minimize_cigars is more than 5x faster when using the column-iterator
minimize_cigars is more than 5x faster when using the column-iterator

Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara