added 2d arrays to benchmarks.

for 2d array `OffsetArray` performance penalty over `Array` is small.

Author: alsam

benchmark/benchmarks.jl

@@ -5,14 +5,22 @@ const dim = 1000
 
 x = Array(Float64, 2*dim)
 y = OffsetArray(Float64, -dim + 1 : dim)
+x2d = Array(Float64, 2*dim, 2*dim)
+y2d = OffsetArray(Float64, -dim + 1 : dim, -dim + 1 : dim)
 
-fillx(x) = for i in indices(x,1); x[i] = i; end
-updatex(x) = for i in indices(x,1); x[i] = x[i] + i; end
-updatex_eachindex(x) = for i in eachindex(x); x[i] = x[i] + i; end
+fill(x) = for i in indices(x,1); x[i] = i; end
+fill2d(x) = for i in indices(x,1); for j in indices(x,2); x[i,j] = i + j; end; end
+update(x) = for i in indices(x,1); x[i] = x[i] + i; end
+update2d(x) = for i in indices(x,1); for j in indices(x,2); x[i,j] = x[i,j] + i + j; end; end
+update_eachindex(x) = for i in eachindex(x); x[i] = x[i] + i; end
 
-@show @benchmark fillx(x)
-@show @benchmark fillx(y)
-@show @benchmark updatex(x)
-@show @benchmark updatex(y)
-@show @benchmark updatex_eachindex(x)
-@show @benchmark updatex_eachindex(y)
+@show @benchmark fill(x)
+@show @benchmark fill(y)
+@show @benchmark fill2d(x2d)
+@show @benchmark fill2d(y2d)
+@show @benchmark update(x)
+@show @benchmark update(y)
+@show @benchmark update2d(x2d)
+@show @benchmark update2d(y2d)
+@show @benchmark update_eachindex(x)
+@show @benchmark update_eachindex(y)