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sfdfsdf434343
(version: 0)
Comparing performance of:
1 vs 2 vs 3
Created:
2 years ago
by:
Registered User
Go to the latest result
Tests:
1
let i = 10000; while (i--) { var o, n, t; o = 5; n = 5; if(o !== n) t = o = n; t = undefined; o = 5; n = 6; if(o !== n) t = o = n; t = undefined; o = 5; n = 5; if(o !== n) t = o = n; }
2
let i = 10000; while (i--) { var o, n, t; o = 5; n = 5; if(o !== (o = n)) t = n; t = undefined; o = 5; n = 6; if(o !== (o = n)) t = n; t = undefined; o = 5; n = 5; if(o !== (o = n)) t = n; }
3
let i = 10000; while (i--) { var o, n, t; o = 5; n = 5; (o !== (o = n)) && (t = n); t = undefined; o = 5; n = 6; (o !== (o = n)) && (t = n); t = undefined; o = 5; n = 5; (o !== (o = n)) && (t = n); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
1
2
3
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
Browser/OS:
Chrome 126 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=532747" width="100%" height="500px"></iframe>
2
395/s
1
394/s
3
388/s
View exact numbers
Test name
Executions per second
✓
2
395 Ops/sec
1
394 Ops/sec
3
388 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**What is being tested?** The provided benchmark tests the execution performance of JavaScript code in a loop, specifically focusing on the assignment and comparison operations within a while loop. **Options compared:** There are three test cases with different approaches: 1. **Traditional assignment**: `let i = 10000; while (i--) { var o, n, t; ... if(o !== n) t = o = n; }` * In this approach, the value of `o` is assigned to `n` using the traditional assignment syntax (`o = n`). 2. **Short-circuit assignment**: `let i = 10000; while (i--) { var o, n, t; ... if(o !== (o = n)) t = n; }` * In this approach, the value of `o` is assigned to `n` using the short-circuit assignment syntax (`o = n`). The comparison `o !== (o = n)` is evaluated first, and if true, then `t = n`. 3. **Conditional short-circuit assignment**: `let i = 10000; while (i--) { var o, n, t; ... (o !== (o = n)) && (t = n); }` * In this approach, the value of `o` is assigned to `n` using the short-circuit assignment syntax (`o = n`). The comparison `o !== (o = n)` is evaluated first, and if true, then the condition `(o !== (o = n)) && (t = n)` is evaluated. If both conditions are true, then `t = n`. **Pros and cons of each approach:** 1. Traditional assignment: * Pros: Simple and straightforward. * Cons: May lead to unnecessary reassignments when a new value is not needed. 2. Short-circuit assignment: * Pros: Reduces unnecessary reassignments and can improve performance. * Cons: Requires understanding of the short-circuit behavior, which may not be immediately obvious to some developers. 3. Conditional short-circuit assignment: * Pros: Combines the benefits of both approaches (reduced reassignments and clear condition) while making it explicit that only when `o !== n` is true should `t = n`. * Cons: May lead to slightly more complex code. **Other considerations:** * The test cases cover different scenarios, such as assignment, comparison, and potential errors (e.g., `t = undefined;`). * The benchmark uses Chrome 126, which may not be the most up-to-date browser version. * It's worth noting that this benchmark only tests the execution performance of the code within a while loop and does not account for other factors like memory usage or garbage collection. **Libraries and features used:** The test cases use standard JavaScript features without any external libraries. However, if we consider the broader context of web development, it's likely that the developer using this benchmark is familiar with modern web technologies, such as ES6+ syntax, async/await, and possibly some utility functions. **Special JS feature or syntax:** The only notable feature used in these test cases is the short-circuit assignment (`o = n`), which allows for more efficient code execution by avoiding unnecessary assignments. This syntax was introduced in ECMAScript 2015 (ES6) as a way to simplify conditional expressions and improve performance. **Alternatives:** If you were to create your own benchmarking tool, you might consider the following alternatives: * Use a more comprehensive testing framework like Jest or Mocha. * Include additional metrics, such as memory usage or garbage collection overhead. * Support multiple browsers and platforms for more realistic testing scenarios. * Consider using a just-in-time (JIT) compiler or a ahead-of-time (AOT) compiler to optimize the benchmarking process. * Use a more robust benchmarking algorithm that can handle variable-length loops, conditional statements, and other complex code structures.
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