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JS if statement perf
(version: 0)
Benchmark of the speed difference between using multiple IF statements and an open-ended IF/ELSE IF.
Comparing performance of:
if/if vs if/else if vs simple
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var test = {} var sum = 0;
Tests:
if/if
if (test) { sum+=1 }
if/else if
if (test) { sum+=1 } else if (test) { sum+=2 }
simple
sum+=1
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
if/if
if/else if
simple
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
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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 the performance difference between using multiple `IF` statements (e.g., `if (test) { sum+=1 }`) and an open-ended `IF/ELSE IF` construct (e.g., `if (test) { sum+=1 } else if (test) { sum+=2 }`). The goal is to determine which approach is faster. **Options Compared** The benchmark compares two options: 1. **Multiple `IF` statements**: This involves writing multiple `IF` conditions with the same condition being evaluated multiple times. ```javascript if (test) { sum += 1; } if (test) { // second iteration sum += 1; // duplicate increment } ``` 2. **Open-ended `IF/ELSE IF` construct**: This involves using a single `IF` statement with an `ELSE IF` clause to conditionally execute code. **Pros and Cons** * **Multiple `IF` statements**: + Pros: Easy to understand, straightforward implementation. + Cons: Inefficient due to redundant evaluations. * **Open-ended `IF/ELSE IF` construct**: + Pros: Can be more efficient if the conditions are similar and can be reused. + Cons: May require more complex logic and harder to maintain. **Library and Special JavaScript Features** There is no library used in this benchmark. However, it does use a special JavaScript feature called **short-circuit evaluation**, which allows the interpreter to optimize the condition `if (test)` by evaluating it only once, regardless of whether the result is `true` or not. This is an optimization technique that helps reduce the number of evaluations. **Other Considerations** The benchmark uses a simple test case where the variable `sum` is incremented twice in each iteration. In a real-world scenario, the conditions being evaluated might be more complex, and the performance difference between these two approaches might become less noticeable. As for alternatives, there are other benchmarking frameworks available that can run JavaScript benchmarks, such as: * JSPerf * BenchmarkJS * Microbenchmark However, MeasureThat.net is a specialized platform designed specifically for running JavaScript microbenchmarks.
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