Benchmark: Print nested objects by a property

Script Preparation code:

// nested property "manager"
var testInput = [{
        name: "Enrique",
        manager: null,
        title: "CEO"
    },
    {
        name: "Connor",
        manager: "Enrique",
        title: "Engineer"
    },
    {
        name: "Ben",
        manager: "Enrique",
        title: "Engineer"
    },
    {
        name: "Jeffrey",
        manager: "Enrique",
        title: "Designer"
    },
    {
        name: "Lisa",
        manager: null,
        title: "COO"
    },
    {
        name: "Dan",
        manager: "Lisa",
        title: "Sales Manager"
    },
    {
        name: "Hannah",
        manager: "Dan",
        title: "Sales"
    },
    {
        name: "Justin",
        manager: "Dan",
        title: "Sales"
    },
    {
        name: "Lauren",
        manager: "Lisa",
        title: "Customer Success"
    },
];

function orgChart(list) {
    for (let i = 0; i < list.length; i++) {
        const member = list[i]
        if (!member.manager) {
            console.log(getText(member))
            // solve the last two console logs
            // I only need getParent with top managers
            // that reduces iterations
            getParent(list, member)
        }

    }
}

function getParent(list, member, nestLevel = 1) {
    for (let m = 0; m < list.length; m++) {
        const position = list[m]
        if (position.manager === member.name) {
            console.log(' '.repeat(4 * nestLevel) + getText(position))
            getParent(list, position, nestLevel + 1)
        }
    }
}

function getText(member) {
    return `${member.name} ( ${member.title} )`
}

function orgChartImproved(list) {
    const managers = {}
    for (let i = 0; i < list.length; i++) {
        const member = list[i]
        if (member.manager) {
            if (!managers[member.manager]) {
                managers[member.manager] = []
            }
            managers[member.manager].push(i)
        }
    }

    for (let i = 0; i < list.length; i++) {
        const member = list[i]
        if (!member.manager) {
            console.log(getText(member))
            findNested(member, list, managers)
        }
    }
}

function findNested(member, data, managers, level = 1) {
    const nestedList = managers[member.name]
    if (nestedList) {
        nestedList.forEach((memberIdx) => {
            const member = data[memberIdx]
            console.log(' '.repeat(4 * level), getText(member))
            findNested(member, data, managers, level + 1)
        })
    }
}

Tests:

orgChart() Test
orgChart(testInput)
orgChartImproved() Test
orgChartImproved(testInput)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
orgChart() Test
orgChartImproved() Test

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

**What is being tested?**

The provided JSON represents two JavaScript microbenchmarks, `orgChart()` and `orgChartImproved()`, which test different approaches to printing nested objects by a property.

In the benchmark definition, the script preparation code contains an array of objects representing a company hierarchy, where each object has a `name` property, a `manager` property, and a `title` property. The task is to print the names and titles of all employees without direct managers (i.e., employees with no `manager` property).

**Options being compared**

The two benchmark functions compare different approaches to solving this problem:

1. **orgChart()**: This function uses a simple iterative approach, iterating through the entire array to find employees with no manager.
2. **orgChartImproved()**: This function uses a more efficient approach by first grouping employees by their managers and then recursively printing the names and titles of nested employees.

**Pros and Cons**

1. **orgChart()**:
	* Pros: Simple, easy to understand, and well-suited for small inputs.
	* Cons: Inefficient for large inputs, as it iterates through the entire array multiple times.
2. **orgChartImproved()**:
	* Pros: More efficient for large inputs, as it uses a tree-like structure to reduce iterations.
	* Cons: Requires more complex data structures and recursive function calls.

**Other considerations**

1. **Memory usage**: `orgChartImproved()` may require more memory to store the managers-employees map, which can impact performance on limited resources.
2. **Cache locality**: The recursive nature of `orgChartImproved()` may lead to poor cache locality, as the same sub-problems are re-computed multiple times.

**Libraries and special features**

There is no explicit library mentioned in the benchmark definition. However, it's worth noting that `orgChartImproved()` uses a simple object map (`managers`) to store employee-manager relationships, which can be seen as a basic implementation of a data structure (e.g., a hash table).

**Special JS features or syntax**

There are no explicit references to special JavaScript features or syntax in the benchmark definition.

**Alternatives**

Other approaches to solving this problem might include:

1. **Using `forEach()` and `map()`**: Instead of recursive functions, one could use `forEach()` and `map()` to iterate through the array and print employee information.
2. **Using a queue-based approach**: Another approach would be to use a queue (e.g., a linked list) to process employees in a level-by-level manner.
3. **Using a graph library**: If the problem were more complex, with multiple layers of nested relationships between employees, using a dedicated graph library could provide a more efficient solution.

These alternatives might offer trade-offs in terms of performance, memory usage, and code complexity compared to the `orgChartImproved()` approach.

Related benchmarks:

Print nested objects by a property (version: 0)

This test different ways of organizing and nesting plain list that has elements nested by certain property

Comparing performance of: orgChart() Test vs orgChartImproved() Test

Created: 5 years ago by: Registered User

Jump to the latest result

orgChart() Test

orgChartImproved() Test

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):