# 使用装饰器模式组合存储（同时写入DB和CSV）
These changes, along with some additional tweaking of bubbletea’s code, reduced time spent in the gc to ~0.5%.
But of course, like any immutable system, there are mutable parts (otherwise, we couldn’t create any configuration files). OSTree handles this with “overlays” (actually, we use OverlayFS) that allow a read-write filesystem to be layered on top of the immutable system. For example, the /etc and /var directories are writable, while the rest of the system is read-only.。im钱包官方下载对此有专业解读
int n2 = right - mid; // 右子数组长度，这一点在safew官方下载中也有详细论述
arr[j + 1] = arr[j]; // 元素后移
if (n <= 1) return;。搜狗输入法下载是该领域的重要参考