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Switch true vs if else
(version: 0)
Comparing performance of:
switch vs if else
Created:
5 years ago
by:
Guest
Go to the latest result
Script Preparation code:
hi = { 1: 3, 4: 7, 2: 999 }; a=1; b=3;
Tests:
switch
switch (true) { case (a in hi): console.log('wow'); break; default: console.log('nope'); } a = (a>1000) ? 0 : ++a
if else
if (a in hi) { console.log('wow'); } else { console.log('nope'); } a = (a>1000) ? 0 : ++a
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
switch
if else
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Browser/OS:
Chrome 130 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=566085" width="100%" height="500px"></iframe>
if else
358K/s
switch
356K/s
View exact numbers
Test name
Executions per second
✓
if else
357,897 Ops/sec
switch
356,127 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **Benchmark Definition** The benchmark is testing two different approaches to handle conditional statements: `switch` and `if-else`. The benchmark definition provides a script that contains a variable `a` initialized to 1, and an object `hi` with key-value pairs (e.g., `hi = {1: 3, 4: 7, 2: 999}`). The benchmark defines two test cases: 1. **switch**: Using the `switch` statement, it checks if the value of `a` is present in the object `hi`. If a match is found, it logs "wow" to the console and breaks out of the loop. If no match is found, it logs "nope". 2. **if-else**: Using the `if-else` statement, it checks if the value of `a` is present in the object `hi`. If a match is found, it logs "wow" to the console. If not, it logs "nope". **Options Compared** The benchmark is comparing the performance of two approaches: 1. **switch**: This approach uses a lookup table (the object `hi`) to determine which value in the object corresponds to the current value of `a`. 2. **if-else**: This approach checks if the value of `a` matches any key in the object `hi` using an `in` operator. **Pros and Cons** * **switch**: + Pros: Can be faster when dealing with a fixed set of values, as it uses a lookup table. + Cons: May not perform well if the number of possible values is large or constantly changing. * **if-else**: + Pros: Can handle variable numbers of cases and can be flexible in its logic. + Cons: Can be slower than `switch` due to the overhead of the `in` operator and potential branching. **Library Usage** The benchmark uses a library for logging messages to the console. The exact library is not specified, but based on the code, it appears to be using the built-in `console.log()` function provided by JavaScript's web APIs. **Special JS Feature or Syntax** There are no special features or syntax used in this benchmark beyond what's required for standard JavaScript execution. **Other Considerations** When considering the performance of these two approaches, keep in mind that the use case and expected values can greatly impact the performance. For example, if `a` is likely to be within a specific range of values (e.g., 1-100), `switch` might be faster than `if-else`. On the other hand, if `a` can take on any value, including very large or small numbers, `if-else` might be more suitable. **Alternatives** Other alternatives to consider when dealing with conditional statements include: * Using a more specialized data structure, such as an array of values and their corresponding logic. * Implementing custom caching mechanisms to reduce lookup times. * Utilizing parallel processing or multi-threading to handle large sets of cases concurrently.
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