Benchmark: if-else vs object 2

Script Preparation code:

class Host {
    A = 1;
    B = 2;
    C = 3;
}

var host = new Host();

var x = Math.floor(Math.random() * 3);

function testObject(h, p) {
    const obj = {
        [h.A]: 1,
        [h.B]: 2,
        [h.C]: 3,
    }

    return obj[p];
}


function testIfElse(h, p) {
    var v = 0;
    if (p === h.B) {
        v = 1;
    } else if (p === h.C) {
        v = 2;
    } else {
        v = 0;
    }
    return v;
}

Tests:

object
testObject(host, x);
if-else
testIfElse(host, x);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object
if-else

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.

I'll break down the provided benchmark and its options, pros, cons, and other considerations.

**Benchmark Overview**

The `if-else vs object 2` benchmark compares the performance of two approaches:

1. **Object-based approach**: The `testObject` function accesses an object using bracket notation (`obj[h.A]`) based on the value of `h.B`.
2. **If-else approach**: The `testIfElse` function uses a series of if-else statements to determine which branch to execute.

**Library and Special Features**

The benchmark uses the following JavaScript library:

* None, but it utilizes the built-in `Math.random()` function to generate random values.

There are no special JavaScript features or syntax used in this benchmark.

**Benchmark Preparation Code Analysis**

The script preparation code defines two classes: `Host` with properties `A`, `B`, and `C`, and an instance of this class, `host`. The script also generates a random value `x` between 0 and 2. Two functions are defined:

* `testObject`: Takes the `host` object and the random value `x` as arguments. It returns the value associated with `h.B` in the object.
* `testIfElse`: Takes the same arguments as `testObject`. It uses if-else statements to determine which branch to execute based on the value of `p`.

**Options Compared**

The two options being compared are:

1. **Object-based approach**: The `testObject` function accesses the object using bracket notation (`obj[h.A]`) based on the value of `h.B`.
2. **If-else approach**: The `testIfElse` function uses a series of if-else statements to determine which branch to execute.

**Pros and Cons**

* **Object-based approach**:
	+ Pros: Fast access to object properties using bracket notation.
	+ Cons: May be slower due to the overhead of string manipulation (e.g., creating a string representation of `h.B`).
* **If-else approach**:
	+ Pros: Can be faster for small values of `p` since it avoids the overhead of string manipulation.
	+ Cons: Slower for larger values of `p` due to the number of if-else statements and potential branching.

**Other Considerations**

* The benchmark uses a relatively simple object with only three properties, which may affect the performance results. Adding more properties or using a more complex object could alter the outcome.
* The use of `Math.random()` generates random values, which might not be representative of typical usage patterns.
* The benchmark is run on multiple executions per second, which amplifies any differences in performance between the two approaches.

**Alternatives**

Other alternatives for measuring JavaScript performance include:

1. **Benchmarking libraries**: Such as Benchmark.js or micro-benchmark, which provide more features and flexibility than MeasureThat.net.
2. **WebAssembly-based benchmarks**: Which can be used to measure performance on a wide range of devices, including mobile and embedded systems.
3. **JavaScript engines' built-in benchmarking tools**: Some JavaScript engines, like V8 (used by Chrome), have built-in benchmarking tools that can provide more detailed results.

Please note that the choice of benchmarking tool or approach depends on specific use cases and requirements.

Related benchmarks:

if-else vs object 2 (version: 0)

Comparing performance of: object vs if-else

Created: 3 years ago by: Guest

Jump to the latest result

object

if-else

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):