Benchmark: Split vs Regex tes cstom

Script Preparation code:

var testString = "testing,Newlines,Bleh"

Tests:

Splitting29964
var values = testString.split(","); var value1 = values[0]; var value2 = values[1]; var value3 = values[2];
Regex99
var regex = /.+((?=,)|$)/g var value1 = regex[0]; var value2 = regex[1]; var value3 = regex[2];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Splitting29964
Regex99

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser/OS: Chrome 126 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Splitting29964	16885598.0 Ops/sec
Regex99	52343048.0 Ops/sec

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.

**What is tested?**

The provided JSON represents two individual test cases, each designed to measure the performance of different approaches for extracting values from a string.

**Options compared:**

There are two options being compared:

1. **String Split**: This approach uses the `split()` method with a comma (`,`) as the separator to split the input string into an array of values.
2. **Regular Expressions (Regex)**: This approach uses a regular expression (`/.+((?=,)|$)/g`) to extract values from the input string.

**Pros and Cons:**

1. **String Split**:
	* Pros:
		+ Easy to understand and implement.
		+ Fast for simple use cases with well-defined separators.
	* Cons:
		+ Can be slow if the separator is not found, or if the input string contains many separators.
		+ May not work correctly for edge cases (e.g., null or undefined values).
2. **Regular Expressions (Regex)**:
	* Pros:
		+ Highly flexible and powerful for complex pattern matching.
		+ Can handle edge cases more effectively than string split.
	* Cons:
		+ Steeper learning curve due to the complexity of regular expressions.
		+ Performance may be slower compared to string split, especially for simple use cases.

**Library usage:**

In the provided benchmark code, no libraries are explicitly mentioned. However, it's worth noting that some JavaScript engines (e.g., V8) have built-in support for regular expression optimizations, which might affect performance.

**Special JS feature or syntax:**

There are a few notable features and syntax elements used in this benchmark:

1. **Template literals (`\`)**: Used to create string literals with embedded expressions.
2. **Arrow functions (`=>`)**: Used as shorthand for function declarations (not explicitly shown, but implied by the `Benchmark Definition`).

**Other alternatives:**

Alternative approaches to extracting values from a string could include:

1. **Array methods (e.g., `map()`, `filter()`)**
2. **String manipulation functions (e.g., `indexOf()`, `substr()`)**
3. **Regular expression alternatives (e.g., `.match()` instead of `.exec()`)**

Keep in mind that each approach has its trade-offs, and the choice ultimately depends on the specific requirements and constraints of the project.

I hope this explanation helps! Let me know if you have any further questions or need clarification on any of these points.

Related benchmarks:

Split vs Regex tes cstom (version: 0)

Comparing performance of: Splitting29964 vs Regex99

Created: one year ago by: Guest

Jump to the latest result

Splitting29964

Regex99

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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