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| author | bors <bors@rust-lang.org> | 2014-07-30 14:41:18 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2014-07-30 14:41:18 +0000 |
| commit | f6814206247d20a523e3cb1def5dad704c019cb1 (patch) | |
| tree | a0f5a9ea1ecd58610d84feca3fff3bd0043990f3 /src/rustllvm/RustWrapper.cpp | |
| parent | 3ab170ffc5e45d31eef85db8fd7a3b68764f77c2 (diff) | |
| parent | 2bcb4bd40624d9684829ab3b48767d1b6ee88380 (diff) | |
| download | rust-f6814206247d20a523e3cb1def5dad704c019cb1.tar.gz rust-f6814206247d20a523e3cb1def5dad704c019cb1.zip | |
auto merge of #15915 : erickt/rust/master, r=alexcrichton
std: rename MemWriter to SeekableMemWriter, add seekless MemWriter Not all users of MemWriter need to seek, but having MemWriter seekable adds between 3-29% in overhead in certain circumstances. This fixes that performance gap by making a non-seekable MemWriter, and creating a new SeekableMemWriter for those circumstances when that functionality is actually needed. ``` test io::mem::test::bench_buf_reader ... bench: 682 ns/iter (+/- 85) test io::mem::test::bench_buf_writer ... bench: 580 ns/iter (+/- 57) test io::mem::test::bench_mem_reader ... bench: 793 ns/iter (+/- 99) test io::mem::test::bench_mem_writer_001_0000 ... bench: 48 ns/iter (+/- 27) test io::mem::test::bench_mem_writer_001_0010 ... bench: 65 ns/iter (+/- 27) = 153 MB/s test io::mem::test::bench_mem_writer_001_0100 ... bench: 132 ns/iter (+/- 12) = 757 MB/s test io::mem::test::bench_mem_writer_001_1000 ... bench: 802 ns/iter (+/- 151) = 1246 MB/s test io::mem::test::bench_mem_writer_100_0000 ... bench: 481 ns/iter (+/- 28) test io::mem::test::bench_mem_writer_100_0010 ... bench: 1957 ns/iter (+/- 126) = 510 MB/s test io::mem::test::bench_mem_writer_100_0100 ... bench: 8222 ns/iter (+/- 434) = 1216 MB/s test io::mem::test::bench_mem_writer_100_1000 ... bench: 82496 ns/iter (+/- 11191) = 1212 MB/s test io::mem::test::bench_seekable_mem_writer_001_0000 ... bench: 48 ns/iter (+/- 2) test io::mem::test::bench_seekable_mem_writer_001_0010 ... bench: 64 ns/iter (+/- 2) = 156 MB/s test io::mem::test::bench_seekable_mem_writer_001_0100 ... bench: 129 ns/iter (+/- 7) = 775 MB/s test io::mem::test::bench_seekable_mem_writer_001_1000 ... bench: 801 ns/iter (+/- 159) = 1248 MB/s test io::mem::test::bench_seekable_mem_writer_100_0000 ... bench: 711 ns/iter (+/- 51) test io::mem::test::bench_seekable_mem_writer_100_0010 ... bench: 2532 ns/iter (+/- 227) = 394 MB/s test io::mem::test::bench_seekable_mem_writer_100_0100 ... bench: 8962 ns/iter (+/- 947) = 1115 MB/s test io::mem::test::bench_seekable_mem_writer_100_1000 ... bench: 85086 ns/iter (+/- 11555) = 1175 MB/s ```
Diffstat (limited to 'src/rustllvm/RustWrapper.cpp')
0 files changed, 0 insertions, 0 deletions