On Fri, Mar 24, 2023 at 02:20:01PM -0400, Derrick Stolee wrote:

Hm. The point is that it _should_ improve things by several orders
of magnitude [...]

well, at that point it would be kinda sufficient. ^^
but it really doesn't do anything at all (i tried moving away the graph 
for comparison).
maybe the operation just forgets to load the graph?

But what you were originally asking was also about filtering the
set of branches to pick,

i didn't, i was just misunderstood.