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rust/src/libstd/io
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bors 66e1f11ef4 auto merge of #15471 : erickt/rust/push_all, r=acrichto 
llvm is currently not able to conver `Vec::extend` into a memcpy for `Copy` types, which results in methods like `Vec::push_all` to run twice as slow as it should be running. This patch takes the unsafe `Vec::clone` optimization to speed up all the operations that are cloning a slice into a `Vec`.

before:

```
test vec::tests::bench_clone_from_0000_0000                ... bench:        12 ns/iter (+/- 2)
test vec::tests::bench_clone_from_0000_0010                ... bench:       125 ns/iter (+/- 4) = 80 MB/s
test vec::tests::bench_clone_from_0000_0100                ... bench:       360 ns/iter (+/- 33) = 277 MB/s
test vec::tests::bench_clone_from_0000_1000                ... bench:      2601 ns/iter (+/- 175) = 384 MB/s
test vec::tests::bench_clone_from_0010_0000                ... bench:        12 ns/iter (+/- 2)
test vec::tests::bench_clone_from_0010_0010                ... bench:       125 ns/iter (+/- 10) = 80 MB/s
test vec::tests::bench_clone_from_0010_0100                ... bench:       361 ns/iter (+/- 28) = 277 MB/s
test vec::tests::bench_clone_from_0100_0010                ... bench:       131 ns/iter (+/- 13) = 76 MB/s
test vec::tests::bench_clone_from_0100_0100                ... bench:       360 ns/iter (+/- 9) = 277 MB/s
test vec::tests::bench_clone_from_0100_1000                ... bench:      2575 ns/iter (+/- 168) = 388 MB/s
test vec::tests::bench_clone_from_1000_0100                ... bench:       356 ns/iter (+/- 20) = 280 MB/s
test vec::tests::bench_clone_from_1000_1000                ... bench:      2605 ns/iter (+/- 167) = 383 MB/s
test vec::tests::bench_from_slice_0000                     ... bench:        11 ns/iter (+/- 0)
test vec::tests::bench_from_slice_0010                     ... bench:       115 ns/iter (+/- 5) = 86 MB/s
test vec::tests::bench_from_slice_0100                     ... bench:       309 ns/iter (+/- 170) = 323 MB/s
test vec::tests::bench_from_slice_1000                     ... bench:      2065 ns/iter (+/- 198) = 484 MB/s
test vec::tests::bench_push_all_0000_0000                  ... bench:         7 ns/iter (+/- 0)
test vec::tests::bench_push_all_0000_0010                  ... bench:        79 ns/iter (+/- 7) = 126 MB/s
test vec::tests::bench_push_all_0000_0100                  ... bench:       342 ns/iter (+/- 18) = 292 MB/s
test vec::tests::bench_push_all_0000_1000                  ... bench:      2873 ns/iter (+/- 75) = 348 MB/s
test vec::tests::bench_push_all_0010_0010                  ... bench:       154 ns/iter (+/- 8) = 64 MB/s
test vec::tests::bench_push_all_0100_0100                  ... bench:       518 ns/iter (+/- 18) = 193 MB/s
test vec::tests::bench_push_all_1000_1000                  ... bench:      4490 ns/iter (+/- 223) = 222 MB/s
```

after:

```
test vec::tests::bench_clone_from_0000_0000                ... bench:        12 ns/iter (+/- 1)
test vec::tests::bench_clone_from_0000_0010                ... bench:       123 ns/iter (+/- 5) = 81 MB/s
test vec::tests::bench_clone_from_0000_0100                ... bench:       367 ns/iter (+/- 23) = 272 MB/s
test vec::tests::bench_clone_from_0000_1000                ... bench:      2618 ns/iter (+/- 252) = 381 MB/s
test vec::tests::bench_clone_from_0010_0000                ... bench:        12 ns/iter (+/- 1)
test vec::tests::bench_clone_from_0010_0010                ... bench:       124 ns/iter (+/- 7) = 80 MB/s
test vec::tests::bench_clone_from_0010_0100                ... bench:       369 ns/iter (+/- 34) = 271 MB/s
test vec::tests::bench_clone_from_0100_0010                ... bench:       123 ns/iter (+/- 6) = 81 MB/s
test vec::tests::bench_clone_from_0100_0100                ... bench:       371 ns/iter (+/- 25) = 269 MB/s
test vec::tests::bench_clone_from_0100_1000                ... bench:      2713 ns/iter (+/- 532) = 368 MB/s
test vec::tests::bench_clone_from_1000_0100                ... bench:       369 ns/iter (+/- 14) = 271 MB/s
test vec::tests::bench_clone_from_1000_1000                ... bench:      2611 ns/iter (+/- 194) = 382 MB/s
test vec::tests::bench_from_slice_0000                     ... bench:         7 ns/iter (+/- 0)
test vec::tests::bench_from_slice_0010                     ... bench:       108 ns/iter (+/- 4) = 92 MB/s
test vec::tests::bench_from_slice_0100                     ... bench:       235 ns/iter (+/- 24) = 425 MB/s
test vec::tests::bench_from_slice_1000                     ... bench:      1318 ns/iter (+/- 96) = 758 MB/s
test vec::tests::bench_push_all_0000_0000                  ... bench:         7 ns/iter (+/- 0)
test vec::tests::bench_push_all_0000_0010                  ... bench:        70 ns/iter (+/- 4) = 142 MB/s
test vec::tests::bench_push_all_0000_0100                  ... bench:       176 ns/iter (+/- 16) = 568 MB/s
test vec::tests::bench_push_all_0000_1000                  ... bench:      1125 ns/iter (+/- 94) = 888 MB/s
test vec::tests::bench_push_all_0010_0010                  ... bench:       159 ns/iter (+/- 15) = 62 MB/s
test vec::tests::bench_push_all_0100_0100                  ... bench:       363 ns/iter (+/- 12) = 275 MB/s
test vec::tests::bench_push_all_1000_1000                  ... bench:      2860 ns/iter (+/- 415) = 349 MB/s
```

This also includes extra benchmarks for `Vec` and `MemWriter`.
2014-07-09 20:21:29 +00:00
..
net
std: Rename the ToStr trait to ToString, and to_str to to_string.
2014-07-08 13:01:43 -07:00
buffered.rs
Deprecate the bytes!() macro.
2014-06-18 17:02:22 -07:00
comm_adapters.rs
librustc: Match trait self types exactly.
2014-06-28 11:18:37 -07:00
extensions.rs
make any_pat! and u64_from_be_bytes_bench_impl! macros hygienic
2014-07-04 13:20:14 -07:00
fs.rs
std: Rename the ToStr trait to ToString, and to_str to to_string.
2014-07-08 13:01:43 -07:00
mem.rs
auto merge of #15471 : erickt/rust/push_all, r=acrichto
2014-07-09 20:21:29 +00:00
mod.rs
auto merge of #15283 : kwantam/rust/master, r=alexcrichton
2014-07-09 18:36:30 +00:00
pipe.rs
Deprecate the bytes!() macro.
2014-06-18 17:02:22 -07:00
process.rs
std: Rename the ToStr trait to ToString, and to_str to to_string.
2014-07-08 13:01:43 -07:00
result.rs
De-~[] Mem{Reader,Writer}
2014-04-06 15:40:01 -07:00
signal.rs
Register new snapshots
2014-06-15 23:30:24 -07:00
stdio.rs
std: Rename the ToStr trait to ToString, and to_str to to_string.
2014-07-08 13:01:43 -07:00
tempfile.rs
std: Remove format_strbuf!()
2014-05-28 08:35:41 -07:00
test.rs
Rename all raw pointers as necessary
2014-06-28 11:53:58 -07:00
timer.rs
std::io: Use re-exported pathes in examples.
2014-06-27 07:10:33 +09:00
util.rs
std: Rename the ToStr trait to ToString, and to_str to to_string.
2014-07-08 13:01:43 -07:00