Benchmark: Jeff's string vs arrays

Script Preparation code:

function splitGroups({
    howManyPeople,
    maxMembersPerGroup
}) {
    const maxGroups = Math.ceil(howManyPeople / maxMembersPerGroup)
    const minPeoplePerGroup = Math.floor(howManyPeople / maxGroups)
    const peoplePerGroup = Array.from({
        length: maxGroups
    }).fill(
        minPeoplePerGroup
    )
    const remainingPeople = howManyPeople - minPeoplePerGroup * maxGroups
    return peoplePerGroup.map((initialQty, index) => {
        if (index < remainingPeople) return initialQty + 1
        return initialQty
    })
}


const repeat = ({ value, times }) => value.toString().concat(',').repeat(times)
const removeLastChar = (value) => value.slice(0, -1)
function splitGroupsSTR({ howManyPeople, maxMembersPerGroup }) {
    const groups = Math.ceil(howManyPeople / maxMembersPerGroup)

    const minPeoplePerGroup = Math.floor(howManyPeople / groups)
    const groupsWithMorePeople = howManyPeople - minPeoplePerGroup * groups
    const smallerGroups = repeat({
        value: minPeoplePerGroup,
        times: groups - groupsWithMorePeople,
    })
    if (!groupsWithMorePeople) return removeLastChar(smallerGroups)
    const largerGroups = repeat({
        value: minPeoplePerGroup + 1,
        times: groupsWithMorePeople,
    })
    return largerGroups + removeLastChar(smallerGroups)
}

Tests:

Array
splitGroups({howManyPeople: 10000000, maxMembersPerGroup: 3}) splitGroups({howManyPeople: 100, maxMembersPerGroup: 3}) splitGroups({howManyPeople: 10, maxMembersPerGroup: 3})
String
splitGroupsSTR({howManyPeople: 10000000, maxMembersPerGroup: 3}) splitGroupsSTR({howManyPeople: 100, maxMembersPerGroup: 3}) splitGroupsSTR({howManyPeople: 10, maxMembersPerGroup: 3})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array
String

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks and explore what's being tested in this specific benchmark.

**Benchmark Overview**

The benchmark, "Jeff's string vs arrays", measures the performance difference between two approaches to group people by size: using an array or converting a number to a string. The test cases are designed to stress different aspects of these implementations, allowing users to compare their performance under various conditions.

**Benchmark Definition JSON**

The `Script Preparation Code` section defines two functions:

1. `splitGroups({ howManyPeople, maxMembersPerGroup })`: This function takes an object with `howManyPeople` and `maxMembersPerGroup` properties, calculates the number of groups needed, and then creates an array of people per group.
2. `splitGroupsSTR({ howManyPeople, maxMembersPerGroup })`: This function is similar to the first one but uses string manipulation instead of arrays.

The `Test Name` field specifies that there are two test cases:

* "Array": Runs the `splitGroups` function with different input values.
* "String": Runs the `splitGroupsSTR` function with different input values.

**Options Compared**

The benchmark compares two options:

1. **Array-based approach**: Uses arrays to store people per group, as in the `splitGroups` function.
2. **String-based approach**: Converts numbers to strings to create groups, as in the `splitGroupsSTR` function.

**Pros and Cons of Each Approach**

* **Array-based approach**:
	+ Pros: Efficient use of memory, fast indexing, and direct manipulation of arrays.
	+ Cons: May lead to slower string creation and concatenation operations.
* **String-based approach**:
	+ Pros: Can be faster for certain string manipulation tasks and may have better cache locality.
	+ Cons: Requires more memory allocations, slower string creation, and potentially more complex indexing.

**Library Usage**

There is no explicit library usage in this benchmark. However, the `repeat` function creates a repeated string using the `concat` method, which is a built-in JavaScript method for concatenating strings. The `slice` method is used to remove the last character from the resulting string.

**Special JS Features or Syntax**

No special JavaScript features or syntax are explicitly mentioned in this benchmark. However, the use of template literals (e.g., `value.toString().concat(',')`) and array methods (e.g., `fill`, `map`) showcase modern JavaScript programming practices.

**Other Alternatives**

If you're interested in exploring alternative approaches to grouping people by size, consider:

* Using a library like Lodash or Ramda for functional programming and data manipulation.
* Implementing a custom sorting algorithm using quicksort or mergesort.
* Utilizing web workers or parallel processing for concurrent execution of the grouping task.

Keep in mind that these alternatives may have varying performance characteristics depending on your specific use case and requirements.

Related benchmarks:

Jeff's string vs arrays (version: 0)

Comparing performance of: Array vs String

Created: 3 years ago by: Guest

Jump to the latest result

Array

String

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):