zebsme commented on code in PR #15454: URL: https://github.com/apache/datafusion/pull/15454#discussion_r2016735040
########## datafusion/physical-plan/benches/read_spill.rs: ########## @@ -0,0 +1,157 @@ +// 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::{ + Date32Builder, Decimal128Builder, Int32Builder, RecordBatch, StringBuilder, +}; +use arrow::datatypes::{DataType, Field, Schema}; +use arrow::ipc::reader::StreamReader; +use arrow::ipc::writer::StreamWriter; +use criterion::{criterion_group, criterion_main, BatchSize, BenchmarkId, Criterion}; +use datafusion_common::{exec_datafusion_err, Result}; +use std::fs::File; +use std::path::Path; +use std::sync::mpsc::{channel, Sender}; +use std::sync::Arc; +use std::thread; +use tempfile::NamedTempFile; + +fn create_batch(num_rows: usize, allow_nulls: bool) -> RecordBatch { + let schema = Arc::new(Schema::new(vec![ + Field::new("c0", DataType::Int32, true), + Field::new("c1", DataType::Utf8, true), + Field::new("c2", DataType::Date32, true), + Field::new("c3", DataType::Decimal128(11, 2), true), + ])); + + let mut a = Int32Builder::new(); + let mut b = StringBuilder::new(); + let mut c = Date32Builder::new(); + let mut d = Decimal128Builder::new() + .with_precision_and_scale(11, 2) + .unwrap(); + + for i in 0..num_rows { + a.append_value(i as i32); + c.append_value(i as i32); + d.append_value((i * 1000000) as i128); + if allow_nulls && i % 10 == 0 { + b.append_null(); + } else { + b.append_value(format!("this is string number {i}")); + } + } + + let a = a.finish(); + let b = b.finish(); + let c = c.finish(); + let d = d.finish(); + + RecordBatch::try_new( + schema.clone(), + vec![Arc::new(a), Arc::new(b), Arc::new(c), Arc::new(d)], + ) + .unwrap() +} + +/// Return a temporary file that contains an IPC file with 100 [`RecordBatch`]es +fn ipc_file() -> NamedTempFile { + let mut file = NamedTempFile::new().unwrap(); + let batch = create_batch(8192, true); + let mut writer = + StreamWriter::try_new(file.as_file_mut(), batch.schema().as_ref()).unwrap(); + for _ in 0..100 { + writer.write(&batch).unwrap(); + } + writer.finish().unwrap(); + file +} + +fn bench_spill_read(c: &mut Criterion) { + let file = ipc_file(); + let path = file.path(); + + let mut group = c.benchmark_group("read_spill"); + + let benches = &[ + ( + "StreamReader/read_100/with_validation", + read_spill as fn(_, _) -> _, + ), + ( + "StreamReader/read_100/skip_validation", + read_spill_skip_validation, + ), + ]; + + for &(name, func) in benches { + group.bench_with_input(BenchmarkId::new(name, ""), &path, |b, path| { + b.iter_batched( + // Setup phase: Create fresh state for each benchmark iteration. + // - A channel to send/receive RecordBatch results between threads. + // - A background thread to consume received RecordBatches. + // This ensures each iteration starts with clean resources. + || { + let (sender, receiver) = channel::<Result<RecordBatch>>(); + let join_handle = thread::spawn(move || { + while let Ok(batch) = receiver.recv() { + let _ = batch.unwrap(); + } + }); + (sender, join_handle) + }, + // Benchmark phase: + // - Execute the target function to send batches via the channel + // - Wait for the consumer thread to finish processing + |(sender, join_handle)| { + func(sender, path).unwrap(); + join_handle.join().unwrap(); + }, + BatchSize::LargeInput, + ) + }); + } + + group.finish(); +} +criterion_group!(benches, bench_spill_read); +criterion_main!(benches); + +fn read_spill(sender: Sender<Result<RecordBatch>>, path: &Path) -> Result<()> { Review Comment: Thank you so much for the review, I'll do this in the pr. -- 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
