The data in the table is the ratio of runtime of the synchronized version to the unsynchronized version; it shows the performance penalty of synchronization.
表格中的数据是同步版本的运行时间相对于非同步版本的运行时间的比率；它显示了同步的性能损失。
2
This date is used to version the process at runtime.
此日期用于在运行时对流程进行版本管理。
3
This suggests that it is safer to clean the build outputs first so you know you are using the run-timeversion of the current source.