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Math.abs vs >> 0
(version: 0)
Comparing performance of:
Math.abs vs >> 0
Created:
2 years ago
by:
Registered User
Go to the latest result
Tests:
Math.abs
for (let i = 0; i < 100_000; i++) { let a = Math.abs(12345); }
>> 0
for (let i = 0; i < 100_000; i++) { let a = 12345 >> 0; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Math.abs
>> 0
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:132.0) Gecko/20100101 Firefox/132.0
Browser/OS:
Firefox 132 on Linux
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=567481" width="100%" height="500px"></iframe>
Math.abs
10K/s
>> 0
10K/s
View exact numbers
Test name
Executions per second
✓
Math.abs
9,817 Ops/sec
>> 0
9,798 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what is tested, the options compared, pros and cons of those approaches, and other considerations. **Benchmark Overview** The provided JSON represents a JavaScript microbenchmarking test case created on MeasureThat.net. The benchmark compares the performance of two JavaScript operations: `Math.abs` and the bit shift operator (`>> 0`) applied to an integer value (12345). **Options Compared** The benchmark tests two options: 1. **`Math.abs`**: This method calculates the absolute value of a number. 2. **`12345 >> 0`**: This operation performs a bit shift by shifting the binary representation of `12345` to the right by 0 bits, effectively leaving the original value unchanged. **Pros and Cons** * **`Math.abs`**: + Pros: Widely supported across different browsers and platforms. + Cons: May incur additional overhead due to the function call and potential garbage collection. * **`12345 >> 0`**: This is a simple, low-level operation that only relies on bitwise operations. It's likely faster than `Math.abs` but may not be as widely supported. **Other Considerations** The benchmark assumes that the JavaScript engine being tested supports the use of bit shift operators (`>>`) and integer arithmetic. The performance difference between these two options will vary depending on the specific browser or platform, as some engines might optimize one over the other. **Library Used** There is no library explicitly mentioned in this benchmark. However, MeasureThat.net likely uses a built-in JavaScript engine that provides the necessary functionality for running benchmarks. **Special JS Feature/Syntax (None)** There are no special JavaScript features or syntax used in this benchmark. **Alternative Approaches** Other alternatives to compare in microbenchmarking tests might include: * Using `Math.floor` instead of `>> 0` * Employing a loop unrolling strategy for the bit shift operator * Comparing performance with other integer arithmetic operations, such as `12345 + 0` * Including or excluding specific browser-specific optimizations Keep in mind that the choice of alternative approaches will depend on the specific use case and requirements of the benchmark.
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