From f4b055c9c3045ac8be271505df97f4980b44b643 Mon Sep 17 00:00:00 2001
From: Sheehan Olver <solver@mac.com>
Date: Tue, 5 May 2026 16:43:16 +0100
Subject: [PATCH] avoid calls to axes to make sparse faster

---
 ext/BlockBandedMatricesSparseArraysExt.jl | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ext/BlockBandedMatricesSparseArraysExt.jl b/ext/BlockBandedMatricesSparseArraysExt.jl
index 442415e..e52d549 100644
--- a/ext/BlockBandedMatricesSparseArraysExt.jl
+++ b/ext/BlockBandedMatricesSparseArraysExt.jl
@@ -11,13 +11,14 @@ function sparse(A::BandedBlockBandedMatrix)
     i = Vector{Int}()
     j = Vector{Int}()
     z = Vector{eltype(A)}()
+    m_ax,n_ax = axes(A)
     for J = blockaxes(A,2), K = blockcolsupport(A, J)
         B = view(A, K, J)
         ĩ = _banded_rowval(B)
         j̃ = _banded_colval(B)
         z̃ = _banded_nzval(B)
-        ĩ .+= first(axes(A,1)[K])-1
-        j̃ .+= first(axes(A,2)[J])-1
+        ĩ .+= first(m_ax[K])-1
+        j̃ .+= first(n_ax[J])-1
         append!(i, ĩ)
         append!(j, j̃)
         append!(z, z̃)