Hi all.
I have this matrix that has a size of 3250x55650 and it is just a sample of my raw data.
I have a few files much larger.
I need to make heatmaps but Plots.jl is a bit slow on CPU when I run these lines
p1=heatmap(tticks,offset,strainrate,color=:viridis, clims=(-2000,2000))
plot(p1,size=(1600,800))
Is it maybe a best way to handle very big matrix for fast plotting? Maybe plotting on GPU (I have a MacBook Air with an M1 Chip).
Thanks in advance 
Makie?
Never tried Makie. Is it fast and does it work with GPU?
GLmakie uses the GPU and should be quite fast although I have never used it on this kind of scale
Fyi, the InteractiveViz package looks very interesting.
It takes ~1 s to display a 3250 x 55650 heatmap (~180M points, not all displayed as it is pointless) and zooming in and out is instantaneous (bringing more points in, as needed):
using InteractiveViz, GLMakie
strainrate = sind.((1:3250) .* (1:55650)'/5e4)
iheatmap(strainrate; cursor=true)
with interactive zoom-in and cursor info:
Does it have 3D?
No
This is great but there are some limitations like no color bar 
Not really working on my computer (MacBook Air M1) getting this error when using large data sets:
UNSUPPORTED (log once): POSSIBLE ISSUE: unit 1 GLD_TEXTURE_INDEX_1D is unloadable and bound to sampler type (Float) - using zero texture because texture unloadable
Indeed, but I guess fixing it should be a piece of cake for the Makie gurus.
Now I can’t run the code anymore, I get errors:
ERROR: No backend available (GLMakie, CairoMakie, WGLMakie)!
But I think the following commands add a colorbar on the left side:
fig = Figure()
iheatmap(strainrate; cursor=true);
Colorbar(fig[1,-1], limits=(-1, 1), colormap=:viridis, flipaxis=false)
Perhaps some left padding can be added to the plot.
Did not work for me
Colorbar(fig[-1,-1], limits=(-1, 1), colormap=:viridis, flipaxis=false)
Produces a colorbar, but it is on top of the y-axis:
It worked this time. I was trying to link it to Axis in Makie, but it didn´t work. It is a great package, it is a shame it is still in development hehe. Thanks @rafael.guerra
