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Is switch bad?
(version: 0)
Comparing performance of:
switch vs not switch
Created:
4 years ago
by:
Guest
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Tests:
switch
const adversario = 'Hulk' let loki = 'Loki' switch(adversario) { case 'Iron-Man': loki = 'Magneto' break; case 'Hulk': loki = 'Thanos' break; case 'Thor': loki = 'Odin' break; default: return loki } console.log(loki)
not switch
const adversario = 'Hulk' const LOKI_DISFRACES = { 'Iron-Man': 'Magneto', Thor: 'Odin', Hulk: 'Thanos', Lobezno: 'Magneto' } const LOKI_DEFAULT_DISFRAZ = 'Loki' const loki = LOKI_DISFRACES[adversario] || LOKI_DEFAULT_DISFRAZ; console.log(loki)
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Suite status:
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Test case name
Result
switch
not switch
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**What is being tested?** The provided JSON represents two benchmark test cases for measuring the performance of JavaScript code on different approaches to handle string lookups. In the first test case, `switch`, the code uses a traditional `switch` statement to check the value of the variable `adversario`. If the value matches one of the specified cases, it assigns a new value to `loki` and breaks out of the loop. If no match is found, it returns the original value. In the second test case, `not switch`, the code uses an object-based approach to look up the value in an array of key-value pairs. It first checks if the key (`adversario`) exists in the object; if it does, it assigns the corresponding value to `loki`. If not, it falls back to a default value. **Options compared** The two approaches being tested are: 1. **Traditional switch statement** 2. **Object-based lookup using `in` operator or bracket notation** **Pros and Cons of each approach:** * **Traditional Switch Statement:** * Pros: * Simple, readable code * Works well for small number of cases * Cons: * Performance can be slower due to the overhead of multiple `case` checks and potential fallthrough behavior * Can lead to code bloat if there are many cases * **Object-based Lookup:** * Pros: * Fast lookups using the `in` operator or bracket notation * Allows for flexible key-value pairs without adding complexity * Cons: * Requires manual key management (e.g., handling typos or missing keys) * May lead to more complex code if not implemented carefully **Library and its purpose** None of the provided test cases uses a library. However, it's worth noting that `in` operator or bracket notation is a standard JavaScript feature. **Special JS feature or syntax** There isn't any special JS feature or syntax mentioned in these test cases. They are straightforward implementations of traditional switch statements and object-based lookups. **Other Alternatives** If the goal was to optimize string lookups, some alternative approaches could be considered: * **Hash table**: Creating a hash table (e.g., using `Map` or `WeakMap`) for storing key-value pairs can provide fast lookups. * **String interpolation**: Using template literals or other string interpolation methods can reduce the overhead of concatenation or dynamic string creation. Keep in mind that each approach has its trade-offs, and the best choice depends on the specific use case, performance requirements, and code readability goals.
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