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#![feature(test)]
extern crate test;
use std::{
fmt::{self, Display},
str::FromStr,
};
bitflags::bitflags! {
struct Flags10: u32 {
const A = 0b0000_0000_0000_0001;
const B = 0b0000_0000_0000_0010;
const C = 0b0000_0000_0000_0100;
const D = 0b0000_0000_0000_1000;
const E = 0b0000_0000_0001_0000;
const F = 0b0000_0000_0010_0000;
const G = 0b0000_0000_0100_0000;
const H = 0b0000_0000_1000_0000;
const I = 0b0000_0001_0000_0000;
const J = 0b0000_0010_0000_0000;
}
}
impl FromStr for Flags10 {
type Err = bitflags::parser::ParseError;
fn from_str(flags: &str) -> Result<Self, Self::Err> {
Ok(Flags10(flags.parse()?))
}
}
impl Display for Flags10 {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Display::fmt(&self.0, f)
}
}
#[bench]
fn format_flags_1_present(b: &mut test::Bencher) {
b.iter(|| Flags10::J.to_string())
}
#[bench]
fn format_flags_5_present(b: &mut test::Bencher) {
b.iter(|| (Flags10::F | Flags10::G | Flags10::H | Flags10::I | Flags10::J).to_string())
}
#[bench]
fn format_flags_10_present(b: &mut test::Bencher) {
b.iter(|| {
(Flags10::A
| Flags10::B
| Flags10::C
| Flags10::D
| Flags10::E
| Flags10::F
| Flags10::G
| Flags10::H
| Flags10::I
| Flags10::J)
.to_string()
})
}
#[bench]
fn parse_flags_1_10(b: &mut test::Bencher) {
b.iter(|| {
let flags: Flags10 = "J".parse().unwrap();
flags
})
}
#[bench]
fn parse_flags_5_10(b: &mut test::Bencher) {
b.iter(|| {
let flags: Flags10 = "F | G | H | I | J".parse().unwrap();
flags
})
}
#[bench]
fn parse_flags_10_10(b: &mut test::Bencher) {
b.iter(|| {
let flags: Flags10 = "A | B | C | D | E | F | G | H | I | J".parse().unwrap();
flags
})
}
#[bench]
fn parse_flags_1_10_hex(b: &mut test::Bencher) {
b.iter(|| {
let flags: Flags10 = "0xFF".parse().unwrap();
flags
})
}