档：https://docs.rs/rust_decimal/latest/rust_decimal/
        // 在AMD Ryzen 7 5800X 8-Core Processor下，Decimal平均每秒可以计算1200w次（28位小数）~1600w次（1位小数）
        let mut count = 0u64;
        let point_3 = dec!(0.3323289834012382184823981293);
        let point_2 = dec!(0.2518364912329136932183926421);
        let num = point_3 - point_2;
        let seconds = 10;

        let start = Instant::now();
        while start.elapsed() < Duration::from_secs(seconds) {
            let _ = point_3 - point_2;
            count += 1;
        }

        println!("Performed {} decimal subtractions in one second(avg), result is {:?}.", count / seconds, num.to_f64().unwrap());
    }
}