Benchmark: assignment - MeasureThat.net

Tests:

smart
var x; for(i=0; i<10000; i++){ (x < 0) || (x = i); }
stupid
var x; for(i=0; i<10000; i++){ if (x > -1) { x = i; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
smart
stupid

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser/OS: Firefox 138 on Windows

View result in a separate tab

Test name	Executions per second
smart	14589.8 Ops/sec
stupid	73665.5 Ops/sec

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 explain what's being tested, compared, and the pros and cons of different approaches.

**Benchmark Definition**

The benchmark definition is empty, which means that the script preparation code and HTML preparation code are not required for this specific benchmark. The script only contains a simple loop with conditional statements.

**Individual Test Cases**

There are two test cases:

1. **"smart"`**: This test case has a single line of code inside the loop: `(x < 0) || (x = i);`. This is an assignment expression, also known as a short-circuit assignment. It's equivalent to `if (x < 0) { x = i; } else { x = -1; }`, but it's more concise and potentially faster because it avoids the overhead of a separate if-else statement.

2. **"stupid"`**: This test case has an if-else statement inside the loop: `if (x > -1) { x = i; }`. This is a more traditional approach to assigning a value to `x` based on some condition.

**Comparison of Options**

In both test cases, we have two approaches:

* **Assignment Expression (Smart)**: `(x < 0) || (x = i);`
* **If-Else Statement (Stupid)**: `if (x > -1) { x = i; }`

The pros and cons of these options are:

**Assignment Expression (Smart)**

Pros:

* More concise code, which can lead to better performance due to fewer operations.
* Can be more readable, especially for simple cases like this one.

Cons:

* May not work as expected in certain situations, such as when `x` is `-1` and the condition is false. In this case, `x` will remain `-1`.
* Not all JavaScript engines support short-circuit assignment expressions (yet!).

**If-Else Statement (Stupid)**

Pros:

* Guaranteed to work in all cases, even when `x` is `-1`.
* More readable for some people, as it explicitly states the condition and action.

Cons:

* Less concise code, which can lead to slower performance due to more operations.
* May be less readable for some developers who are used to shorter code.

**Library Usage**

There is no library mentioned in the provided benchmark definition or test cases. However, if you were to add a library, some options might include:

* `mathjs`: A JavaScript library for mathematical operations. If this was used in the benchmark, it could impact performance and readability.
* `lodash`: A popular JavaScript utility library that provides various functions, including those related to conditional statements.

**Special JS Features/Syntax**

There are no special JS features or syntax mentioned in the provided benchmark definition or test cases. However, if you were to add them, some examples might include:

* **Arrow Functions**: Used for concise code, but may not be supported by older JavaScript engines.
* **Async/Await**: Used for asynchronous code, which can impact performance and readability.

**Alternatives**

If you're looking for alternatives to MeasureThat.net, consider the following options:

1. **Benchmark.js**: A popular benchmarking library for Node.js.
2. **Benchmark-HighPerformance**: A high-performance benchmarking library for JavaScript.
3. **JSPerf**: A simple benchmarking tool specifically designed for JavaScript.

Keep in mind that these alternatives might have different features, ease of use, and performance characteristics compared to MeasureThat.net.

Related benchmarks:

assignment (version: 0)

ba

Comparing performance of: smart vs stupid

Created: 7 years ago by: Guest

Jump to the latest result

smart

stupid

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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