https://julialang.slack.com/archives/C017Z6Q3WS3/p1603760887270300
looks like pluto would become extremely slow if there's a big svg plot? e.g
using Plots
scatter(rand(10^5), rand(10^5))
18 replies
I don't think any environment would handle that gracefully. Eg jupyter would be slow too. You could just make a 2d histogram instead, or move to makie
in the end I want the 2d histogram, but that was for debugging purpose, I either lower it to 10^3 or fmt=:png, but yeah, it felt even slower than jupyter
CairoMakie outputs SVGs by default and I ran into the same problem (so I used CarioMakie.activate!(type="png") to switch to PNGs by default). Probably WGLMakie would handle it better? Not totally sure since I couldn't get it working (my pluto notebook is served remotely and I think there's some port issues with WGLMakie)
I wonder if there's a way that Pluto could just refuse to render the SVG if it's too big? rather than the whole browser slowing down, making it hard to fix the issue (edited)
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It's faster if you force Plots.jl to output svg instead of svg-inside-HTML:
let
hackahcakhcak
scatter(...)
end |> PlutoUI.as_svg
(since PlutoUI 0.6.8 from last week)we can talk more about why this is faster if anyone is interested? (edited)
I am
(you can also use PlutoUI.as``_png for very large plots to rasterize them)
Does as_svg do data stripping or something like that? Or is it just a matter of rendering the svg in an img tag instead of in the dom?
I haven't figured it out completely but if an image is rendered as SVG MIME, then Pluto renders it as <img src=".. the svg data .."> instead of .innerHTML so this must cause the performance increase
as for why, I think it is because CSS is only applied to the latter, so the browser can skip the CSS calculations in the former
yeah that makes sense (edited)
a second Pluto-specific thing is that when a cell updates, and the output before and after are both <img , then it will only replace the src , which prevents a one-frame flicker
fancy
still won't help with really big svgs though
but then again, nothing can
except for refusing to render large blobs
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I wonder if this was why Pluto was choking when I tried to make a large subplot with a scatter... hmm