Update

Author: odow

src/Nonlinear/ReverseAD/forward_over_reverse.jl

@@ -6,6 +6,13 @@
 
 const TAG = :ReverseAD
 
+"""
+    const MAX_CHUNK::Int = 10
+
+An upper bound on the chunk sie for forward-over-reverse. Increasing this could
+improve performance at the cost of extra memory allocation. It has been 10 for a
+long time, and nobody seems to have complained.
+"""
 const MAX_CHUNK = 10
 
 """

test/Nonlinear/ReverseAD.jl

@@ -156,6 +156,7 @@ function test_objective_quadratic_multivariate_subexpressions()
     H = [NaN, NaN, NaN]
     μ = Float64[]
     MOI.eval_hessian_lagrangian(evaluator, H, val, 1.5, μ)
+    @test 0 == @allocated MOI.eval_hessian_lagrangian(evaluator, H, val, 1.5, μ)
     @test H == 1.5 .* [2.0, 2.0, 1.0]
     v = [0.3, 0.4]
     hv = [NaN, NaN]