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Dividing vs unshifting right
(version: 0)
Comparing performance of:
divide vs unshift
Created:
2 years ago
by:
Registered User
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Tests:
divide
console.log(4 / 4)
unshift
console.log(4 >> 2)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
divide
unshift
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0
Browser/OS:
Firefox 125 on Windows
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<iframe src="https://measurethat.net/Embed?id=514249" width="100%" height="500px"></iframe>
Test name
Executions per second
divide
47805.0 Ops/sec
unshift
43397.0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmarking data and explain what's being tested, the options compared, pros and cons of each approach, and other considerations. **Benchmark Definition** The benchmark definition is empty, which means that the test cases will use default values or scripts to perform the operations. The script preparation code and HTML preparation code are also empty, indicating that no specific setup is required for these tests. **Individual Test Cases** There are two test cases: 1. **divide**: This test case performs a simple division operation using `console.log(4 / 4)`. 2. **unshift**: This test case uses the unsigned right shift operator (`>>`) to perform an unshifting operation on a value. **Options Compared** The options compared are: * Division (using `/`) * Unshifting right (using `>>`) **Pros and Cons of Each Approach** * **Division (using `/`):** + Pros: - Widely supported by most browsers - Easy to understand and implement + Cons: - May be slower due to division operation - May require more CPU cycles for large values * **Unshifting right (using `>>`):** + Pros: - Can be faster than division for small integer values - Does not require decimal precision + Cons: - Not widely supported by older browsers or non-x64 architectures - May cause issues with negative numbers **Other Considerations** * The `>>` operator performs an unshifting right, which is equivalent to multiplying the value by 2 and then performing a binary right shift. This can be faster than division for small integer values. * The choice between division and unshifting right ultimately depends on the specific use case and target browser support. **Library Usage** There is no explicit library usage in these test cases, but some browsers may use their own optimizations or implementations of the division or unshifting right operations. **Special JS Features/Syntax** There are no special JavaScript features or syntax used in these test cases. They rely on standard JavaScript operators and functions. **Other Alternatives** Alternative approaches could include: * Using a library like [Benchmark.js](https://benchmarkjs.com/) or [V8 Benchmarking Tool](https://v8.dev/tools/benchmarking) to measure performance. * Implementing a custom benchmarking framework using Web Workers or other concurrency mechanisms. * Using a different benchmarking algorithm, such as the [Floyd's Cycle Sort Algorithm](https://en.wikipedia.org/wiki/Floyd%27s_cycle_sort), for comparison. In summary, the provided benchmark tests the performance difference between division and unshifting right operations in JavaScript. The choice of operation depends on the specific use case and target browser support.
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