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Enormous unnecessary memory allocation #638

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baggepinnen opened this issue Nov 28, 2023 · 1 comment

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bug

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baggepinnen commented Nov 28, 2023

The allocation of dense hessians of individual entries of a constraint vector taking place here

Optimization.jl/lib/OptimizationMOI/src/nlp.jl

Line 130 in c178ba0

    
           Matrix{T}[zeros(T, 0, 0) for i in 1:num_cons] # No need to allocate this up if using lag hessian

can easily lead to OOM errors for large problems, while allocation of a dense Lagrangian hessian only would be no problem.

baggepinnen added the bug label

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baggepinnen commented Nov 28, 2023

Hmm, it seems my lagh was provided in the wrong way and wasn't registered, the large arrays should not be allocated if the lagh prototype is passed

baggepinnen closed this as completed

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