src/vendor/arrayvec/benches/extend.rs

   1
   2 extern crate arrayvec;
   3 #[macro_use] extern crate bencher;
   4
   5 use arrayvec::ArrayVec;
   6
   7 use bencher::Bencher;
   8
   9 fn extend_with_constant(b: &mut Bencher) {
  10     let mut v = ArrayVec::<[u8; 512]>::new();
  11     let cap = v.capacity();
  12     b.iter(|| {
  13         v.clear();
  14         v.extend((0..cap).map(|_| 1));
  15         v[0]
  16     });
  17     b.bytes = v.capacity() as u64;
  18 }
  19
  20 fn extend_with_range(b: &mut Bencher) {
  21     let mut v = ArrayVec::<[u8; 512]>::new();
  22     let cap = v.capacity();
  23     b.iter(|| {
  24         v.clear();
  25         v.extend((0..cap).map(|x| x as _));
  26         v[0]
  27     });
  28     b.bytes = v.capacity() as u64;
  29 }
  30
  31 fn extend_with_slice(b: &mut Bencher) {
  32     let mut v = ArrayVec::<[u8; 512]>::new();
  33     let data = [1; 512];
  34     b.iter(|| {
  35         v.clear();
  36         v.extend(data.iter().cloned());
  37         v[0]
  38     });
  39     b.bytes = v.capacity() as u64;
  40 }
  41
  42 benchmark_group!(benches, extend_with_constant, extend_with_range, extend_with_slice);
  43 benchmark_main!(benches);