This is a potential optimization.

I remember we switched to node-glob a while back (I think in v0.6) and got a bit of a performance hit as a result (but with significant gains in correctness/consistency). We might consider switching to fast-glob or one of the related packages to see if we can get performance gains.

This should be an easy code change, and I can help run performance benchmarks. Also, feel free to take a peek at shelljs/benchmarks.