iterations per second of FMGRES is constant whereas it decreases with TSIRM with
both preconditioners. This can be explained by the fact that when the number of
cores increases the time for the least-squares minimization step also increases but, generally,
iterations per second of FMGRES is constant whereas it decreases with TSIRM with
both preconditioners. This can be explained by the fact that when the number of
cores increases the time for the least-squares minimization step also increases but, generally,