More stats information in output

[mrexox]

There is a suggestion to add more information to lefthook output. For example

• Execution time of every command/script in a hook
• A note which command/script took too much time to execute

You might want to suggest some more things to consider. Welcome!

[mrexox]

@abitrolly, would you like to add something else?

[abitrolly]

Memory usage and disk I/O to figure out if there is an I/O bottleneck. I remember Linux has some abstractions like load, but I don't remember how to read it.