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if-else vs switch4
(version: 0)
Comparing performance of:
Switch case vs if-else
Created:
2 years ago
by:
Registered User
Go to the latest result
Tests:
Switch case
const a = 1; switch (a) { case 5: console.log("a is 5"); break; case 4: console.log("a is 4"); break; case 3: console.log("a is 4"); break; }
if-else
const a = 1; if (a == 5) { console.log("a is 5"); } else if (a == 4) { console.log("a is 4"); } else if (a == 3) { console.log("a is 4"); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Switch case
if-else
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser/OS:
Chrome 120 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=497983" width="100%" height="500px"></iframe>
Switch case
208.8M/s
if-else
184.0M/s
View exact numbers
Test name
Executions per second
✓
Switch case
208,756,192 Ops/sec
if-else
184,000,848 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark JSON and explain what is being tested. **Benchmark Definition** The benchmark definition is a simple script that checks the execution time of two different conditional statements: `switch` and `if-else`. The script defines a constant `a` with value 1, and then uses both constructs to check if `a` equals 3, 4, or 5. If the condition is true, it logs a message to the console. **Script Preparation Code** There is no script preparation code provided for this benchmark, which means that the test environment will be set up automatically when running the benchmark. **Html Preparation Code** Similarly, there is no html preparation code provided, which suggests that the benchmark is focused on measuring the execution time of the JavaScript code itself, without considering any UI-related overhead. **Individual Test Cases** The benchmark consists of two individual test cases: 1. **Switch Case**: This test case uses a `switch` statement to check if `a` equals 3, 4, or 5. 2. **if-else**: This test case uses an `if-else` chain to check if `a` equals 3, 4, or 5. **Library and Special JS Features** Neither of the two test cases uses any external libraries. There are no special JavaScript features or syntax used in these examples, such as async/await, Promises, or destructuring assignments. **Comparison Options** The benchmark is comparing the execution time of the `switch` statement versus the `if-else` chain. This comparison is likely intended to test which construct is faster for this specific use case. **Pros and Cons of Each Approach** Here are some general pros and cons of each approach: * **Switch Statement**: + Pros: Can be more concise and expressive, especially when dealing with multiple cases. + Cons: May have slower performance due to the overhead of looking up the value in an array (switch table). * **if-else Chain**: + Pros: Generally faster, as it only requires a single lookup operation. + Cons: Can be more verbose and harder to read, especially for complex cases. **Other Considerations** When choosing between `switch` and `if-else`, consider the following: * Code readability: If readability is important, `if-else` might be a better choice, as it allows for clear and explicit condition checks. * Performance: For simple cases with few options, `switch` might be faster. However, for more complex cases or larger datasets, `if-else` might be more efficient. **Alternatives** If you're interested in exploring alternative approaches, here are a few options: * **Use Cases**: If the use case requires multiple conditional statements with different types of logic (e.g., string comparison vs. numeric comparison), consider using a library like `switch-case` or `if-else`. * **Template literals**: For more complex cases where you need to handle multiple conditions with variable values, consider using template literals and the `?.` operator. * **Object-based conditionals**: Some modern JavaScript implementations (e.g., ES2017+) offer object-based conditionals, which can simplify certain use cases. Keep in mind that these alternatives might not be relevant for simple cases like this benchmark.
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