# Optimization algorithms¶

HPOlib ships several optimization packages by default. These are:

## Configuration Runner¶

The ConfigurationRunner is an optimizer which runs configurations saved in a csv file. It is useful to evaluate configurations which do not come from an optimization algorithm and still benefit from HPOlib’s functionality.

By default, it expects a csv file called configurations as input. The first line determines the names of the hyperparameters, every following line determines a single configuration.

The following is an example file for the branin function:

x,y
0,0
1,1
2,2
3,3
4,4
5,5
6,6
7,7
8,8
9,9
10,10


WARNING: ConfigurationRunner does not check if the configurations adhere to any configuration space. This must be done by the user.

Furthermore, ConfigurationRunner can execute the function evaluations in parallel. This is governed by the argument n_jobs and only useful if the target machine has enough processors/cores or the jobs are distributed across several machines.