Meteor build very slow on branch as opposed to master


I’ve recently started using branches in git more extensively. That is, I used to just build on master, and use push/pull. But now have additional resources, so using branches much more, as opposed to doing everything on master.

The meter build cycles seem to be a lot slower. Does anyone know why? I’m using Ubuntu 16.4, node 7.0.0, with Meteor, and using Atom as my ide. Any ideas?

I’m a bit stumped as it is just a feeling working between master and branches, no idea how to measure this. Thanks so much.