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As algorithmic developments have driven down the cost of simulatingdegenerate light quark flavors the relative cost of simulating single quarkflavors with the Rational Hybrid Monte Carlo (RHMC) algorithm has become moreexpensive. TWQCD has proposed an exact one-flavor algorithm (EOFA) that allowsfor HMC simulations of a single quark flavor without taking a square root ofthe fermion determinant. We have independently implemented EOFA in the ColumbiaPhysics System (CPS) and BAGEL Fermion Sparse-Matrix Library (BFM) for Shamirand M\"{o}bius domain wall fermions, and begun to optimize and test ourimplementation against RHMC. In this talk we discuss the derivation of the EOFAaction, our tests of its equivalence to RHMC, and the current state of ourimplementation and optimization. We find, after introducing a novelpreconditioning technique for the EOFA Dirac operator, that EOFA is a factor of2.4 times faster than RHMC per molecular dynamics trajectory for the strangequark determinant on an $N_{f} = 2+1$ M\"{o}bius DWF ensemble with physicalquark masses and a $24^{3} \times 64 \times 24$ volume. We expect that furtherimprovement is possible by retuning the integrator parameters for EOFA and bycontinuing to optimize our code.

Domain Wall Fermion Simulations with the Exact One-Flavor Algorithm