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Math.floor Vs parseInt
(version: 0)
Benchmark.js
Comparing performance of:
parseInt vs Math.floor
Created:
4 years ago
by:
Guest
Go to the latest result
Tests:
parseInt
console.log('myclientid_' + parseInt('' + Math.random() * 100, 10))
Math.floor
console.log('myclientid_' + Math.floor(Math.random() * 100))
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
parseInt
Math.floor
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36
Browser/OS:
Chrome 139 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=615664" width="100%" height="500px"></iframe>
Math.floor
344K/s
parseInt
221K/s
View exact numbers
Test name
Executions per second
✓
Math.floor
343,702 Ops/sec
parseInt
221,412 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmarking setup and explain what's being tested. **What is being tested?** The benchmark measures the performance difference between `Math.floor` and `parseInt` in JavaScript, specifically when used with a random integer value. **Options compared:** There are two options being compared: 1. `Math.floor`: This function returns the largest integer less than or equal to a given number. 2. `parseInt`: This function converts a string representation of an integer to its corresponding integer value. **Pros and Cons:** **`Math.floor`:** Pros: * Simple and straightforward implementation * Fast and efficient, as it only requires a single arithmetic operation Cons: * May not work correctly with negative numbers or non-integer values * Can be slower than `parseInt` for certain inputs due to the overhead of rounding down to the nearest integer **`parseInt`:** Pros: * More versatile, as it can handle strings with leading zeros and non-integer values * Faster than `Math.floor` for certain inputs, such as large integers or strings with multiple decimal places Cons: * More complex implementation due to the need to parse the string representation of an integer * May introduce additional overhead or errors if not used correctly **Library usage:** There is no explicit library mentioned in the provided code. However, `parseInt` relies on the host environment's number parsing functionality, which may use libraries like ICU (International Components for Unicode) under the hood. **Special JavaScript features:** The benchmark doesn't explicitly use any special JavaScript features or syntax beyond standard ES6+ syntax. If you're interested in exploring more advanced features, you could consider adding options that utilize modern language constructs like async/await, Promises, or Web Workers. **Other alternatives:** If you'd like to explore alternative approaches or modifications to this benchmark, here are a few suggestions: * Compare the performance of `Math.floor` and `parseInt` with different radix values (e.g., base 16 or base 36). * Test the performance of `Math.floor` versus `parseFloat` for floating-point arithmetic. * Explore the impact of using a different data type (e.g., BigInt) on the performance of these functions. To modify the benchmark, you would need to update the `Benchmark Definition` JSON and adjust the test cases accordingly. The updated code would look something like this: ```json "[ { "Benchmark Definition": "console.log('myclientid_' + Math.floor(Math.random() * 100, 16))", "Test Name": "Math.floor radix 16" }, // ... ] ``` Keep in mind that you'll need to update the test cases and benchmark preparation code to accommodate any changes you make to the benchmark.
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