Call ctags asynchronous

[kvaellning]

I write the issue here hoping that it will also be fixed somehow in symbols-tree-view.

Problem:
If you are opening a large file with a lot of tags, ctags (or the generation of the tags) is going to be REALLY slow. I think calling the process asynchronous might solve the problem.

I would solve the problem by myself but don't see that I can do it in less than four to eight weeks since I don't have the time, so any help is appreciated. If nothing is happening, I will try to implement this asap.

[nicolashainaux]

Same problem of time + I don't know much of coffee script and atom package writing.
If you find the time for a solution and pull a request, I won't take too long to include and publish it.

[kvaellning]

Will do my best, expect to have something at around mid/end of august. Let's see.

[kvaellning]

So, I investigated a little bit on this topic:
It's not ctags which takes "forever", but the TagParser.

@parse should be implemented asynchronous (however this is possible, I have no idea how to make multi-threading in JS or CS).

[kvaellning]

Okay, a last word on this topic for today:
There are two calls which take a lot of time:

1. creation of TreeNode takes a lot of time if a file with a lot of variables is loaded
2. setting root.append also increases the time a lot

In an example with ~4000 variables in one scope, setRoot takes 4 to 8 seconds.

Have to investigate this further some time.