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|
use criterion::{criterion_group, Criterion, ParameterizedBenchmark};
use plotters::coord::Shift;
use plotters::prelude::*;
use rayon::prelude::*;
const SIZES: &'static [u32] = &[100, 400, 800, 1000, 2000];
fn draw_plot(root: &DrawingArea<BitMapBackend, Shift>, pow: f64) {
let mut chart = ChartBuilder::on(root)
.caption(format!("y = x^{}", pow), ("Arial", 30))
.build_cartesian_2d(-1.0..1.0, -1.0..1.0)
.unwrap();
chart.configure_mesh().draw().unwrap();
chart
.draw_series(LineSeries::new(
(-50..=50)
.map(|x| x as f64 / 50.0)
.map(|x| (x, x.powf(pow))),
&RED,
))
.unwrap()
.label(format!("y = x^{}", pow))
.legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &RED));
chart
.configure_series_labels()
.background_style(&WHITE.mix(0.8))
.border_style(&BLACK)
.draw()
.unwrap();
}
fn draw_func_1x1_seq(c: &mut Criterion) {
c.bench(
"draw_func_1x1",
ParameterizedBenchmark::new(
"sequential",
|b, &&s| {
let mut buffer = vec![0; (s * s * 3) as usize];
b.iter(|| {
let root = BitMapBackend::with_buffer(&mut buffer, (s, s)).into_drawing_area();
root.fill(&WHITE).unwrap();
draw_plot(&root, 2.0);
})
},
SIZES.clone(),
),
);
}
fn draw_func_4x4(c: &mut Criterion) {
c.bench(
"draw_func_4x4",
ParameterizedBenchmark::new(
"sequential",
|b, &&s| {
let mut buffer = vec![0; (s * s * 3) as usize];
b.iter(|| {
let root = BitMapBackend::with_buffer(&mut buffer, (s, s)).into_drawing_area();
let areas = root.split_evenly((4, 4));
areas.iter().for_each(|area| draw_plot(&area, 2.0));
})
},
SIZES.clone(),
)
.with_function("blit", |b, &&s| {
let mut buffer = vec![0; (s * s * 3) as usize];
let mut element_buffer = vec![vec![0; (s * s / 4 * 3) as usize]; 4];
b.iter(|| {
let root = BitMapBackend::with_buffer(&mut buffer, (s, s)).into_drawing_area();
let areas = root.split_evenly((4, 4));
let elements: Vec<_> = element_buffer
.par_iter_mut()
.map(|b| {
let mut e = BitMapElement::with_mut((0, 0), (s / 2, s / 2), b).unwrap();
draw_plot(&e.as_bitmap_backend().into_drawing_area(), 2.0);
e
})
.collect();
areas
.into_iter()
.zip(elements.into_iter())
.for_each(|(a, e)| a.draw(&e).unwrap());
})
})
.with_function("inplace-blit", |b, &&s| {
let mut buffer = vec![0; (s * s * 3) as usize];
let mut element_buffer = vec![vec![vec![0; (s * s / 4 * 3) as usize]; 2]; 2];
b.iter(|| {
let mut back = BitMapBackend::with_buffer(&mut buffer, (s, s));
back.split(&[s / 2])
.into_iter()
.zip(element_buffer.iter_mut())
.collect::<Vec<_>>()
.into_par_iter()
.for_each(|(back, buffer)| {
let root = back.into_drawing_area();
let areas = root.split_evenly((1, 2));
let elements: Vec<_> = buffer
.par_iter_mut()
.map(|b| {
let mut e =
BitMapElement::with_mut((0, 0), (s / 2, s / 2), b).unwrap();
draw_plot(&e.as_bitmap_backend().into_drawing_area(), 2.0);
e
})
.collect();
areas
.into_iter()
.zip(elements.into_iter())
.for_each(|(a, e)| a.draw(&e).unwrap())
});
})
}),
);
}
fn draw_func_2x1(c: &mut Criterion) {
c.bench(
"draw_func_2x1",
ParameterizedBenchmark::new(
"blit",
|b, &&s| {
let mut buffer = vec![0; (s * s * 3) as usize];
let mut element_buffer = vec![vec![0; (s * s / 2 * 3) as usize]; 2];
b.iter(|| {
let root = BitMapBackend::with_buffer(&mut buffer, (s, s)).into_drawing_area();
let areas = root.split_evenly((2, 1));
let elements: Vec<_> = element_buffer
.par_iter_mut()
.map(|buf| {
let mut element =
BitMapElement::with_mut((0, 0), (s, s / 2), buf).unwrap();
draw_plot(&element.as_bitmap_backend().into_drawing_area(), 2.0);
element
})
.collect();
areas
.into_iter()
.zip(elements.into_iter())
.for_each(|(a, e)| a.draw(&e).unwrap());
})
},
SIZES.clone(),
)
.with_function("inplace", |b, &&s| {
let mut buffer = vec![0; (s * s * 3) as usize];
b.iter(|| {
let mut back = BitMapBackend::with_buffer(&mut buffer, (s, s));
back.split(&[s / 2])
.into_par_iter()
.for_each(|b| draw_plot(&b.into_drawing_area(), 2.0));
})
})
.with_function("sequential", |b, &&s| {
let mut buffer = vec![0; (s * s * 3) as usize];
b.iter(|| {
let root = BitMapBackend::with_buffer(&mut buffer, (s, s)).into_drawing_area();
root.split_evenly((2, 1))
.iter_mut()
.for_each(|area| draw_plot(area, 2.0));
})
}),
);
}
criterion_group! {
name = parallel_group;
config = Criterion::default().sample_size(10);
targets =
draw_func_1x1_seq,
draw_func_4x4,
draw_func_2x1,
}
|
