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|
use valuable::*;
use criterion::{black_box, criterion_group, criterion_main, Criterion};
#[derive(Default)]
struct HelloWorld {
one: usize,
two: usize,
three: usize,
four: usize,
five: usize,
six: usize,
}
static FIELDS: &[NamedField<'static>] = &[
NamedField::new("one"),
NamedField::new("two"),
NamedField::new("three"),
NamedField::new("four"),
NamedField::new("five"),
NamedField::new("six"),
];
impl Structable for HelloWorld {
fn definition(&self) -> StructDef<'_> {
StructDef::new_static("HelloWorld", Fields::Named(FIELDS))
}
}
impl Valuable for HelloWorld {
fn as_value(&self) -> Value<'_> {
Value::Structable(self)
}
fn visit(&self, v: &mut dyn Visit) {
v.visit_named_fields(&NamedValues::new(
FIELDS,
&[
Value::Usize(self.one),
Value::Usize(self.two),
Value::Usize(self.three),
Value::Usize(self.four),
Value::Usize(self.five),
Value::Usize(self.six),
],
));
}
}
fn criterion_benchmark(c: &mut Criterion) {
const NUM: usize = 50;
let hello_world = black_box(HelloWorld::default());
let structable = &hello_world as &dyn Structable;
let f = match structable.definition() {
StructDef::Static {
fields: Fields::Named(fields),
..
} => &fields[5],
_ => unreachable!(),
};
struct Sum(usize, &'static NamedField<'static>);
impl Visit for Sum {
fn visit_named_fields(&mut self, record: &NamedValues<'_>) {
self.0 += match record.get(self.1) {
Some(Value::Usize(v)) => v,
_ => return,
}
}
fn visit_value(&mut self, _: Value<'_>) {
unimplemented!()
}
}
c.bench_function("struct", |b| {
b.iter(|| {
let mut num = 0;
for _ in 0..NUM {
let hello_world = black_box(HelloWorld::default());
num += hello_world.six;
}
black_box(num);
})
});
c.bench_function("valuable", |b| {
b.iter(|| {
let mut v = Sum(black_box(0), f);
for _ in 0..NUM {
v.visit_named_fields(&NamedValues::new(
FIELDS,
&[
Value::Usize(0),
Value::Usize(0),
Value::Usize(0),
Value::Usize(0),
Value::Usize(0),
Value::Usize(0),
],
));
/*
v.visit_struct(&Record::new(
&definition,
&[
Value::Usize(hello_world.one),
Value::Usize(hello_world.two),
Value::Usize(hello_world.three),
Value::Usize(hello_world.four),
Value::Usize(hello_world.five),
Value::Usize(hello_world.six),
]
));
*/
// hello_world.visit(&mut v);
}
black_box(v.0);
})
});
}
criterion_group!(benches, criterion_benchmark);
criterion_main!(benches);
|
