Benchmark: IPv4_Regex_VS_Example_VPC_Flow_log

Script Preparation code:

var event = "2 123456789010 eni-1235b8ca123456789 172.31.16.139 172.31.16.21 20641 22 6 20 4249 1418530010 1418530070 ACCEPT OK";

Tests:

(regex).test(event)
/(?<!\d)(?:(?:[01]?\d\d?|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d\d?|2[0-4]\d|25[0-5])(?!\d)/.test(event)
(event).match(regex)
!!event.match(/(?<!\d)(?:(?:[01]?\d\d?|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d\d?|2[0-4]\d|25[0-5])(?!\d)/)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
(regex).test(event)
(event).match(regex)

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36

Browser/OS: Chrome 97 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
(regex).test(event)	3907207.0 Ops/sec
(event).match(regex)	3601769.8 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

The provided JSON represents a benchmark for testing the performance of regular expression matching in JavaScript. The test is designed to compare two approaches: using the `test()` method and using the `match()` method with the `/regex/` syntax.

**What is being tested?**

In this benchmark, we have three main things being compared:

1. **Regular expression execution**: We're testing how quickly a regular expression pattern can be executed on a given string (`event`).
2. **`test()` method**: We're checking how fast the `test()` method can be used to execute a regular expression pattern.
3. **`match()` method with `/regex/` syntax**: We're comparing the speed of using the `match()` method with a specific regular expression pattern.

**Options compared:**

The two main options being compared are:

1. **Using the `test()` method**: This involves calling the `test()` method on a string with a regular expression pattern, which returns `true` if the string matches the pattern and `false` otherwise.
2. **Using the `match()` method with `/regex/` syntax**: This involves calling the `match()` method on a string with a regular expression pattern enclosed in forward slashes (`/regex/`) and the `g` flag (which is omitted in this benchmark).

**Pros and Cons:**

* **`test()` method**:
	+ Pros: Generally faster for simple, single-pass tests.
	+ Cons: Returns only the result of the first match or `false` if no match is found. Requires multiple iterations to check if a string matches the pattern.
* **`match()` method with `/regex/` syntax**:
	+ Pros: Allows for more flexibility and easier maintenance by using a standard, language-agnostic way of defining regular expressions.
	+ Cons: Can be slower due to the overhead of compiling the regex pattern and executing it.

In this benchmark, both approaches are tested, but the `test()` method appears to be slightly faster. However, if you need more control over the regex pattern or want to use a more language-agnostic syntax, using the `match()` method with `/regex/` might be a better choice.

**Library/Language features:**

* No external libraries are used in this benchmark.
* The provided JavaScript code uses the standard ECMAScript 2022 syntax and does not include any special JavaScript features or syntax beyond regular expressions.

**Other alternatives:**

If you're interested in exploring alternative approaches to regular expression matching, you might consider:

1. **Using a regex engine**: Some libraries like `regex` (Node.js) or `regex-x` (JavaScript) provide optimized regex engines that can improve performance.
2. **Using a different string matching algorithm**: Algorithms like Boyer-Moore or Knuth-Morris-Pratt could be used for faster matching, but might require more implementation effort.

Keep in mind that the choice of approach depends on your specific use case and requirements. The MeasureThat.net benchmark provides a good starting point to compare performance characteristics of different approaches, but you may need to experiment further to determine the best solution for your specific needs.

Related benchmarks:

IPv4_Regex_VS_Example_VPC_Flow_log (version: 0)

Comparing performance of: (regex).test(event) vs (event).match(regex)

Created: 2 years ago by: Guest

Jump to the latest result

(regex).test(event)

(event).match(regex)

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):