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Benchmark for casting view to dict arrays (and the reverse) #5874

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Merged
merged 3 commits into from
Jun 12, 2024
Merged

Benchmark for casting view to dict arrays (and the reverse) #5874

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1467b78
add benchmark
XiangpengHao Jun 12, 2024
dd352a0
make clippy happy
XiangpengHao Jun 12, 2024
2cde0d6
move to arrow workspace
XiangpengHao Jun 12, 2024
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25 changes: 25 additions & 0 deletions arrow/benches/cast_kernels.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -114,6 +114,17 @@ fn build_decimal256_array(size: usize, precision: u8, scale: i8) -> ArrayRef {
)
}

fn build_dict_array(size: usize) -> ArrayRef {
let values = StringArray::from_iter([
Some("small"),
Some("larger string more than 12 bytes"),
None,
]);
let keys = UInt64Array::from_iter((0..size as u64).map(|v| v % 3));

Arc::new(DictionaryArray::new(keys, Arc::new(values)))
}

// cast array from specified primitive array type to desired data type
fn cast_array(array: &ArrayRef, to_type: DataType) {
criterion::black_box(cast(array, &to_type).unwrap());
Expand All @@ -138,6 +149,9 @@ fn add_benchmark(c: &mut Criterion) {
let decimal128_array = build_decimal128_array(512, 10, 3);
let decimal256_array = build_decimal256_array(512, 50, 3);

let dict_array = build_dict_array(10_000);
let string_view_array = cast(&dict_array, &DataType::Utf8View).unwrap();

c.bench_function("cast int32 to int32 512", |b| {
b.iter(|| cast_array(&i32_array, DataType::Int32))
});
Expand Down Expand Up @@ -237,6 +251,17 @@ fn add_benchmark(c: &mut Criterion) {
c.bench_function("cast decimal256 to decimal256 512 with same scale", |b| {
b.iter(|| cast_array(&decimal256_array, DataType::Decimal256(60, 3)))
});
c.bench_function("cast dict to string view", |b| {
b.iter(|| cast_array(&dict_array, DataType::Utf8View))
});
c.bench_function("cast string view to dict", |b| {
b.iter(|| {
cast_array(
&string_view_array,
DataType::Dictionary(Box::new(DataType::UInt64), Box::new(DataType::Utf8)),
)
})
});
}

criterion_group!(benches, add_benchmark);
Expand Down