function chunks_yield(array, size) {
function* chunk(arr, n) {
for (let i = 0; i < arr.length; i += n) {
yield arr.slice(i, i + n);
}
}
return [chunk(array, size)];
}
function chunks(arr, n) {
return arr.reduce((chunk, val) => {
if (chunk[chunk.length - 1].length === n)
chunk.push([]);
chunk[chunk.length - 1].push(val);
return chunk;
}, [
[]
]);
}
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
chunks_yield | |
chunks_perf |
Test name | Executions per second |
---|---|
chunks_yield | 1004751744.0 Ops/sec |
chunks_perf | 1009620288.0 Ops/sec |
Let's break down the provided benchmark and explain what's being tested, compared, and discussed.
Benchmark Overview
MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark in question consists of two test cases: chunks_yield
and chunks_perf
. These test cases are designed to measure the performance of two different approaches for chunking an array of elements into smaller, fixed-size chunks.
Chunking Approaches
There are two main approaches being compared:
chunks_yield
) that yields individual chunks of the array at a time. The idea is to generate each chunk on demand, allowing for more efficient use of resources and potentially better performance.chunks_perf
) that batches elements into chunks of a fixed size. The idea is to process all elements in batches, which can lead to cache-friendlier access patterns.Comparison
The two approaches have different pros and cons:
Library Used
There is no explicit library mentioned in the benchmark definition or test cases. However, it's likely that these functions are part of a standard JavaScript implementation or a custom implementation.
JavaScript Features/Syntax
The yield
keyword is used in both test cases to indicate that the function is a generator. This feature allows the function to produce a series of values over time, rather than computing them all at once and returning them in an array.
Other Alternatives
There are other approaches to chunking arrays that could be compared in a benchmark, such as:
Array.prototype.slice()
with a step sizeArray.prototype.reduce()
without the chunking approachHowever, these alternatives would likely require additional modifications to the test cases and benchmark setup.
Overall, this benchmark provides a useful comparison of two different approaches to chunking arrays in JavaScript. By understanding the pros and cons of each approach, developers can make informed decisions about which method is best suited for their specific use case.