Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
parseInt vs Number(val.toFixed(0))
(version: 0)
flatMap vs filter map
Comparing performance of:
parseInt vs Number(val.toFixed)
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var arr = []; var i = 0; while (i <= 1E7) arr[i] = i++; console.log(arr);
Tests:
parseInt
arr.map(v => parseInt(v));
Number(val.toFixed)
arr.map(v => Number(v.toFixed(0)));
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
parseInt
Number(val.toFixed)
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 the provided benchmark and explain what's being tested. **Benchmark Overview** The benchmark is comparing two approaches to parse a large array of integers: 1. `parseInt(v)`: using the built-in `parseInt` function to convert each element `v` to an integer. 2. `Number(v.toFixed(0))`: converting each element `v` to a floating-point number by calling the `toFixed` method with a precision of 0. **Library and Purpose** The `flatMap` and `filter` methods are part of the Array prototype in JavaScript, which is not explicitly mentioned in the benchmark definition. However, we can infer that these methods are being used as a way to prepare the array for testing. In this context, `flatMap` and `filter` are likely being used to filter out or transform elements in the array, but their exact purpose is not crucial to understanding the comparison between `parseInt` and `Number`. **Options Compared** The two options being compared are: 1. `parseInt(v)`: a built-in function that converts an integer string to an integer. 2. `Number(v.toFixed(0))`: converting an integer string to a floating-point number with a precision of 0. **Pros and Cons** **`parseInt(v)`** Pros: * Fast execution: `parseInt` is optimized for performance and is usually the fastest way to convert an integer string to an integer. * Simple syntax: The syntax is straightforward and easy to read. Cons: * Limited support: `parseInt` only works with integer strings, and may not work as expected if the input is a floating-point number or a non-numeric value. **`Number(v.toFixed(0))`** Pros: * Flexible: This approach can handle both integer and floating-point numbers. * Generic syntax: The syntax is more generic and can be used for conversions that require rounding to an integer. Cons: * Slower execution: `toFixed` may incur additional overhead compared to `parseInt`. * More complex syntax: The syntax may be less intuitive for developers familiar with `parseInt`. **Other Considerations** When testing performance, it's essential to consider the following factors: * Input size and distribution * Browser or runtime environment * Optimizations enabled (e.g., caching, memoization) * Other system resources consumed (e.g., memory, CPU) **Alternatives** If you wanted to explore alternative approaches, you could consider the following options: 1. `Number(v)`: Without specifying a precision, this approach would convert the input string to a floating-point number without rounding. 2. `Math.round(v) + v.toFixed(0)`: This approach combines rounding with explicit conversion to an integer using `toFixed`. 3. `BigInt(v)`: If available in your target JavaScript environment (e.g., Node.js), you could use `BigInt` to perform high-precision arithmetic. Keep in mind that these alternatives might have different performance characteristics, syntax, or limitations depending on the specific scenario.
Related benchmarks:
javascript array.filter().map() vs array.flatMap()
Array flatMap() vs filter().map()
flatMap() vs filter().map() - arrays
flatMap() vs filter().map() small
comparing flatMap vs filter and map in little arr length
Comments
Confirm delete:
Do you really want to delete benchmark?