  In modern lattice simulations, conventional update algorithms do not allow
for tunneling between topological sectors at fine lattice spacings. We compare
the viability of multiple less commonly used algorithms (metadynamics,
instanton updates, and multiscale thermalization) with respect to proper
sampling of all topological sectors in the Schwinger model. We briefly comment
on the prospects of applying these methods to 4-dimensional SU(3) simulations.
