I just tried the first part of this (the ssh multiplexing) and instead of getting faster, 'git fetch' got slower (1.9 to 2.4 seconds). Any ideas why, and how I

I just tried the first part of this (the ssh multiplexing) and instead of getting faster, 'git fetch' got slower (1.9 to 2.4 seconds). Any ideas why, and how I can debug/improve it?