When is flush called on a thread in node.js?

Question

Node.js

As you know, a callback for flush can be passed to the node.js thread . I noticed that flush is not always called. For example, if using transform to remove all data from the stream, then it is called, otherwise it is not. It's all kind of hazy. Can someone explain how it works?

Answer 1

this._flush()called during 'prefinish' event: https://github.com/iojs/io.js/blob/40ffed8f3f4392d...
'prefinish' called during stream.end(): https://github.com/iojs/io.js/blob /40ffed8f3f4392d...