Benchmark: xxxgfsdgsdgf - MeasureThat.net

Script Preparation code:

var str = "";
var i;
var sArr = [];
var repStr = [].fill("String concatenation %", 1000).join(" ");
var repData = [].fill(1000, 0);

Tests:

String concatentation
for (i = 1000; i > 0; i--) { str += "String concatenation. "; }
Array join
for (i = 1000; i > 0; i--) { sArr[i] = "String concatenation. "; } str = sArr.join("");
replace
var index = 0; str = repStr.replace(/%/g, function () { return repData[index++]; })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String concatentation
Array join
replace

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) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Windows

View result in a separate tab

Test name	Executions per second
String concatentation	1522.8 Ops/sec
Array join	4210.5 Ops/sec
replace	1481323.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark test cases and explain what's being tested.

**Benchmark Definition JSON**

The provided `Benchmark Definition` JSON contains three test cases:

1. **String concatenation**: This test case measures the performance of adding strings to a variable using the `+=` operator. The script preparation code includes a loop that runs 1000 times, appending `"String concatenation."` to the `str` variable.
2. **Array join**: This test case measures the performance of joining an array of strings into a single string using the `join()` method. The script preparation code creates an array `sArr` with 1000 elements, each containing `"String concatenation."`, and then joins it into a string using `str = sArr.join("");`.
3. **Replace**: This test case measures the performance of replacing a pattern in a string using the `replace()` method. The script preparation code includes a regular expression replacement function that takes the `index` variable as an argument, which increments each time through the loop.

**Options Compared**

The benchmark tests different approaches to perform these operations:

* **String concatenation**: The test measures the performance of adding strings to a variable using the `+=` operator.
* **Array join**: The test measures the performance of joining an array of strings into a single string using the `join()` method.
* **Replace**: The test measures the performance of replacing a pattern in a string using the `replace()` method.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. **String concatenation**:
	* Pros: Simple, easy to understand, and often used in everyday code.
	* Cons: Can lead to performance issues if done excessively, as it creates temporary strings that need to be garbage collected.
2. **Array join**:
	* Pros: More efficient than string concatenation, as it avoids creating temporary strings and uses a single operation to create the final result.
	* Cons: Requires creating an array of strings, which can be memory-intensive for large datasets.
3. **Replace**:
	* Pros: Can be faster than string concatenation or array join for certain use cases, such as when working with regular expressions.
	* Cons: May not be suitable for all use cases, especially those involving multiple replacements or complex patterns.

**Library and Special JS Feature**

The benchmark tests do not rely on any specific libraries or special JavaScript features. The script preparation code uses standard JavaScript syntax and does not include any proprietary or experimental APIs.

**Other Alternatives**

If you're interested in exploring alternative approaches to string concatenation, array join, or regular expression replacement, here are some additional options:

* **Template literals**: A newer feature in JavaScript that allows you to create strings with embedded expressions using backticks (`).
* **String interpolation**: Techniques like using `String.prototype.replace()` or `String.prototype.split()` can provide alternative approaches to string manipulation.
* **Libraries and frameworks**: Depending on your use case, libraries like Lodash or Ramda might offer more efficient or convenient solutions for certain operations.

For this specific benchmark, the results suggest that array join is the most efficient approach among the three tested methods. However, the choice of method ultimately depends on your specific requirements and constraints.

Related benchmarks:

xxxgfsdgsdgf (version: 0)

Comparing performance of: String concatentation vs Array join vs replace

Created: one year ago by: Guest

Jump to the latest result

String concatentation

Array join

replace

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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