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isInteger vs Regexp
(version: 0)
Benchmark.js
Comparing performance of:
Regexp vs isInteger
Created:
7 years ago
by:
Guest
Go to the latest result
Script Preparation code:
let arr = []; const fin = Number((Math.random() * 10).toFixed()) for (let i = 0; i <= fin; i++) { arr.push(i); }
Tests:
Regexp
for (let i = 0; i <= 10; i++) { /^(?:[-+]?(?:0|[1-9]\d*))$/.test(i); }
isInteger
for (let i = 0; i <= 10; i++) { Number.isInteger(i); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Regexp
isInteger
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=615336" width="100%" height="500px"></iframe>
isInteger
64.1M/s
Regexp
5.4M/s
View exact numbers
Test name
Executions per second
✓
isInteger
64,111,576 Ops/sec
Regexp
5,368,334 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and its results. **Benchmark Description** The benchmark compares two approaches to test whether a number is an integer: using a regular expression (`Regexp`) versus using the `Number.isInteger()` function in JavaScript. **Options Compared** 1. **Regular Expression (Regexp)**: * Pros: + Can be used for more complex type checking. + Often used for parsing and validation tasks. * Cons: + Can be slower due to the overhead of regular expression compilation and execution. + May have performance issues if not properly optimized. 2. **Number.isInteger()**: * Pros: + Faster, as it's a built-in function specifically designed for this purpose. + Often used in conjunction with other methods, making it a common choice. * Cons: + Only works on numbers, not strings or other types. **Other Considerations** When choosing between these two approaches, consider the specific requirements of your use case: * If you need to check if a value is an integer for parsing or validation purposes, `Regexp` might be a better choice. * If you're working with numbers and performance is critical, `Number.isInteger()` is likely a better option. **Library Used** Neither of the two options relies on any external libraries. However, it's worth noting that modern JavaScript engines have built-in support for regular expressions, which can affect performance. **Special JS Features or Syntax** There are no special features or syntax used in these benchmark cases. The code is written in plain JavaScript. **Alternative Approaches** If you're looking for alternative approaches to test if a number is an integer, consider: 1. **ToNumber() and isNaN()**: `isNaN(Number(x))` can be used as an alternative to checking with `isInteger()` or Regexp. 2. **Type Checking**: Using type annotations (e.g., TypeScript) can help catch errors at compile-time rather than runtime. Keep in mind that the performance of these alternatives might vary depending on your specific use case and JavaScript environment. I hope this explanation helps you understand the benchmark and its results!
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