chgk_ledb/app/benches/db_bench.rs

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#[macro_use]
extern crate criterion;
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extern crate bincode;
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extern crate serde;
extern crate serde_derive;
extern crate serde_json;
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extern crate tempfile;
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use chgk_ledb_lib::db;
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use std::path::PathBuf;
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use db::{Reader, Writer, WriterOpts};
use criterion::{BatchSize, Criterion};
use tempfile::tempdir;
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use serde_derive::{Deserialize, Serialize};
#[derive(
bincode::Encode,
bincode::Decode,
Clone,
Debug,
PartialEq,
Eq,
PartialOrd,
Ord,
Serialize,
Deserialize,
)]
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struct TestData {
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num1: u64,
num2: u64,
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test: String,
}
const N: usize = 4096;
fn gen_data(count: usize) -> impl Iterator<Item = TestData> {
(0..count)
.into_iter()
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.map(|i| 143 + i as u64)
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.map(|i| TestData {
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num1: i,
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num2: i * 100 ^ 0xDF0E441122334455,
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test: "test ---- Test ____".repeat(123 + i as usize % 15),
})
}
fn prepare_db_writer(path: &PathBuf) -> Writer<TestData> {
let opts = WriterOpts {
compress_lvl: 1,
data_buf_size: 100 * 1024 * 1024,
out_buf_size: 100 * 1024 * 1024,
current_buf_size: 10240,
};
Writer::new(path, opts).expect("new writer")
}
fn db_read(c: &mut Criterion) {
let dir = tempdir().expect("tempdir");
let tmpfile = dir.path().join("test.tmp");
let mut writer = prepare_db_writer(&tmpfile);
let mut items_iter = gen_data(N).collect::<Vec<TestData>>().into_iter();
writer.load(&mut items_iter).unwrap();
writer.finish().unwrap();
c.bench_function("read", |b| {
b.iter_batched(
|| {
let reader: Reader<TestData> = Reader::new(&tmpfile, 2048).expect("new reader");
reader
},
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|reader| {
for item in reader {
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drop(item);
}
},
BatchSize::SmallInput,
)
});
}
fn db_write(c: &mut Criterion) {
let dir = tempdir().expect("tempdir");
let tmpfile = dir.path().join("test.tmp");
c.bench_function("write", |b| {
b.iter_batched(
|| {
let src = gen_data(N).collect::<Vec<TestData>>().into_iter();
let writer = prepare_db_writer(&tmpfile);
(src, writer)
},
|(mut src, mut writer)| {
writer.load(&mut src).unwrap();
writer.finish().unwrap();
},
BatchSize::SmallInput,
)
});
}
fn config() -> Criterion {
Criterion::default().sample_size(40)
}
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criterion_group! {name=benches; config = config(); targets = db_read, db_write}
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criterion_main!(benches);