Re: Accept GUILE 2 without extra configure options (issue 569390043 by address@hidden)

[hanwenn]

make baseline:

1.8:
real    3m41.714s
user    6m52.414s
sys     0m36.662s

2.2:
real    6m8.344s
user    12m51.799s
sys     0m34.875s

I think this warrants some deeper look, though: I have the impression
that the lilypond-book regression tests aren't parallelized. They also
suffer from the higher start up costs (there are some 60 of them, so
that's 90 seconds right there).

https://codereview.appspot.com/569390043/