Function (4) gets the result row as a PHP object.
函数(4)以php对象的形式返回结果行。
Function (3) gets the result row as a PHP associative array.
函数(3)以PHP关联数组的形式返回结果行。
Reducing the total runtime means that the user gets the result sooner - even if it takes more total CPU cycles to do the work in parallel than it does sequentially.
减少总体运行时间意味着用户能更快得到结果—即使并行执行需要比顺序执行更多的CPU周期。
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