Creating multigrid hierarchy (e.g., `ruge_stuben`) allocates too much memory

JuliaLinearAlgebra / AlgebraicMultigrid.jl

Algebraic Multigrid in Julia

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Creating multigrid hierarchy (e.g., `ruge_stuben`) allocates too much memory #108

Open ma-sadeghi opened 10 months ago

ma-sadeghi commented 10 months ago

For a test problem (Laplace equation on a 200^3 grid), ruge_stuben allocates ~8 GB of memory. For comparison, LinearSolve.KrylovJL_CG allocates ~90 MB.

Is this normal / can it be optimized?

Thanks!