Optimize listNew()

[Andrei-Stepanov]

Hello,

how do you think is it possible to optimize code:

file-queue/lib/maildir.js

Line 90 in 6f2bfa6

Maildir.prototype.listNew = function(callback) {

Maildir.prototype.listNew = function(callback) {
  this.fs.readdir(this.dirPaths[NEW], callback);
};

the point is for each pop operation it reads all content of the directory.

pop()->readdir()
pop()->readdir()
pop()->readdir()

In the sequence code

file-queue/queue.js

Line 76 in 6f2bfa6

Queue.prototype.tryPop = function(messages, callback) {

at tryPop you use only 1 item from the array.

If the queue has size 1^e6 messages it .....

How about to optimize this place?
For example

• add memoize
  or
• consume result from listNew() until it has elements?
  Thank you.