The perf tests in particular. A lot of stuff is logged using that, but not the parts I want, i.e.
test____________: performance__sha256a_none__merkle
algorithm_______: N10libbitcoin6system3sha9algorithmINS1_4h256ILm256ELb1EEELb0ELb0ELb1ELb1EEE
test_rounds_____: 10240
bytes_per_round_: 1
native__________: 0
vectorized______: 0
cached__________: 1
chunked_________: 0
seconds_total___: 0.452969
mib_per_second__: 0.0215592
cycles_per_byte_: 132706
ms_per_round____: 0.0442352
ms_per_byte_____: 0.0442352