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benchmark: add file reading benchmarks (#3013)
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Original file line number | Diff line number | Diff line change |
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#![cfg(unix)] | ||
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use tokio::stream::StreamExt; | ||
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use tokio::fs::File; | ||
use tokio::io::AsyncReadExt; | ||
use tokio_util::codec::{BytesCodec, FramedRead /*FramedWrite*/}; | ||
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use bencher::{benchmark_group, benchmark_main, Bencher}; | ||
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use std::fs::File as StdFile; | ||
use std::io::Read as StdRead; | ||
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fn rt() -> tokio::runtime::Runtime { | ||
tokio::runtime::Builder::new_multi_thread() | ||
.worker_threads(2) | ||
.build() | ||
.unwrap() | ||
} | ||
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const BLOCK_COUNT: usize = 1_000; | ||
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const BUFFER_SIZE: usize = 4096; | ||
const DEV_ZERO: &'static str = "/dev/zero"; | ||
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fn async_read_codec(b: &mut Bencher) { | ||
let rt = rt(); | ||
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b.iter(|| { | ||
let task = || async { | ||
let file = File::open(DEV_ZERO).await.unwrap(); | ||
let mut input_stream = FramedRead::with_capacity(file, BytesCodec::new(), BUFFER_SIZE); | ||
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for _i in 0..BLOCK_COUNT { | ||
let _bytes = input_stream.next().await.unwrap(); | ||
} | ||
}; | ||
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rt.block_on(task()); | ||
}); | ||
} | ||
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fn async_read_buf(b: &mut Bencher) { | ||
let rt = rt(); | ||
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b.iter(|| { | ||
let task = || async { | ||
let mut file = File::open(DEV_ZERO).await.unwrap(); | ||
let mut buffer = [0u8; BUFFER_SIZE]; | ||
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for _i in 0..BLOCK_COUNT { | ||
let count = file.read(&mut buffer).await.unwrap(); | ||
if count == 0 { | ||
break; | ||
} | ||
} | ||
}; | ||
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rt.block_on(task()); | ||
}); | ||
} | ||
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fn async_read_std_file(b: &mut Bencher) { | ||
let rt = rt(); | ||
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let task = || async { | ||
let mut file = tokio::task::block_in_place(|| Box::pin(StdFile::open(DEV_ZERO).unwrap())); | ||
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for _i in 0..BLOCK_COUNT { | ||
let mut buffer = [0u8; BUFFER_SIZE]; | ||
let mut file_ref = file.as_mut(); | ||
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tokio::task::block_in_place(move || { | ||
file_ref.read_exact(&mut buffer).unwrap(); | ||
}); | ||
} | ||
}; | ||
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b.iter(|| { | ||
rt.block_on(task()); | ||
}); | ||
} | ||
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fn sync_read(b: &mut Bencher) { | ||
b.iter(|| { | ||
let mut file = StdFile::open(DEV_ZERO).unwrap(); | ||
let mut buffer = [0u8; BUFFER_SIZE]; | ||
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for _i in 0..BLOCK_COUNT { | ||
file.read_exact(&mut buffer).unwrap(); | ||
} | ||
}); | ||
} | ||
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benchmark_group!( | ||
file, | ||
async_read_std_file, | ||
async_read_buf, | ||
async_read_codec, | ||
sync_read | ||
); | ||
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benchmark_main!(file); |