- Performance improvement for the first order perturbation solution using either cycle reduction (`dr=cycle_reduction` option) or logarithmic reduction (`dr=logarithmic_reduction`) (!2085, !2089)
- When using block decomposition (with the `block` option of the `model` block), the option `mfs` now defaults to `1`. This setting should deliver better performance on most models, so it is a better default value.
- New model editing features (21a8a5794a83b5098cad0fe7beab93dcbe5ef6bf and 4db28998687b8845568e8750d99a1b45f0d6a94f)
- multiple `model` blocks are now supported (this was already working but not explicitly documented)
