FisSal2011: Improve estimated tableau density

src/Cuts/tableau/gmi_dual.jl

@@ -327,6 +327,7 @@ function collect_gmi_FisSal2011(
         pool_cut_age = nothing
         pool_cut_hashes = Set{UInt64}()
         pool_size_mb = 0
+        tableau_density::Float32 = 0.05
         λ, Δ = 0, 0
         μ = 10
     end
@@ -470,7 +471,8 @@ function collect_gmi_FisSal2011(
             end
 
             @timeit "Compute tableau rows" begin
-                tableau = compute_tableau(data_s, basis, x = sol_frac, rows = selected_rows)
+                tableau = compute_tableau(data_s, basis, x = sol_frac, rows = selected_rows, estimated_density=tableau_density * 1.05)
+                tableau_density = nnz(tableau.lhs) / length(tableau.lhs)
                 assert_eq(tableau.lhs * sol_frac, tableau.rhs, atol=1e-3)
                 assert_eq(tableau.lhs * sol_opt_s, tableau.rhs, atol=1e-3)
             end

src/Cuts/tableau/tableau.jl

@@ -58,6 +58,7 @@ function compute_tableau(
     x::Union{Nothing,Vector{Float64}} = nothing,
     rows::Union{Vector{Int},Nothing} = nothing,
     tol = 1e-8,
+    estimated_density = 0.10,
 )::Tableau
     @timeit "Split data" begin
         nrows, ncols = size(data.constr_lhs)
@@ -78,7 +79,7 @@ function compute_tableau(
         tableau_lhs_I::Array{Int} = Int[]
         tableau_lhs_J::Array{Int} = Int[]
         tableau_lhs_V::Array{Float64} = Float64[]
-        estimated_nnz::Int = length(rows) * ncols ÷ 20
+        estimated_nnz::Int = round(length(rows) * ncols * estimated_density)
         sizehint!(tableau_lhs_I, estimated_nnz)
         sizehint!(tableau_lhs_J, estimated_nnz)
         sizehint!(tableau_lhs_V, estimated_nnz)