Adding the Linux Kernel as project takes more than an hour to complete

[Byron]

How to reproduce

Last tested with GB v0.11.1

• clone the linux kernel locally, possibly like so: git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
• add the newly cloned directory as project

If this never happened before happened, the GUI will now show nothing for a long time, until all gravatar images have been loaded in the background.

Related

• stuck on "lets go" after adding a project if there is no network access (firewall) #2640

[Byron]

It seems like list-virtual-branches is incredibly slow, due to the usage of mergebase computation on a large history. It seems to (have to?) consider too many commits on a graph with more than one million of them.