Benchmark: Compare string place methods 2

Script Preparation code:

var str = 'sdfsdfsfmsdmfsmfsdfmsmfsdfdsfmsdfmdsfsfsdmfsdfsm fs  msdm sd fsd msd msfdf fsmdff smd\u0012sajsha dkdjsa';

Tests:

Str replace while
while (str.includes("m")) { str = str.replace('m', 'N'); } console.log("while", str);
Split and Join
str = str.split('m').join('N'); console.log("splitNjoin", str);
replace first only
str = str.replace('m', 'N'); console.log("replace 1st", str);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Str replace while
Split and Join
replace first only

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is tested on MeasureThat.net.

**Benchmark Definition**

The benchmark definition represents the test case itself. In this case, we have three test cases:

1. "Str replace while": This test case uses a `while` loop to repeatedly replace all occurrences of the character 'm' with 'N' in the string `str`.
2. "Split and Join": This test case splits the string `str` into an array using the `split()` method, replaces all occurrences of the character 'm' with 'N', and then joins the array back together using the `join()` method.
3. "replace first only": This test case uses the `replace()` method to replace only the first occurrence of the character 'm' with 'N' in the string `str`.

**Options being compared**

The three test cases are comparing different approaches for replacing all occurrences of a character in a string:

* The "Str replace while" test case uses a `while` loop, which can be slower than other methods because it involves repeated iterations.
* The "Split and Join" test case uses the `split()` and `join()` methods, which involve creating an intermediate array. This method may be slower due to the overhead of creating an array.
* The "replace first only" test case uses a single call to the `replace()` method, which is likely to be the fastest option because it involves a simple replacement operation.

**Pros and cons**

Here are some pros and cons for each approach:

* "Str replace while":
	+ Pros: can be used with any string, doesn't require creating an intermediate array.
	+ Cons: may be slower due to repeated iterations.
* "Split and Join":
	+ Pros: creates a clean and modular code structure, but may be slower due to the overhead of creating an array.
	+ Cons: requires creating an intermediate array, which can be slower.
* "replace first only":
	+ Pros: likely to be the fastest option due to its simplicity.
	+ Cons: limited to replacing only the first occurrence of the character.

**Library and syntax**

There are no libraries or special JavaScript features mentioned in the benchmark definition. The tests only use built-in JavaScript methods like `includes()`, `replace()`, `split()`, and `join()`.

However, it's worth noting that the use of `\u0012` in the original benchmark script is a Unicode escape sequence, which may be specific to certain environments or browsers. MeasureThat.net has likely handled this for you, so you don't need to worry about it.

**Alternatives**

If you're looking for alternative approaches to replacing all occurrences of a character in a string, here are some options:

* Using `String.prototype.replaceAll()`: This method is supported by modern browsers and can be faster than the `replace()` method.
* Using a regular expression: You can use a regular expression with the `g` flag to replace all occurrences of a pattern in a string. For example: `str = str.replace(/m/g, 'N');`
* Using a library like Lodash: If you're working with large datasets or need more advanced string manipulation capabilities, you may want to consider using a library like Lodash.

In general, the choice of approach will depend on your specific use case and performance requirements.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Browser/OS: Chrome 71 on Mac OS X 10.14.1

View result in a separate tab

Test name	Executions per second
Str replace while	96658.4 Ops/sec
Split and Join	87833.1 Ops/sec
replace first only	83535.8 Ops/sec

Related benchmarks:

Compare string place methods 2 (version: 0)

Comparing performance of: Str replace while vs Split and Join vs replace first only

Created: 5 years ago by: Guest

Jump to the latest result

Str replace while

Split and Join

replace first only

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):