Use FS inotify instead of polling

[er1z]

Do you mind introducing FS watching based on inotify? It'll decrease CPU usage significantly.

[COil]

Hi @er1z,

Well, I am open to all suggestions. Are you familiar with inotify and how it could be implemented in this project?

[er1z]

I'm completely not into golang but found this module: https://github.com/fsnotify/fsnotify

Currently, you poll the specified paths every N milliseconds. Using the library above, you could completely give up on that option (sleep) because an event is being raised whenever anything is being changed under specified directory. Then, you can compare the path of changed file against paths collection and if it exists — fire cache warmup.

Our CPUs will scream „thanks” because checking all files every time will be irrelevant.

edit: https://godoc.org/github.com/rjeczalik/notify this one looks like a more mature.