Powerwalk
Go package for walking files and concurrently calling user code to handle each file. This package walks the file system in the same way filepath.Walk does, except instead of calling the walkFn inline, it uses goroutines to allow the files to be handled concurrently.
Powerwalk functions by walking concurrently over many files. In order to realize any benefits from this approach, you must tell the runtime to use multiple CPUs. For example:
runtime.GOMAXPROCS(runtime.NumCPU())
Usage
Powerwalk is a drop-in replacement for the filepath.Walk method (read about that for more details), and so has the same signature, even using the filepath.WalkFunc too.
powerwalk.Walk(root string, walkFn filepath.WalkFunc) error
By default, Powerwalk will call the walkFn for powerwalk.DefaultConcurrentWalks (currently 100) files at a time. To be specific about the number of concurrent files to walk, use the WalkLimit alternative.
powerwalk.WalkLimit(root string, walkFn filepath.WalkFunc, limit int) error
The WalkLimit function does the same as Walk, except allows you to specify the number of files to concurrently walk using the limit argument. The limit argument must be one or higher (i.e. >0). Specificying a limit that's too high, causes unnecessary overhead so sensible numbers are encouraged but not enforced.
See the godoc documentation for more information.