# What approach did you decide to follow?
I saved the adress in present_configuration to a new pointer old_configuration so i could delete it after running the step function:
      // Simple fix to memleak:
      float* old_configuration = present_configuration;
      present_configuration = crw::step(size, present_configuration);
      delete old_configuration;
      float present_elongation = crw::elongation(size, present_configuration);

# determine the speedup
See 11_speedup.png