Line plot with 3 data points creates huge SVG file (920 MB)

[venkat0791]

Describe the bug
A simple line plot with 3 data points produces a huge (920 MB!) SVG file, which I can't even open. See code below. This must have something to do with the y-values being very small, because scaling them all up by 1e14 produces a normal-sized SVG file (3.1 kB), as expected.

To reproduce

use kuva::prelude::*;

let plots = vec![LinePlot::new()
    .with_data(vec![(0.0, 1.0e-14), (0.5, 2.0e-14), (1.0, 1.5e-14)])
    .into()
];
let layout = Layout::auto_from_plots(&plots)
    .with_title("My Plot")
    .with_x_label("X")
    .with_y_label("Y");
let svg = render_to_svg(plots, layout);
std::fs::write("my_plot.svg", svg).unwrap();

Environment

• kuva version: 0.2.0
• Rust version (rustc --version): 1.91.0
• OS: Linux Mint 22.3

[Psy-Fer]

Oh wow that's a fun one!

I'll have a look at that tomorrow.
Thanks for the example.

James

[gabo515]

kuva/src/render/render_utils.rs

Lines 34 to 37 in ad12401

	while tick <= end + 1e-8 {
	ticks.push((tick * 1e6).round() / 1e6); // round to avoid float spam
	tick += step;
	}

I think I found the issue. Didn't want to overstep since you self-assigned but happy to make a PR.