Hi,
imfilter exibit a huge variable performance drop when used in conjonction with ImageView.
Here is the test code:
using Images # ImageView
function test_imfilter()
gk = Kernel.gaussian(2.0f0)
I = rand(Float32,1000,2000)
for i = 1:9
start = time()
J = imfilter(I,gk)
t = round(time() - start, digits=6)
println("$i imfilter $t sec")
end
end
And the case, see that once ImageView is in use the performance drops
julia> include("test_imfilter.jl")
test_imfilter (generic function with 1 method)
julia> test_imfilter()
1 imfilter 0.357333 sec
2 imfilter 0.102812 sec
3 imfilter 0.02313 sec
4 imfilter 0.022202 sec
5 imfilter 0.023004 sec
6 imfilter 0.022911 sec
7 imfilter 0.022197 sec
8 imfilter 0.022959 sec
9 imfilter 0.022229 sec
julia> using ImageView
Gtk-Message: 07:11:13.124: Failed to load module "canberra-gtk-module"
Gtk-Message: 07:11:13.125: Failed to load module "canberra-gtk-module"
julia> test_imfilter()
1 imfilter 5.025525 sec
2 imfilter 0.027089 sec
3 imfilter 5.06874 sec
4 imfilter 2.871562 sec
5 imfilter 2.081181 sec
6 imfilter 0.118777 sec
7 imfilter 0.234288 sec
8 imfilter 5.030625 sec
9 imfilter 5.030824 sec
and strange enough
julia> @benchmark imfilter($I,$gk)
BenchmarkTools.Trial:
memory estimate: 223.13 KiB
allocs estimate: 146
--------------
minimum time: 428.595 μs (0.00% GC)
median time: 465.805 μs (0.00% GC)
mean time: 218.079 ms (0.00% GC)
maximum time: 5.006 s (0.00% GC)
--------------
samples: 23
evals/sample: 1
