如何用简单的英语解释回调？它们与从调用函数中获取某些上下文的另一个函数调用一个函数有什么不同？如何向新手程序员解释他们的权力？
I am working on an application which needs to test 1000's of proxy servers continuously. The application is based around Spring Boot.
The current approach I am using is @Async decorated method which takes a proxy server and returns the result.
I am often getting OutOfMemory error and the processing is very slow. I assume that is because each async method is executed in a separate thread which blocks on I/O?
Everywhere I read about async in Java, people mix …