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RegEx.test vs. Equals
(version: 0)
Benchmark.js
Comparing performance of:
RegEx.test vs Equals
Created:
2 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var string = "Cat"; var regex = /Cat|Lion|Tiger/;
Tests:
RegEx.test
regex.test(string);
Equals
string === ("Cat" || "Lion" || "Tiger")
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
RegEx.test
Equals
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/139.0.0.0 Safari/537.36 Edg/139.0.0.0
Browser/OS:
Chrome 139 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=615367" width="100%" height="500px"></iframe>
Equals
183.9M/s
RegEx.test
55.1M/s
View exact numbers
Test name
Executions per second
✓
Equals
183,926,576 Ops/sec
RegEx.test
55,112,440 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided benchmark definition and test cases to explain what's being tested, the compared options, their pros and cons, and other considerations. **Benchmark Definition Overview** The benchmark is comparing two approaches for testing if a string matches a certain pattern: 1. `regex.test(string)`: This approach uses the built-in `test()` method of JavaScript regular expressions. 2. `(string === (\"Cat\" || \"Lion\" || \"Tiger\"))`: This approach uses a simple equality check with a tuple of strings. **Comparison Overview** The benchmark is comparing these two approaches to measure which one performs better in terms of execution speed. **Options Compared:** 1. **Regex.test()**: This method tests if the entire string matches the regular expression. 2. **Simple Equality Check**: This approach checks if the input string is equal to any of the strings in the tuple (`"Cat"`, `"Lion"`, or `"Tiger"`). **Pros and Cons:** 1. **Regex.test()**: * Pros: + More flexible for complex patterns. + Allows for more precise matching (e.g., exact matches, partial matches). * Cons: + May be slower due to the complexity of the regex engine. 2. **Simple Equality Check**: * Pros: + Faster execution time since it only compares strings using equality operators (`===`). * Cons: + Less flexible and less precise than `regex.test()`. **Library Used:** None explicitly mentioned, but JavaScript's built-in regular expression engine is used for the `regex.test()` method. **Special JS Feature/Syntax:** The benchmark does not use any special JavaScript features or syntax beyond standard language constructs. However, it's worth noting that modern browsers may optimize certain operations under the hood, which might affect the results. **Other Considerations:** * The benchmark only tests a single string (`"Cat"`), so the results might not generalize to other strings. * The test case uses a tuple with three elements, but this is just for simplicity. In a real-world scenario, you would likely want to compare against multiple values or use a more robust matching mechanism. **Alternatives:** If you need to perform similar benchmarks in the future, consider these alternatives: 1. Use `String.prototype.includes()` instead of `regex.test()`, which might be faster and still provides some flexibility. 2. Compare against an array of strings using `Array.prototype.some()` or `Array.prototype.every()` methods. 3. Consider using a library like RegExBenchmark to create more complex benchmarks with various regex patterns. Keep in mind that the specific results may vary depending on the JavaScript engine, browser, and system configuration being used.
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