In order to help the user in choosing the right action a performance
comparison is done for seven improved actions. Six of them are Symanzik
improved, one at tree-level and two at one-loop, all with or without tadpole
improvement. The seventh is an approximate fixed point action. Observables are
static on- and off-axis two-body potentials and four-body binding energies,
whose precision is compared when the same amount of computer time is used by
the programs.Comment: 3 pages, 3 colour eps figures. Presented at LATTICE9
