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i++ vs ++i
(version: 0)
Comparing performance of:
++i vs i++
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var i = 0;
Tests:
++i
++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i; ++i;
i++
i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++; i++;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
++i
i++
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks! **What is being tested?** The provided JSON represents two individual test cases for a simple benchmark: `i++` and `++i`. The benchmark measures the performance difference between these two syntaxes, which increment an integer variable. **Options compared:** There are two options being compared: 1. **Pre-increment (`i++`)**: This increments the value of `i` before using it. 2. **Post-increment (`++i`)**: This increments the value of `i` after using it. **Pros and cons:** * Pre-increment (`i++`) has a potential advantage when used in certain situations, as it allows for shorter code and avoids the need to store the original value of `i`. However, this can lead to less readable code if not properly explained. * Post-increment (`++i`) is generally considered more idiomatic and easier to read, but it may result in slightly slower performance due to the extra operation. **Other considerations:** In JavaScript, both syntaxes are supported, but their behavior might vary depending on the interpreter or compiler. For example, some older JavaScript engines might optimize `i++` by reusing the temporary value of `i`, which could lead to incorrect results in certain cases. **Library usage:** None of the benchmark definitions use any external libraries. **Special JS features or syntax:** Neither test case uses any special JavaScript features or syntax beyond the two increment operators. **Other alternatives:** If you wanted to compare other increment syntaxes, some alternatives could include: * `++i` ( post-increment with a second increment) * `i += 1` * `i = i + 1` However, these alternatives would likely have similar performance characteristics to the original `++i` and `i++` syntaxes. Overall, this benchmark provides a simple yet interesting insight into the performance differences between two common increment operators in JavaScript.
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