  As algorithmic developments have driven down the cost of simulating
degenerate light quark flavors the relative cost of simulating single quark
flavors with the Rational Hybrid Monte Carlo (RHMC) algorithm has become more
expensive. TWQCD has proposed an exact one-flavor algorithm (EOFA) that allows
for HMC simulations of a single quark flavor without taking a square root of
the fermion determinant. We have independently implemented EOFA in the Columbia
Physics System (CPS) and BAGEL Fermion Sparse-Matrix Library (BFM) for Shamir
and M\"{o}bius domain wall fermions, and begun to optimize and test our
implementation against RHMC. In this talk we discuss the derivation of the EOFA
action, our tests of its equivalence to RHMC, and the current state of our
implementation and optimization. We find, after introducing a novel
preconditioning technique for the EOFA Dirac operator, that EOFA is a factor of
2.4 times faster than RHMC per molecular dynamics trajectory for the strange
quark determinant on an $N_{f} = 2+1$ M\"{o}bius DWF ensemble with physical
quark masses and a $24^{3} \times 64 \times 24$ volume. We expect that further
improvement is possible by retuning the integrator parameters for EOFA and by
continuing to optimize our code.
