Deflated CG with 2048 eigenvectors solves HISQ propagators about 10x faster than standard CG on a 144^3 x 288 lattice at the physical light quark mass, excluding eigenvector setup cost.
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Improving HISQ propagator solves using deflation
Deflated CG with 2048 eigenvectors solves HISQ propagators about 10x faster than standard CG on a 144^3 x 288 lattice at the physical light quark mass, excluding eigenvector setup cost.