问题

考虑以下非常无害,非常简单的方法,它使用switch语句返回定义的枚举值:

public static MarketDataExchange GetMarketDataExchange(string ActivCode) {
    if (ActivCode == null) return MarketDataExchange.NONE;

    switch (ActivCode) {
        case "": return MarketDataExchange.NBBO;
        case "A": return MarketDataExchange.AMEX;
        case "B": return MarketDataExchange.BSE;
        case "BT": return MarketDataExchange.BATS;
        case "C": return MarketDataExchange.NSE;
        case "MW": return MarketDataExchange.CHX;
        case "N": return MarketDataExchange.NYSE;
        case "PA": return MarketDataExchange.ARCA;
        case "Q": return MarketDataExchange.NASDAQ;
        case "QD": return MarketDataExchange.NASDAQ_ADF;
        case "W": return MarketDataExchange.CBOE;
        case "X": return MarketDataExchange.PHLX;
        case "Y": return MarketDataExchange.DIRECTEDGE;
    }

    return MarketDataExchange.NONE;
}

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我和我的同事今天就如何更快地实现这个方法的几个想法进行了斗争,并且我们想出了一些有趣的修改,实际上相当显着地提高了它的性能(当然,按比例说).我有兴趣知道那里的其他人可以想到哪种优化可能没有发生在我们身上.

接下来,让我简单地提供一个快速免责声明:这是为了好玩 …

c# optimization switch-statement

Dan*_*Tao

2012 05-03

33
推荐指数

6
解决办法

4531
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