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checking truthy array length
(version: 0)
Comparing performance of:
array length vs array length not 0 vs array length > 0
Created:
2 years ago
by:
Guest
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Script Preparation code:
var arr = [];
Tests:
array length
if (arr.length) { console.log(1); } else { console.log(0); }
array length not 0
if (arr.length !== 0) { console.log(1); } else { console.log(0); }
array length > 0
if (arr.length > 0) { console.log(1); } else { console.log(0); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
array length
array length not 0
array length > 0
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 break down the benchmark and explain what's being tested. **Benchmark Purpose:** The purpose of this benchmark is to measure the performance of JavaScript code that checks the length or non-zero value of an array using different conditional statements. **Options Compared:** 1. `if (arr.length) { ... }`: This option uses a simple if-statement with a single condition (`arr.length`). 2. `if (arr.length !== 0) { ... }`: This option uses a more specific if-statement with two conditions (`arr.length !== 0`). 3. `if (arr.length > 0) { ... }`: This option uses another type of if-statement with three conditions (`arr.length > 0`). **Pros and Cons:** * Simple if-statements like the first one are concise but may be slower due to the overhead of evaluating a single condition. * More specific if-statements like the second one may be faster since they evaluate fewer conditions, but at the cost of increased code complexity. * The third option is likely to be fast since it evaluates only one comparison. **Library and Special JS Features:** There are no libraries or special JavaScript features used in this benchmark. **Other Considerations:** * The use of `console.log` statements for output may impact performance, as they can introduce additional overhead. * The benchmark's results are likely to be influenced by factors such as the specific JavaScript engine, browser version, and device platform being tested. **Alternative Approaches:** For comparison, other approaches could involve: * Using a more expressive or concise syntax, such as "if (arr.length) { ... }" instead of "if (arr.length > 0 && arr.length !== 0) { ... }" * Comparing the performance of different array lengths or sizes * Testing the performance of alternative data structures, such as arrays with non-numeric values Overall, this benchmark is designed to evaluate the performance differences between simple and more specific if-statements when checking array length.
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array.length = 0 vs []
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