Benchmark: 2132111 - MeasureThat.net

Tests:

t12
var customer_no = ""; var chk_no = "1232132132112" + ","; customer_no += chk_no;
t2
var customer_no = ""; var chk_no = "1232132132112" + ","; customer_no.concat(chk_no);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
t12
t2

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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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 on MeasureThat.net.

**Benchmark Definition**

The provided JSON represents a benchmark definition, which is a template for creating and running JavaScript benchmarks. The fields in this JSON are:

* `Name`: A unique identifier for the benchmark (in this case, "2132111").
* `Description`: An optional description of the benchmark (not provided).
* `Script Preparation Code` and `Html Preparation Code`: These fields are empty, indicating that no code is required to prepare the script or HTML before running the benchmark.

**Individual Test Cases**

The test cases are represented as an array of objects, each containing:

* `Benchmark Definition`: A string representing the JavaScript code to be executed. This code defines a variable `customer_no` and concatenates it with another string using either the `+=` operator (test case "t12") or the `concat()` method (test case "t2").

Let's analyze these test cases:

### Test Case 1: `t12`

```javascript
var customer_no = "";
var chk_no      = "1232132132112" + ",";
customer_no += chk_no;
```

* The variable `customer_no` is initialized to an empty string.
* A new string `chk_no` is created by concatenating the string "1232132132112" with a comma (`","`). This is done using the `+=` operator, which appends the new string to the existing value of `customer_no`.
* The resulting concatenated string is assigned back to `customer_no`.

### Test Case 2: `t2`

```javascript
var customer_no = "";
var chk_no      = "1232132132112" + ",";
customer_no.concat(chk_no);
```

* This test case is identical to the previous one, but instead of using the `+=` operator, it uses the `concat()` method to concatenate the strings.

**Comparison of Approaches**

Both approaches (using `+=` and `concat()`) achieve the same result: concatenating two strings. However, there are some differences:

* **Performance**: In modern JavaScript engines, the difference between these two approaches is usually negligible. Both `+=` and `concat()` create a new string object and then assign it to the original variable. This can lead to increased memory allocation and garbage collection overhead.
* **Code Readability**: Using `+=` can make the code more concise and readable, especially in simple cases like this one. On the other hand, using `concat()` explicitly shows the intent of concatenating two strings, which can improve code maintainability.

**Library: None**

There are no libraries used in these test cases. The JavaScript code is straightforward and doesn't rely on any external libraries or frameworks.

**Special JS Feature/Syntax: None**

There are no special JavaScript features or syntax used in these test cases. They only demonstrate basic string concatenation using the `+=` operator and `concat()` method.

**Other Alternatives**

If you want to measure the performance of other string concatenation methods, such as:

* Using template literals (e.g., `${customer_no} ${chk_no}`)
* Using a loop to concatenate strings (e.g., `for (i = 0; i < chk_no.length; i++) { customer_no += chk_no[i]; }`)
* Using a library like Lodash's `repeat()` function

You can create new test cases and benchmark them on MeasureThat.net.

Related benchmarks:

2132111 (version: 0)

Comparing performance of: t12 vs t2

Created: 4 years ago by: Guest

Jump to the latest result

t12

t2

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):