This C++ version of BAT is still being maintained, but addition of new features is unlikely. Check out our new incarnation, BAT.jl, the Bayesian analysis toolkit in Julia. In addition to Metropolis-Hastings sampling, BAT.jl supports Hamiltonian Monte Carlo (HMC) with automatic differentiation, automatic prior-based parameter space transformations, and much more. See the BAT.jl documentation.

Results of performance testing for BAT version 0.9

Test "2d_gaus_lag"

Subtest values as a function of the variation parameter. Red: target values, blue: test values and uncertainties.	Subtest values as a function of the variation parameter. Red: target values, blue: test values and uncertainties.	Subtest values as a function of the variation parameter. Red: target values, blue: test values and uncertainties.