Benchmark: replaceAll native vs regex replace

Tests:

replace regex
"this is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is it".replace(/ /g, "+");
replace All
"this is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is itthis is it".replaceAll(" ", "+");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replace regex
replace All

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the world of MeasureThat.net and explore what's being tested in this benchmark.

**Benchmark Definition**
The benchmark is defined by two test cases, each with a unique approach to replace whitespace characters (`\s`) with double quotes (`"+"`). The two approaches are:

1. **Regex Replace**: This approach uses a regular expression to replace whitespace characters. The `replace()` method takes two arguments: the string to search for (in this case, `\s`), and the replacement string (`"+"`).
2. **ReplaceAll**: This approach uses the built-in `replaceAll()` method of JavaScript strings, which replaces all occurrences of a substring with another string.

**Options Compared**
The benchmark is comparing the performance of these two approaches:

* Regex Replace: Uses regular expressions to replace whitespace characters.
* ReplaceAll: Uses the built-in `replaceAll()` method of JavaScript strings.

**Pros and Cons**

* **Regex Replace**:
	+ Pros: Highly flexible and powerful, allows for complex pattern matching and character classes.
	+ Cons: Can be slower due to the overhead of compiling regular expressions.
* **ReplaceAll**:
	+ Pros: Faster and more lightweight than Regex Replace.
	+ Cons: Less flexible and limited to simple string replacements.

**Library Usage**
Neither test case uses any external libraries. The `replace()` method is a built-in JavaScript method, and `replaceAll()` is also a native JavaScript method.

**Special JS Feature or Syntax**
There are no special JavaScript features or syntax used in this benchmark.

**Other Alternatives**
If you were to use different approaches for replacing whitespace characters, you might consider:

* Using an escape sequence (`\u0022`) instead of double quotes, which can be faster but less readable.
* Using a template string replacement approach (e.g., `String.replace()`), which can be more efficient than `replace()` or `replaceAll()`.
* Using a third-party library like RegEx.js or regex-tester, which can provide additional features and optimizations.

Keep in mind that these alternatives would likely change the performance characteristics of the benchmark, so it's essential to consider your specific use case and requirements.

Related benchmarks:

replaceAll native vs regex replace (version: 0)

Comparing performance of: replace regex vs replace All

Created: 5 years ago by: Guest

Jump to the latest result

replace regex

replace All

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):