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Diffstat (limited to 'vendor/writeable/benches/writeable.rs')
| -rw-r--r-- | vendor/writeable/benches/writeable.rs | 239 |
1 files changed, 0 insertions, 239 deletions
diff --git a/vendor/writeable/benches/writeable.rs b/vendor/writeable/benches/writeable.rs deleted file mode 100644 index 09a03f14..00000000 --- a/vendor/writeable/benches/writeable.rs +++ /dev/null @@ -1,239 +0,0 @@ -// This file is part of ICU4X. For terms of use, please see the file -// called LICENSE at the top level of the ICU4X source tree -// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ). - -use criterion::{black_box, criterion_group, criterion_main, Criterion}; -use std::fmt; -use writeable::LengthHint; -use writeable::Writeable; - -/// A sample type implementing Writeable -struct WriteableMessage<'s> { - message: &'s str, -} - -impl Writeable for WriteableMessage<'_> { - fn write_to<W: fmt::Write + ?Sized>(&self, sink: &mut W) -> fmt::Result { - sink.write_str(self.message) - } - - fn writeable_length_hint(&self) -> LengthHint { - LengthHint::exact(self.message.len()) - } -} - -writeable::impl_display_with_writeable!(WriteableMessage<'_>); - -/// A sample type implementing Display -struct DisplayMessage<'s> { - message: &'s str, -} - -impl fmt::Display for DisplayMessage<'_> { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.write_str(self.message) - } -} - -/// A sample type that contains multiple fields -struct ComplexWriteable<'a> { - prefix: &'a str, - n0: usize, - infix: &'a str, - n1: usize, - suffix: &'a str, -} - -impl Writeable for ComplexWriteable<'_> { - fn write_to<W: fmt::Write + ?Sized>(&self, sink: &mut W) -> fmt::Result { - self.prefix.write_to(sink)?; - self.n0.write_to(sink)?; - self.infix.write_to(sink)?; - self.n1.write_to(sink)?; - self.suffix.write_to(sink)?; - Ok(()) - } - - fn writeable_length_hint(&self) -> LengthHint { - self.prefix.writeable_length_hint() - + self.n0.writeable_length_hint() - + self.infix.writeable_length_hint() - + self.n1.writeable_length_hint() - + self.suffix.writeable_length_hint() - } -} - -writeable::impl_display_with_writeable!(ComplexWriteable<'_>); - -const SHORT_STR: &str = "short"; -const MEDIUM_STR: &str = "this is a medium-length string"; -const LONG_STR: &str = "this string is very very very very very very very very very very very very very very very very very very very very very very very very long"; -const LONG_OVERLAP_STR: &str = - "this string is very very very very very very very long but different"; - -fn overview_bench(c: &mut Criterion) { - c.bench_function("writeable/overview", |b| { - b.iter(|| { - // This benchmark runs to_string on short, medium, and long strings in one batch. - WriteableMessage { - message: black_box(SHORT_STR), - } - .write_to_string(); - WriteableMessage { - message: black_box(MEDIUM_STR), - } - .write_to_string(); - WriteableMessage { - message: black_box(LONG_STR), - } - .write_to_string(); - }); - }); - - { - writeable_benches(c); - writeable_dyn_benches(c); - display_benches(c); - complex_benches(c); - } -} - -fn writeable_benches(c: &mut Criterion) { - c.bench_function("writeable/to_string/short", |b| { - b.iter(|| { - WriteableMessage { - message: black_box(SHORT_STR), - } - .write_to_string() - .into_owned() - }); - }); - c.bench_function("writeable/to_string/medium", |b| { - b.iter(|| { - WriteableMessage { - message: black_box(MEDIUM_STR), - } - .write_to_string() - .into_owned() - }); - }); - c.bench_function("writeable/to_string/long", |b| { - b.iter(|| { - WriteableMessage { - message: black_box(LONG_STR), - } - .write_to_string() - .into_owned() - }); - }); - c.bench_function("writeable/cmp_str", |b| { - b.iter(|| { - let short = black_box(SHORT_STR); - let medium = black_box(MEDIUM_STR); - let long = black_box(LONG_STR); - let long_overlap = black_box(LONG_OVERLAP_STR); - [short, medium, long, long_overlap].map(|s1| { - [short, medium, long, long_overlap].map(|s2| { - let message = WriteableMessage { message: s1 }; - writeable::cmp_str(&message, s2) - }) - }) - }); - }); -} - -fn writeable_dyn_benches(c: &mut Criterion) { - // Same as `write_to_string`, but casts to a `dyn fmt::Write` - fn writeable_dyn_to_string(w: &impl Writeable) -> String { - let mut output = String::with_capacity(w.writeable_length_hint().capacity()); - w.write_to(&mut output as &mut dyn fmt::Write) - .expect("impl Write for String is infallible"); - output - } - - c.bench_function("writeable_dyn/to_string/short", |b| { - b.iter(|| { - writeable_dyn_to_string(&WriteableMessage { - message: black_box(SHORT_STR), - }) - }); - }); - c.bench_function("writeable_dyn/to_string/medium", |b| { - b.iter(|| { - writeable_dyn_to_string(&WriteableMessage { - message: black_box(MEDIUM_STR), - }) - }); - }); - c.bench_function("writeable_dyn/to_string/long", |b| { - b.iter(|| { - writeable_dyn_to_string(&WriteableMessage { - message: black_box(LONG_STR), - }) - }); - }); -} - -fn display_benches(c: &mut Criterion) { - c.bench_function("display/to_string/short", |b| { - b.iter(|| { - DisplayMessage { - message: black_box(SHORT_STR), - } - .to_string() - }); - }); - c.bench_function("display/to_string/medium", |b| { - b.iter(|| { - DisplayMessage { - message: black_box(MEDIUM_STR), - } - .to_string() - }); - }); - c.bench_function("display/to_string/long", |b| { - b.iter(|| { - DisplayMessage { - message: black_box(LONG_STR), - } - .to_string() - }); - }); -} - -fn complex_benches(c: &mut Criterion) { - const COMPLEX_WRITEABLE_MEDIUM: ComplexWriteable = ComplexWriteable { - prefix: "There are ", - n0: 55, - infix: " apples and ", - n1: 8124, - suffix: " oranges", - }; - c.bench_function("complex/write_to_string/medium", |b| { - b.iter(|| { - black_box(COMPLEX_WRITEABLE_MEDIUM) - .write_to_string() - .into_owned() - }); - }); - c.bench_function("complex/display_to_string/medium", |b| { - b.iter(|| black_box(COMPLEX_WRITEABLE_MEDIUM).to_string()); - }); - const REFERENCE_STRS: [&str; 6] = [ - "There are 55 apples and 8124 oranges", - "There are 55 apples and 0 oranges", - "There are no apples", - SHORT_STR, - MEDIUM_STR, - LONG_STR, - ]; - c.bench_function("complex/cmp_str", |b| { - b.iter(|| { - black_box(REFERENCE_STRS) - .map(|s| writeable::cmp_str(black_box(&COMPLEX_WRITEABLE_MEDIUM), s)) - }); - }); -} - -criterion_group!(benches, overview_bench,); -criterion_main!(benches); |