A Compound Index Eliminates Expensive Row Lookups
Unlike the LHC, which loops particles around a massive ring to build up energy before smashing them together, linear accelerators like CLEAR send particles along a straight, one-time path. That setup allows for greater precision and compactness, making it ideal for applications like FLASH.
，这一点在新收录的资料中也有详细论述
ITmedia�̓A�C�e�B���f�B�A�������Ђ̓o�^���W�ł��B
The runtime executes sumTree(tree.left). When doing so, it remembers its place in the original sumTree invocation, so it can come back to it and finish it later.