Benchmark: 4 random values out of 100 || vs hash lookup

Script Preparation code:

// Math.floor(Math.random() * (maximum – minimum + 1)) + minimum
var value = Math.floor(Math.random() * (99 - 0 + 1)) + 0

Tests:

||
return value === 0 || value === 49 || value === 50 || value === 99
hash
let hash = { 0: true , 49: true , 50: true , 99: true } return !!hash[value]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
\|\|
hash

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's dive into the benchmark test case.

**Overview**
The test case compares two approaches to check if a value is equal to one of four predefined values: 0, 49, 50, and 99.

**Approach 1: Using `||` operator (|| Test Case)**

This approach uses the logical OR (`||`) operator to check if the `value` is equal to any of the predefined values. The `||` operator returns `true` as soon as it finds a match.

**Pros and Cons**

* **Pros**: This approach is simple, concise, and easy to understand.
* **Cons**: This approach can be slower than other approaches because it uses a loop-like behavior to check multiple conditions. Additionally, if the value is not equal to any of the predefined values, the `||` operator will return `false` without providing any indication that no match was found.

**Approach 2: Using Hash Lookup (Hash Test Case)**

This approach creates an object (`hash`) with the predefined values as keys and sets their corresponding values to `true`. It then checks if the `value` exists in the `hash` object using the `!!` operator. If it finds a match, it returns `true`.

**Pros and Cons**

* **Pros**: This approach is generally faster than the `||` operator because it uses a direct lookup, which can reduce the number of comparisons required.
* **Cons**: This approach requires more code and may be less intuitive for some developers.

**Library/Function Used**
In the Hash Test Case, the library used is JavaScript's built-in object syntax (i.e., `let hash = { ... }`). The purpose of this syntax is to create a new object with key-value pairs.

**Special JS Feature/Syntax**
There is no special JavaScript feature or syntax used in these test cases. Both approaches only use standard JavaScript operators and syntax.

**Other Alternatives**

Alternative approaches that could be considered for this benchmark include:

1. **Using an array**: Instead of using the `||` operator, you could create an array with the predefined values and check if the `value` exists in the array using the `includes()` method.
2. **Using a switch statement**: You could use a switch statement to check which predefined value matches the `value`.
3. **Using a custom function**: You could create a custom function that takes the `value` as an argument and checks if it matches any of the predefined values.

These alternative approaches might have different performance characteristics, readability, or maintainability compared to the current `||` operator and Hash Lookup approaches.

Related benchmarks:

4 random values out of 100 || vs hash lookup (version: 0)

Comparing performance of: || vs hash

Created: 2 years ago by: Guest

Jump to the latest result

||

hash

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):