ML_LFAST

ML_LFAST = [logical]
Default: ML_LFAST = .FALSE.

Description: This tag switches on the very fast execution mode for ML_ISTART=2.

This tag is only available in the development version of VASP.

This tag significantly speeds up the calculation for ML_ISTART=2, but without the Bayesian error prediction. One can still have Bayesian error prediction by carrying out the slow version at every n step, by setting ML_IERR=n. But by default, this is omitted.

Since the calculation time of the fast version is of the same order of magnitude as the timing for the output of the molecular-dynamics results, we advise decreasing the output frequency for molecular dynamics. This is controlled by the tag ML_OUTBLOCK. By default, it writes out all molecular-dynamics results at every molecular-dynamics step. Additionally, the calculation and output of the pair-correlation function can be suppressed by setting ML_OUTPUT_MODE=0.

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