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diff stencil.jl @ 88:170e5447bc19 patch_based_test

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Reduce allocations
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 25 Jan 2019 15:10:41 +0100
parents 38733e84ef1a
children c0729ade65da
line wrap: on
line diff
--- a/stencil.jl	Fri Jan 25 13:40:15 2019 +0100
+++ b/stencil.jl	Fri Jan 25 15:10:41 2019 +0100
@@ -31,3 +31,12 @@
     end
     return w
 end
+
+Base.@propagate_inbounds function applybackwards(s::Stencil, v::AbstractVector, i::Int)
+    w = zero(eltype(v))
+    for j ∈ s.range[1]:s.range[2]
+        @inbounds weight = s[j]
+        w += weight*v[i-j]
+    end
+    return w
+end