Plotting image data in Julia is much slower than MATLAB

General Usage
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21

Not bad in GMT

using GMT
@time gmtwrite("test.png", mat2img(rand(UInt8, 20_000, 20_000)))
 21.020054 seconds (139 allocations: 763.254 MiB, 0.23% gc time)

@time gmtwrite("test.png", mat2img(rand(UInt8, 20_000, 20_000, 3)))
 64.790045 seconds (139 allocations: 2.235 GiB, 0.12% gc time)
# test.png size ~1.11 GB
22

Perhaps try ImageView again, v0.11 should support this fairly well. If it doesn’t, please file an issue with the package.

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