alamb commented on code in PR #11987: URL: https://github.com/apache/datafusion/pull/11987#discussion_r1717566869
########## datafusion/functions/benches/pad.rs: ########## @@ -0,0 +1,141 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +use arrow::array::{ArrayRef, ArrowPrimitiveType, OffsetSizeTrait, PrimitiveArray}; +use arrow::datatypes::Int64Type; +use arrow::util::bench_util::{ + create_string_array_with_len, create_string_view_array_with_len, +}; +use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion}; +use datafusion_expr::ColumnarValue; +use datafusion_functions::unicode::{lpad, rpad}; +use rand::distributions::{Distribution, Uniform}; +use rand::Rng; +use std::sync::Arc; + +struct Filter<Dist> { + dist: Dist, +} + +impl<T, Dist> Distribution<T> for Filter<Dist> +where + Dist: Distribution<T>, +{ + fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> T { + self.dist.sample(rng) + } +} + +pub fn create_primitive_array<T>( + size: usize, + null_density: f32, + len: usize, +) -> PrimitiveArray<T> +where + T: ArrowPrimitiveType<Native = i64>, +{ + let dist = Filter { + dist: Uniform::new_inclusive::<i64, i64>(0, len as i64), + }; + + let mut rng = rand::thread_rng(); + (0..size) + .map(|_| { + if rng.gen::<f32>() < null_density { + None + } else { + Some(rng.sample(&dist)) + } + }) + .collect() +} + +fn create_args<O: OffsetSizeTrait>( + size: usize, + str_len: usize, + use_string_view: bool, +) -> Vec<ColumnarValue> { + let length_array = Arc::new(create_primitive_array::<Int64Type>(size, 0.0, str_len)); + + if !use_string_view { + let string_array = + Arc::new(create_string_array_with_len::<O>(size, 0.1, str_len)); + let fill_array = Arc::new(create_string_array_with_len::<O>(size, 0.1, str_len)); + + vec![ + ColumnarValue::Array(string_array), + ColumnarValue::Array(Arc::clone(&length_array) as ArrayRef), + ColumnarValue::Array(fill_array), + ] + } else { + let string_array = + Arc::new(create_string_view_array_with_len(size, 0.1, str_len, false)); + let fill_array = + Arc::new(create_string_view_array_with_len(size, 0.1, str_len, false)); + + vec![ + ColumnarValue::Array(string_array), + ColumnarValue::Array(Arc::clone(&length_array) as ArrayRef), + ColumnarValue::Array(fill_array), + ] + } +} + +fn criterion_benchmark(c: &mut Criterion) { + for size in [1024, 2048] { + let mut group = c.benchmark_group("lpad function"); + + let args = create_args::<i32>(size, 32, false); + group.bench_function(BenchmarkId::new("utf8 type", size), |b| { + b.iter(|| criterion::black_box(lpad().invoke(&args).unwrap())) + }); + + let args = create_args::<i64>(size, 32, false); + group.bench_function(BenchmarkId::new("largeutf8 type", size), |b| { + b.iter(|| criterion::black_box(lpad().invoke(&args).unwrap())) + }); + + let args = create_args::<i32>(size, 32, true); + group.bench_function(BenchmarkId::new("stringview type", size), |b| { + b.iter(|| criterion::black_box(lpad().invoke(&args).unwrap())) + }); + + group.finish(); + + let mut group = c.benchmark_group("rpad function"); + + let args = create_args::<i32>(size, 32, false); + group.bench_function(BenchmarkId::new("utf8 type", size), |b| { + b.iter(|| criterion::black_box(rpad().invoke(&args).unwrap())) + }); + + let args = create_args::<i64>(size, 32, false); + group.bench_function(BenchmarkId::new("largeutf8 type", size), |b| { + b.iter(|| criterion::black_box(rpad().invoke(&args).unwrap())) + }); + // Review Comment: Maybe we can make a follow on PR with cleaning up rpad and applying the same pattern. I filed https://github.com/apache/datafusion/issues/11997 to track that idea -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
