Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
parseInt vs slice + Number
(version: 0)
Test parseInt vs slice (to remove non-numeric portion) + Number constructor
Comparing performance of:
String.slice + Number constructor vs parseInt
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
str = "1875 Tokens";
Tests:
String.slice + Number constructor
Number(str.slice(0, -7));
parseInt
parseInt(str);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
String.slice + Number constructor
parseInt
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in the provided benchmark. **Overview** The benchmark is comparing two approaches to extract numeric values from a string: 1. Using `String.slice()` with a negative offset to remove non-numeric characters and then converting the resulting string to a number using the `Number` constructor. 2. Using the built-in `parseInt()` function to parse the string directly. **Options Compared** The benchmark is testing two options: * Option A: `String.slice(0, -7)` followed by `Number()`. This approach removes the non-numeric characters from the end of the string and then converts the remaining characters to a number. * Option B: `parseInt(str)`. This approach parses the entire string at once. **Pros and Cons** **Option A (`String.slice(0, -7)` followed by `Number()`):** Pros: * Can be useful when you need to extract numeric values from a string while preserving the original character set. * Allows for more control over the extraction process. Cons: * Requires two steps: slicing and converting to number. * May be slower due to the additional step. **Option B (`parseInt(str)`):** Pros: * Faster, as it only requires one operation. * More concise and readable code. Cons: * May not work correctly if the input string contains non-numeric characters that are not immediately followed by a numeric value. * May throw an error or return `NaN` (Not a Number) if the parsing fails. **Other Considerations** When using `parseInt(str)`, it's essential to consider the second argument, which specifies the radix (base) of the number. If omitted, it defaults to 10 (decimal). For example, `parseInt("0x12a")` would interpret "12a" as a hexadecimal number. **Library and Special JS Features** In this benchmark, no libraries are used, and there are no special JavaScript features being tested. **Alternatives** Other approaches to extract numeric values from a string include: * Using regular expressions (e.g., `RegExp.test(str)`). * Utilizing a library like Moment.js for date parsing. * Implementing a custom solution using a parser or a tokenizer. Keep in mind that the choice of approach depends on the specific requirements and constraints of your project.
Related benchmarks:
+string vs Number vs parseInt
parseInt vs Number parsing
Number vs Number.parseInt vs parseInt
Implicit vs parseInt vs Number string to num
Comments
Confirm delete:
Do you really want to delete benchmark?