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parseInt vs Number vs Plus addition
(version: 0)
Comparing performance of:
No conversion vs parseInt vs Number vs Plus
Created:
3 years ago
by:
Guest
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Script Preparation code:
var intA = 42.034; var strB = "42.034";
Tests:
No conversion
var res = intA + strB;
parseInt
var res = parseInt(intA) + parseInt(strB);
Number
var res = Number(intA) + Number(strB);
Plus
var res = +intA + +strB;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
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Test case name
Result
No conversion
parseInt
Number
Plus
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
9 months ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36
Browser/OS:
Chrome 138 on Mac OS X 10.15.7
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Embed Benchmark Result
Test name
Executions per second
No conversion
120219440.0 Ops/sec
parseInt
125410440.0 Ops/sec
Number
148070704.0 Ops/sec
Plus
159569168.0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark definition and test cases. **What is tested?** The benchmark measures the performance of different approaches to perform addition on two variables: 1. `intA` - an integer value 2. `strB` - a string value containing a decimal number The tests compare the performance of three methods: a. **No conversion**: directly adding `intA` and `strB` b. **parseInt**: converting both values to integers using `parseInt()` function c. **Number**: converting both values to numbers using the `Number()` function d. **Plus**: using the unary plus operator (`+`) to convert both values to numbers **Options compared:** The benchmark compares the performance of these four methods: 1. Direct addition without conversion (`No conversion`) 2. Using `parseInt()` for both conversions (`parseInt`) 3. Using `Number()` for both conversions (`Number`) 4. Using the unary plus operator for both conversions (`Plus`) **Pros and Cons:** Here's a brief overview of each method's pros and cons: a. **No conversion**: This approach is simple and straightforward, but it may lead to unexpected results if the string value is not a valid decimal number. * Pros: Simple, fast execution * Cons: Potential for errors due to invalid input b. **parseInt**: Converts both values to integers using `parseInt()`. This method is more predictable than direct addition, but it may have performance implications due to function calls. * Pros: Predictable results, easier to maintain * Cons: May incur performance overhead due to function calls c. **Number**: Similar to `parseInt`, converts both values to numbers using the `Number()` function. * Pros: More flexible than `parseInt` and allows for decimal numbers * Cons: Still may incur performance overhead due to function calls d. **Plus**: Uses the unary plus operator (`+`) to convert both values to numbers. * Pros: Fast execution, minimal function call overhead * Cons: May be less readable or maintainable than other approaches **Library/Function explanations:** The benchmark uses two built-in JavaScript functions: 1. `parseInt()`: Converts a string to an integer value, ignoring the decimal part if present. 2. `Number()`: Converts a string to a number value. These functions are widely supported and used in various contexts. **Special JS feature/syntax:** There is no special JavaScript feature or syntax mentioned in this benchmark. The tests focus on the performance of different methods for performing arithmetic operations on strings and integers. **Alternatives:** If you're looking for alternative approaches, consider the following: 1. **Using a library like moment.js**: For working with dates and numbers, libraries like moment.js can provide more accurate and efficient results. 2. **Implementing a custom parser**: If you have specific requirements or constraints, implementing a custom parser for parsing decimal numbers from strings could be an alternative. 3. **Using other conversion methods**: Depending on the specific use case, you might consider using other conversion methods like `parseFloat()` (floating-point parsing) or `Big.js` for large number parsing. Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to the original benchmark.
Related benchmarks:
parseInt vs Number addition
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parseInt vs Number addition Fork
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