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String() vs .toString() vs plus empty string
(version: 0)
Comparing performance of:
String() vs .toString() vs plus empty string
Created:
2 years ago
by:
Guest
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Tests:
String()
let num = 500; let nums = []; for(let i = 0; i < 100; ++i) { nums.push(String(num)); }
.toString()
let num = 500; let nums = []; for(let i = 0; i < 100; ++i) { nums.push(num.toString()); }
plus empty string
let num = 500; let nums = []; for(let i = 0; i < 100; ++i) { nums.push(num + ''); }
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Suite status:
<idle, ready to run>
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Test case name
Result
String()
.toString()
plus empty string
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**What is being tested?** MeasureThat.net is testing the performance of three different ways to convert a number to a string in JavaScript: using the `String()` function, calling the `toString()` method on the number itself (`num.toString()`), and concatenating an empty string (`+ ''`). **Options compared** The three options are being compared in terms of their execution time. The benchmark is measuring how many executions per second each option can handle. **Pros and Cons of each approach:** 1. **String() function**: This method creates a new string object using the `String()` function, which involves creating an intermediate object before converting it to a string. * Pros: Can be useful when you need to perform additional operations on the resulting string (e.g., formatting). * Cons: Creates an intermediate object, which can increase memory usage and potentially slow down performance. 2. **toString() method**: This method calls the `toString()` method directly on the number itself, which is a built-in method that converts numbers to strings. * Pros: Fast and efficient, as it avoids creating an intermediate object. * Cons: May not work correctly with non-numeric values (e.g., NaN). 3. **Concatenating an empty string (`+ ''`)**: This method uses the `+` operator to concatenate an empty string with the number, effectively converting the number to a string. * Pros: Simple and easy to understand, but may be slower than other methods due to the overhead of concatenation. * Cons: May not work correctly with non-numeric values (e.g., NaN). **Library usage** None of the provided benchmark cases uses any external libraries. **Special JavaScript features or syntax** The benchmark cases use a simple `for` loop and array push method (`nums.push(...)`) to test each option. No special JavaScript features or syntax are used. **Other alternatives** There may be other ways to convert numbers to strings in JavaScript, such as using template literals (e.g., `num.toString()` with template literals) or the `Number.prototype.toString()` method. However, these alternatives are not being tested in this benchmark. In general, when converting numbers to strings, it's essential to consider performance and potential edge cases (e.g., non-numeric values). The choice of method ultimately depends on the specific requirements and constraints of your application.
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