tustvold commented on code in PR #5317: URL: https://github.com/apache/arrow-rs/pull/5317#discussion_r1463591570
########## arrow/benches/json_writer.rs: ########## @@ -0,0 +1,188 @@ +// 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 criterion::*; + +use arrow::datatypes::*; +use arrow::util::bench_util::{ + create_primitive_array, create_string_array, create_string_array_with_len, + create_string_dict_array, +}; +use arrow::util::test_util::seedable_rng; +use arrow_array::{Array, ListArray, RecordBatch, StructArray}; +use arrow_buffer::{BooleanBuffer, NullBuffer, OffsetBuffer}; +use arrow_json::LineDelimitedWriter; +use rand::Rng; +use std::sync::Arc; + +const NUM_ROWS: usize = 65536; + +fn do_bench(c: &mut Criterion, name: &str, batch: &RecordBatch) { + c.bench_function(name, |b| { + b.iter(|| { + let mut out = Vec::with_capacity(1024); + LineDelimitedWriter::new(&mut out).write(batch).unwrap(); + out + }) + }); +} + +fn create_mixed(len: usize) -> RecordBatch { + let c1 = Arc::new(create_string_array::<i32>(len, 0.)); + let c2 = Arc::new(create_primitive_array::<Int32Type>(len, 0.)); + let c3 = Arc::new(create_primitive_array::<UInt32Type>(len, 0.)); + let c4 = Arc::new(create_string_array_with_len::<i32>(len, 0.2, 10)); + let c5 = Arc::new(create_string_array_with_len::<i32>(len, 0.2, 20)); + let c6 = Arc::new(create_primitive_array::<Float32Type>(len, 0.2)); + RecordBatch::try_from_iter([ + ("c1", c1 as _), + ("c2", c2 as _), + ("c3", c3 as _), + ("c4", c4 as _), + ("c5", c5 as _), + ("c6", c6 as _), + ]) + .unwrap() +} + +fn create_nulls(len: usize) -> NullBuffer { + let mut rng = seedable_rng(); + BooleanBuffer::from_iter((0..len).map(|_| rng.gen_bool(0.2))).into() +} + +fn create_offsets(len: usize) -> (usize, OffsetBuffer<i32>) { + let mut rng = seedable_rng(); + let mut last_offset = 0; + let mut offsets = Vec::with_capacity(len + 1); + offsets.push(0); + for _ in 0..len { + let len = rng.gen_range(0..10); + offsets.push(last_offset + len); + last_offset += len; + } + ( + *offsets.last().unwrap() as _, + OffsetBuffer::new(offsets.into()), + ) +} + +fn create_nullable_struct(len: usize) -> StructArray { + let c2 = StructArray::from(create_mixed(len)); + StructArray::new( + c2.fields().clone(), + c2.columns().to_vec(), + Some(create_nulls(c2.len())), + ) +} + +fn bench_primitive(c: &mut Criterion) { + let c1 = Arc::new(create_primitive_array::<Float32Type>(NUM_ROWS, 0.)); Review Comment: Habit, this is a good shout as float formatting is much more complex for JSON -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
