PHP const数组性能

Question

使用const数组与静态成员数组是否有任何性能/内存增益/损失？

我的意思是

private static $ACTIVITY_TO_CLASS_MAPPING = [
     CfgActivityFeed::ACTIVITY_FEED_TYPE_INDIVIDUAL => IndividualFeedActivity::class,
     ...
];

对战

const ACTIVITY_TO_CLASS_MAPPING = [
    CfgActivityFeed::ACTIVITY_FEED_TYPE_INDIVIDUAL => IndividualFeedActivity::class,
    ...
];