In my experience with HPC (i.e. 100% load on all cores), enabling Hyperthreading gives you higher job throughput at the cost of increasing the time to complete

In my experience with HPC (i.e. 100% load on all cores), enabling Hyperthreading gives you higher job throughput at the cost of increasing the time to complete a single job. The throughput improvement is around 5-30% depending on the applications being run. The average I've seen is around 20.