# Why does the optimization take so long?

The optimization mode is parallelized so it runs one backtest per available CPU. This means the fewer CPUs the slower the optimization. The time it takes is exactly the same as the backtest duration multiplied by the number of iterations divided by the number of CPUs. The shown ETA is just a very very rough estimation. The actual duration it takes for a solution varies depending on the complexity of the strategy, timeframe and many more variables. See "What is a good DNA ?" for more information.

Last updated: 3 years ago