idea实时写文件底层是什么技术？

Question

idea不需要我们经常按保存快捷键，我们在界面发动它会实时写到文件里，大家知道，我们写代码的时候键盘按得很快，可能一秒内会有多个字符输入改变，idea不会每按一次就整个文件写一次吧？

Answer 1

并不是实时的，只是感觉像是，实际上实在一些事件触发后，才会进行自动保存。

IntelliJ IDEA automatically saves changes that you make in your files. Saving is triggered by various events, such as compiling, running, debugging, performing version control operations, closing a file or a project, or quitting the IDE. Saving files can be also triggered by third-party plugins.
Most of the events that trigger auto-save are predefined and cannot be configured, but you can be sure that changes will not be lost and you can find all of them in local history.

• Write and edit source code | IntelliJ IDEA

在 File | Settings | Editor | General | Editor Tabs 下有一个 Mark modified (*) 的选项，当问及修改后，就会在标签上展示一个特别的图标，表示这个文件还没有被保存。