Lua - If和and，什么更快？ [英] Lua - If and and, what is faster?

问题描述

当我和lua检查两个条件时，哪个方式的运行时间更快？

When I check two conditions with and in lua, which way is faster in running time?

if bool and somefuntion() then
    do stuff
end

或

if bool then
    if somefuntion() then
        do stuff
    end
end

？

推荐答案

在两个片段上运行 luac -l -p ，您将看到它们生成完全相同的字节码。所以写一些更清楚的东西。

Run luac -l -p on both fragments and you'll see that they generate exactly the same bytecode. So write whatever is clearer for you.

它们相同的原因是Lua对和以及使用短路评估或者，如OllieB所述。

The reason they are the same is that Lua uses short-circuit evaluation for and and or, as mentioned by OllieB.

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