Writing a view count with w3 total cache

Question

I am trying to develop functionality which counts how many times a post is viewed however I am also using page caching (APC possible memcache in the future) via w3 total cache.

The "view count" value is not to be shown to anyone but administrators/editors and only when editing the post in admin section.

So my question is if I do the following for every post

update_post_meta($postID, 'view_count', $count++);

is it going to

• work considering im using page caching?

• if it does work, would it slow down the request considerably?

• if it does slow down the request would doing a asynchronous mysql update via MYSQLI_ASYNC speed this back up?

Thanks