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integer division
(version: 0)
Comparing performance of:
division vs minus
Created:
4 years ago
by:
Guest
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Tests:
division
const data = Math.floor(Math.random() * Math.pow(2, 16)) const space = Math.pow(2, 8) const clipped = data % space for (let i = 0; i < 1000; i++) { const remaining = Math.floor(data / space) }
minus
const data = Math.floor(Math.random() * Math.pow(2, 16)) const space = Math.pow(2, 8) const clipped = data % space for (let i = 0; i < 1000; i++) { const remaining = Math.floor((data - clipped) / space) }
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Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
division
minus
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and its test cases. **Benchmark Overview** The benchmark measures JavaScript performance, specifically focusing on integer division operations. The tests are designed to compare two approaches: dividing `data` by `space` directly and subtracting the remainder from `data` before performing the division. **Test Cases** There are two test cases: 1. **"division"`**: This test case performs direct integer division of `data` by `space`. The purpose is to measure how fast JavaScript can perform this operation. 2. **"minus"`**: This test case subtracts the remainder (`clipped`) from `data` before performing the division by `space`. The intention is to see if this approach is faster or slower than the direct division method. **Options Compared** The two approaches being compared are: * Direct integer division: `const remaining = Math.floor(data / space)` * Subtracting the remainder: `const remaining = Math.floor((data - clipped) / space)` Pros and Cons of Each Approach: 1. **Direct Integer Division** * Pros: + Simple to understand and implement. + Less chance of introducing additional errors or side effects. * Cons: + May be slower due to the overhead of the subtraction operation. 2. **Subtracting the Remainder** * Pros: + Could potentially be faster if the subtraction is optimized by the JavaScript engine. * Cons: + More complex and may introduce additional errors or side effects. **Library and Special JS Features** Neither test case uses any external libraries or special JavaScript features. The tests only rely on built-in JavaScript functionality. **Other Considerations** To get a better understanding of the benchmark results, it's essential to consider factors like: * Hardware: The device's CPU architecture, clock speed, and number of cores can affect performance. * Browser version and engine: Different versions of Firefox have varying levels of optimization for integer division operations. * Data distribution: The distribution of `data` values can impact the performance of the tests. For example, if `data` is often close to multiples of `space`, the subtraction approach might be slower. **Alternatives** To measure JavaScript performance, you could use other benchmarking frameworks or tools, such as: 1. **Benchmark.js**: A popular benchmarking library for Node.js and browser environments. 2. **Benchmarks.io**: A platform for running benchmarks and comparing performance across different environments. 3. **jsperf**: An old but still widely used benchmarking tool for JavaScript. Keep in mind that each benchmarking tool has its strengths and weaknesses, and the choice of which one to use depends on your specific needs and goals.
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