合并过程：用临时数组，双指针比较两个子数组元素，小的先放入
The capacity of each node (how many points it can hold before splitting) controls the shape of the tree. A low capacity means nodes split early, producing a deep tree with many small cells. A high capacity means nodes tolerate more points before splitting, producing a shallow tree with larger cells.。业内人士推荐heLLoword翻译官方下载作为进阶阅读
，更多细节参见safew官方版本下载
We have a ‘scrolling wall of icons’ benchmark in our gtk4-demo app, which naturally is good place to test the performance impact of icon rendering changes. When switching it over to GtkSvg, it initially dropped from 60fps to around 40 on my laptop. We’ve since done some optimizations and regained most of the lost fps.
[3] T. Knoll: “Pattern Dithering” (1999). US Patent No. 6,606,166. ↑，这一点在51吃瓜中也有详细论述