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Auto merge of #75060 - JohnTitor:rollup-aq8sfxf, r=JohnTitor
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Rollup of 10 pull requests

Successful merges:

 - #74686 (BTreeMap: remove into_slices and its unsafe block)
 - #74762 (BTreeMap::drain_filter should not touch the root during iteration)
 - #74781 (Clean up E0733 explanation)
 - #74874 (BTreeMap: define forget_type only when relevant)
 - #74974 (Make tests faster in Miri)
 - #75010 (Update elasticlunr-rs and ammonia transitive deps)
 - #75041 (Replaced log with tracing crate)
 - #75044 (Clean up E0744 explanation)
 - #75054 (Rename rustc_middle::cstore::DepKind to CrateDepKind)
 - #75057 (Avoid dumping rustc invocations to stdout)

Failed merges:

 - #74827 (Move bulk of BTreeMap::insert method down to new method on handle)

r? @ghost
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@bors
bors committed Aug 2, 2020
2 parents e8876ae + 50f2b5d commit a99ae95
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355 changes: 140 additions & 215 deletions Cargo.lock
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302 changes: 302 additions & 0 deletions library/alloc/benches/btree/map.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -282,3 +282,305 @@ pub fn iter_10k(b: &mut Bencher) {
pub fn iter_1m(b: &mut Bencher) {
bench_iter(b, 1_000, 1_000_000);
}

const FAT: usize = 256;

// The returned map has small keys and values.
// Benchmarks on it have a counterpart in set.rs with the same keys and no values at all.
fn slim_map(n: usize) -> BTreeMap<usize, usize> {
(0..n).map(|i| (i, i)).collect::<BTreeMap<_, _>>()
}

// The returned map has small keys and large values.
fn fat_val_map(n: usize) -> BTreeMap<usize, [usize; FAT]> {
(0..n).map(|i| (i, [i; FAT])).collect::<BTreeMap<_, _>>()
}

// The returned map has large keys and values.
fn fat_map(n: usize) -> BTreeMap<[usize; FAT], [usize; FAT]> {
(0..n).map(|i| ([i; FAT], [i; FAT])).collect::<BTreeMap<_, _>>()
}

#[bench]
pub fn clone_slim_100(b: &mut Bencher) {
let src = slim_map(100);
b.iter(|| src.clone())
}

#[bench]
pub fn clone_slim_100_and_clear(b: &mut Bencher) {
let src = slim_map(100);
b.iter(|| src.clone().clear())
}

#[bench]
pub fn clone_slim_100_and_drain_all(b: &mut Bencher) {
let src = slim_map(100);
b.iter(|| src.clone().drain_filter(|_, _| true).count())
}

#[bench]
pub fn clone_slim_100_and_drain_half(b: &mut Bencher) {
let src = slim_map(100);
b.iter(|| {
let mut map = src.clone();
assert_eq!(map.drain_filter(|i, _| i % 2 == 0).count(), 100 / 2);
assert_eq!(map.len(), 100 / 2);
})
}

#[bench]
pub fn clone_slim_100_and_into_iter(b: &mut Bencher) {
let src = slim_map(100);
b.iter(|| src.clone().into_iter().count())
}

#[bench]
pub fn clone_slim_100_and_pop_all(b: &mut Bencher) {
let src = slim_map(100);
b.iter(|| {
let mut map = src.clone();
while map.pop_first().is_some() {}
map
});
}

#[bench]
pub fn clone_slim_100_and_remove_all(b: &mut Bencher) {
let src = slim_map(100);
b.iter(|| {
let mut map = src.clone();
while let Some(elt) = map.iter().map(|(&i, _)| i).next() {
let v = map.remove(&elt);
debug_assert!(v.is_some());
}
map
});
}

#[bench]
pub fn clone_slim_100_and_remove_half(b: &mut Bencher) {
let src = slim_map(100);
b.iter(|| {
let mut map = src.clone();
for i in (0..100).step_by(2) {
let v = map.remove(&i);
debug_assert!(v.is_some());
}
assert_eq!(map.len(), 100 / 2);
map
})
}

#[bench]
pub fn clone_slim_10k(b: &mut Bencher) {
let src = slim_map(10_000);
b.iter(|| src.clone())
}

#[bench]
pub fn clone_slim_10k_and_clear(b: &mut Bencher) {
let src = slim_map(10_000);
b.iter(|| src.clone().clear())
}

#[bench]
pub fn clone_slim_10k_and_drain_all(b: &mut Bencher) {
let src = slim_map(10_000);
b.iter(|| src.clone().drain_filter(|_, _| true).count())
}

#[bench]
pub fn clone_slim_10k_and_drain_half(b: &mut Bencher) {
let src = slim_map(10_000);
b.iter(|| {
let mut map = src.clone();
assert_eq!(map.drain_filter(|i, _| i % 2 == 0).count(), 10_000 / 2);
assert_eq!(map.len(), 10_000 / 2);
})
}

#[bench]
pub fn clone_slim_10k_and_into_iter(b: &mut Bencher) {
let src = slim_map(10_000);
b.iter(|| src.clone().into_iter().count())
}

#[bench]
pub fn clone_slim_10k_and_pop_all(b: &mut Bencher) {
let src = slim_map(10_000);
b.iter(|| {
let mut map = src.clone();
while map.pop_first().is_some() {}
map
});
}

#[bench]
pub fn clone_slim_10k_and_remove_all(b: &mut Bencher) {
let src = slim_map(10_000);
b.iter(|| {
let mut map = src.clone();
while let Some(elt) = map.iter().map(|(&i, _)| i).next() {
let v = map.remove(&elt);
debug_assert!(v.is_some());
}
map
});
}

#[bench]
pub fn clone_slim_10k_and_remove_half(b: &mut Bencher) {
let src = slim_map(10_000);
b.iter(|| {
let mut map = src.clone();
for i in (0..10_000).step_by(2) {
let v = map.remove(&i);
debug_assert!(v.is_some());
}
assert_eq!(map.len(), 10_000 / 2);
map
})
}

#[bench]
pub fn clone_fat_val_100(b: &mut Bencher) {
let src = fat_val_map(100);
b.iter(|| src.clone())
}

#[bench]
pub fn clone_fat_val_100_and_clear(b: &mut Bencher) {
let src = fat_val_map(100);
b.iter(|| src.clone().clear())
}

#[bench]
pub fn clone_fat_val_100_and_drain_all(b: &mut Bencher) {
let src = fat_val_map(100);
b.iter(|| src.clone().drain_filter(|_, _| true).count())
}

#[bench]
pub fn clone_fat_val_100_and_drain_half(b: &mut Bencher) {
let src = fat_val_map(100);
b.iter(|| {
let mut map = src.clone();
assert_eq!(map.drain_filter(|i, _| i % 2 == 0).count(), 100 / 2);
assert_eq!(map.len(), 100 / 2);
})
}

#[bench]
pub fn clone_fat_val_100_and_into_iter(b: &mut Bencher) {
let src = fat_val_map(100);
b.iter(|| src.clone().into_iter().count())
}

#[bench]
pub fn clone_fat_val_100_and_pop_all(b: &mut Bencher) {
let src = fat_val_map(100);
b.iter(|| {
let mut map = src.clone();
while map.pop_first().is_some() {}
map
});
}

#[bench]
pub fn clone_fat_val_100_and_remove_all(b: &mut Bencher) {
let src = fat_val_map(100);
b.iter(|| {
let mut map = src.clone();
while let Some(elt) = map.iter().map(|(&i, _)| i).next() {
let v = map.remove(&elt);
debug_assert!(v.is_some());
}
map
});
}

#[bench]
pub fn clone_fat_val_100_and_remove_half(b: &mut Bencher) {
let src = fat_val_map(100);
b.iter(|| {
let mut map = src.clone();
for i in (0..100).step_by(2) {
let v = map.remove(&i);
debug_assert!(v.is_some());
}
assert_eq!(map.len(), 100 / 2);
map
})
}

#[bench]
pub fn clone_fat_100(b: &mut Bencher) {
let src = fat_map(100);
b.iter(|| src.clone())
}

#[bench]
pub fn clone_fat_100_and_clear(b: &mut Bencher) {
let src = fat_map(100);
b.iter(|| src.clone().clear())
}

#[bench]
pub fn clone_fat_100_and_drain_all(b: &mut Bencher) {
let src = fat_map(100);
b.iter(|| src.clone().drain_filter(|_, _| true).count())
}

#[bench]
pub fn clone_fat_100_and_drain_half(b: &mut Bencher) {
let src = fat_map(100);
b.iter(|| {
let mut map = src.clone();
assert_eq!(map.drain_filter(|i, _| i[0] % 2 == 0).count(), 100 / 2);
assert_eq!(map.len(), 100 / 2);
})
}

#[bench]
pub fn clone_fat_100_and_into_iter(b: &mut Bencher) {
let src = fat_map(100);
b.iter(|| src.clone().into_iter().count())
}

#[bench]
pub fn clone_fat_100_and_pop_all(b: &mut Bencher) {
let src = fat_map(100);
b.iter(|| {
let mut map = src.clone();
while map.pop_first().is_some() {}
map
});
}

#[bench]
pub fn clone_fat_100_and_remove_all(b: &mut Bencher) {
let src = fat_map(100);
b.iter(|| {
let mut map = src.clone();
while let Some(elt) = map.iter().map(|(&i, _)| i).next() {
let v = map.remove(&elt);
debug_assert!(v.is_some());
}
map
});
}

#[bench]
pub fn clone_fat_100_and_remove_half(b: &mut Bencher) {
let src = fat_map(100);
b.iter(|| {
let mut map = src.clone();
for i in (0..100).step_by(2) {
let v = map.remove(&[i; FAT]);
debug_assert!(v.is_some());
}
assert_eq!(map.len(), 100 / 2);
map
})
}
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