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Test Shifting vs Div
(version: 0)
Comparing performance of:
Normal Div Operation vs Right Shifting
Created:
5 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var a = 10
Tests:
Normal Div Operation
a / 2
Right Shifting
a >> 1
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Normal Div Operation
Right Shifting
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help explain the JavaScript microbenchmark on MeasureThat.net. **What is being tested?** The benchmark tests two different operations: 1. A simple division operation: `a / 2` 2. A right shifting operation: `a >> 1` In both cases, the variable `a` is initialized with a value of 10. **Options compared** There are two options compared: A) Normal Division Operation (`a / 2`) B) Right Shifting Operation (`a >> 1`) The benchmark compares the performance of these two operations in terms of the number of executions per second. **Pros and Cons of each approach** 1. **Normal Division Operation (a / 2)**: * Pros: Widely supported by most JavaScript engines, easy to understand and implement. * Cons: May have slower performance compared to other options due to the division operation. 2. **Right Shifting Operation (a >> 1)**: * Pros: Can be faster than division operations for certain types of data, especially large integers. * Cons: Not all JavaScript engines support bitwise shifting, and some may interpret it differently. **Library used** None. **Special JS feature or syntax** The right shifting operation (`a >> 1`) uses the `>>` operator, which is a bitwise shift operator. This allows the variable `a` to be shifted one bit position to the right, effectively dividing it by 2. **Other considerations** When comparing performance between division and shifting operations, other factors come into play: * Data type: The size of the numbers being operated on can affect performance. * Processor architecture: Some processors may optimize for certain types of arithmetic operations over others. * Browser support: Different browsers may have varying levels of optimization or support for certain features. **Other alternatives** If you're looking to compare different JavaScript operation benchmarks, other options might include: * Adding and subtracting two numbers (`a + b` vs. `b - a`) * Performing multiplication and division operations with large integers * Comparing the performance of different mathematical libraries or engines (e.g., V8, SpiderMonkey)
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