Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
js string to number
(version: 0)
Comparing performance of:
parseInt vs Number
Created:
5 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var x = "125";
Tests:
parseInt
parseInt(x);
Number
Number(x)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
parseInt
Number
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 benchmark and explain what's being tested. **Benchmark Overview** The benchmark is testing two different ways to convert a string representation of a number to an actual number in JavaScript: using the `parseInt()` function and using the `Number()` function. **Options Compared** * `parseInt()`: converts a string to an integer, but returns NaN (Not a Number) if the conversion fails. * `Number()`: attempts to convert a string to a number, returning NaN if the conversion fails. **Pros and Cons of Each Approach** * `parseInt()`: + Pros: faster execution time, as it only needs to parse the first few characters of the string. + Cons: returns NaN if the conversion fails, which can lead to unexpected behavior in some cases. * `Number()`: + Pros: more robust and safe, as it attempts to convert the entire string to a number, not just the first few characters. It also returns 0 if the conversion fails, instead of NaN. + Cons: potentially slower execution time due to the full conversion. **Library and Special JS Feature** There is no library used in this benchmark. However, the `Number()` function uses a special JavaScript feature called "numeric coercion" or " implicit type conversion", which attempts to convert a string to a number by iterating through each character and looking for digits. **Other Considerations** * The benchmark only tests these two specific approaches, but other methods exist, such as using regular expressions or the `parseFloat()` function. * The use of `parseInt()` with radix 10 is common in JavaScript, as it allows for more control over the conversion process. **Benchmark Preparation Code** The preparation code creates a string variable `x` containing the value "125", which will be used for testing. **Individual Test Cases** Each test case consists of a single line of JavaScript code: either `parseInt(x);` or `Number(x);`. The benchmark runs these two lines multiple times to measure their performance. **Latest Benchmark Result** The result shows that, on the specified device and browser configuration (Chrome 108, Windows), `Number()` outperformed `parseInt()`, with approximately 10% more executions per second.
Related benchmarks:
Parse string to number
Number vs + vs parseFloat 23
Convert String to Number parseInt vs +
string to number convert
Comments
Confirm delete:
Do you really want to delete benchmark?