--- a/src/ImFilter.jl	Wed Dec 25 17:42:32 2019 +0200
+++ b/src/ImFilter.jl	Fri Dec 27 20:59:44 2019 +0200
@@ -43,12 +43,12 @@
             tmp = 0.0
             it₁ = inside(i, a₁, b₁, 1, n)
             it₂ = inside(j, a₂, b₂, 1, m)
-            for p=it₁
+            @inbounds for p=it₁
                 @simd for q=it₂
-                    tmp += @inbounds(kp[p-o₁, q-o₂]*b[i+p,j+q])
+                    tmp += kp[p-o₁, q-o₂]*b[i+p,j+q]
                 end
             end
-            res[i, j] = tmp
+            @inbounds res[i, j] = tmp
         end
     end