| // 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. |
| |
| //! Utils to make benchmarking easier |
| |
| use crate::array::*; |
| use crate::datatypes::*; |
| use crate::util::test_util::seedable_rng; |
| use rand::Rng; |
| use rand::SeedableRng; |
| use rand::{ |
| distributions::{Alphanumeric, Distribution, Standard}, |
| prelude::StdRng, |
| }; |
| |
| /// Creates an random (but fixed-seeded) array of a given size and null density |
| pub fn create_primitive_array<T>(size: usize, null_density: f32) -> PrimitiveArray<T> |
| where |
| T: ArrowPrimitiveType, |
| Standard: Distribution<T::Native>, |
| { |
| let mut rng = seedable_rng(); |
| |
| (0..size) |
| .map(|_| { |
| if rng.gen::<f32>() < null_density { |
| None |
| } else { |
| Some(rng.gen()) |
| } |
| }) |
| .collect() |
| } |
| |
| pub fn create_primitive_array_with_seed<T>( |
| size: usize, |
| null_density: f32, |
| seed: u64, |
| ) -> PrimitiveArray<T> |
| where |
| T: ArrowPrimitiveType, |
| Standard: Distribution<T::Native>, |
| { |
| let mut rng = StdRng::seed_from_u64(seed); |
| |
| (0..size) |
| .map(|_| { |
| if rng.gen::<f32>() < null_density { |
| None |
| } else { |
| Some(rng.gen()) |
| } |
| }) |
| .collect() |
| } |
| |
| /// Creates an random (but fixed-seeded) array of a given size and null density |
| pub fn create_boolean_array( |
| size: usize, |
| null_density: f32, |
| true_density: f32, |
| ) -> BooleanArray |
| where |
| Standard: Distribution<bool>, |
| { |
| let mut rng = seedable_rng(); |
| (0..size) |
| .map(|_| { |
| if rng.gen::<f32>() < null_density { |
| None |
| } else { |
| let value = rng.gen::<f32>() < true_density; |
| Some(value) |
| } |
| }) |
| .collect() |
| } |
| |
| /// Creates an random (but fixed-seeded) array of a given size and null density |
| pub fn create_string_array<Offset: StringOffsetSizeTrait>( |
| size: usize, |
| null_density: f32, |
| ) -> GenericStringArray<Offset> { |
| let rng = &mut seedable_rng(); |
| |
| (0..size) |
| .map(|_| { |
| if rng.gen::<f32>() < null_density { |
| None |
| } else { |
| let value = rng.sample_iter(&Alphanumeric).take(4).collect::<String>(); |
| Some(value) |
| } |
| }) |
| .collect() |
| } |
| |
| /// Creates an random (but fixed-seeded) binary array of a given size and null density |
| pub fn create_binary_array<Offset: BinaryOffsetSizeTrait>( |
| size: usize, |
| null_density: f32, |
| ) -> GenericBinaryArray<Offset> { |
| let rng = &mut seedable_rng(); |
| let range_rng = &mut seedable_rng(); |
| |
| (0..size) |
| .map(|_| { |
| if rng.gen::<f32>() < null_density { |
| None |
| } else { |
| let value = rng |
| .sample_iter::<u8, _>(Standard) |
| .take(range_rng.gen_range(0, 8)) |
| .collect::<Vec<u8>>(); |
| Some(value) |
| } |
| }) |
| .collect() |
| } |
| |
| /// Creates an random (but fixed-seeded) array of a given size and null density |
| pub fn create_fsb_array( |
| size: usize, |
| null_density: f32, |
| value_len: usize, |
| ) -> FixedSizeBinaryArray { |
| let rng = &mut seedable_rng(); |
| |
| FixedSizeBinaryArray::try_from_sparse_iter((0..size).map(|_| { |
| if rng.gen::<f32>() < null_density { |
| None |
| } else { |
| let value = rng |
| .sample_iter::<u8, _>(Standard) |
| .take(value_len) |
| .collect::<Vec<u8>>(); |
| Some(value) |
| } |
| })) |
| .unwrap() |
| } |