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Remove pointless black_box call, add a comment about the unaligned_ benches, and clean up stray semicolon

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Thom Chiovoloni 2020-07-06 07:43:32 -07:00
parent dc4a644980
commit a150dcc872
2 changed files with 5 additions and 4 deletions
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2
src/libcore/benches/ascii.rs
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@ -60,7 +60,7 @@ macro_rules! benches {
}
)+
}
};
}
}
use test::black_box;

7
src/libcore/benches/ascii/is_ascii.rs
View file

@ -7,7 +7,9 @@ macro_rules! benches {
benches!(mod short SHORT[..] $($name $arg $body)+);
benches!(mod medium MEDIUM[..] $($name $arg $body)+);
benches!(mod long LONG[..] $($name $arg $body)+);
// Ensure we benchmark cases where the functions are called with strings
// that are not perfectly aligned or have a length which is not a
// multiple of size_of::<usize>() (or both)
benches!(mod unaligned_head MEDIUM[1..] $($name $arg $body)+);
benches!(mod unaligned_tail MEDIUM[..(MEDIUM.len() - 1)] $($name $arg $body)+);
benches!(mod unaligned_both MEDIUM[1..(MEDIUM.len() - 1)] $($name $arg $body)+);
@ -22,8 +24,7 @@ macro_rules! benches {
bencher.bytes = $input[$range].len() as u64;
let mut vec = $input.as_bytes().to_vec();
bencher.iter(|| {
black_box(&mut vec);
let $arg = black_box(&vec[$range]);
let $arg: &[u8] = &black_box(&mut vec)[$range];
black_box($body)
})
}