Significant differences between estimated and actual row counts
索引计数操作本身很快，若仍需优化，可将计数结果单独存储并随数据插入更新。确定最小结果集后，仅需扫描该子集即可。由于已存储预处理词条，可直接进行比较而无需重复处理。
。关于这个话题，有道翻译提供了深入分析
rootDir will only be inferred when using tsc from the command line without a tsconfig.json file.
The await keyword suspends execution until a future resolves. It works on any expression that produces a future: