Benchmark: multi-condition - MeasureThat.net

Script Preparation code:

function _if(x){return x === 'foo' || x === 'bar'}
function _get(x){return {foo: 1, bar: 1}[x] || false}
function _in(x){return x in {foo: 1, bar: 1}}
function _has(x){return ['foo','bar'].includes(x)}
function _reg(x){return /(foo|bar)/.test(x)}

Tests:

condition
_if('nope'); _if('bar');
property fallback
_get('nope'); _get('bar');
IN
_in('nope'); _in('bar');
Array Includes
_has('nope'); _has('bar');
regex
_reg('nope'); _reg('bar');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
condition
property fallback
IN
Array Includes
regex

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the details of this benchmark.

**Benchmark Definition**

The provided JSON represents a JavaScript microbenchmark named "multi-condition". This benchmark tests different conditions in a JavaScript program to measure their execution performance.

Here are the options being compared:

1. `_if(x)`: A simple conditional statement that checks if `x` is equal to either 'foo' or 'bar'.
2. `_get(x)`: A function that returns an object with two properties: 'foo' and 'bar'. If `x` matches one of these values, it returns the corresponding property; otherwise, it returns `false`.
3. `_in(x)`: A function that checks if `x` is present as a key in the object `{ foo: 1, bar: 1 }`.
4. `_has(x)`: A function that uses the `includes()` method to check if `x` is present in an array of values (`['foo', 'bar']`).
5. `_reg(x)`: A regular expression that tests if `x` matches either 'foo' or 'bar'.

**Pros and Cons**

Here's a brief overview of each option:

1. `_if(x)`: This approach uses a simple conditional statement, which is easy to understand and implement. However, it might not be the most efficient way to perform these checks.
2. `_get(x)`: This approach returns an object with pre-defined properties, making it easy to check for specific values. However, this approach may be slower due to the function call overhead.
3. `_in(x)`: This approach uses a built-in method (`includes()`) to check for presence in an array. It's likely to be one of the faster approaches, as `includes()` is optimized for performance.
4. `_has(x)`: Similar to `_in(x)`, this approach uses a built-in method (`includes()`) and is likely to be efficient.
5. `_reg(x)`: This approach uses regular expressions, which can be slower than other methods due to the complexity of regex patterns.

**Library and Purpose**

In this benchmark, none of the functions use a specific JavaScript library beyond the basic `includes()` method for checking array presence. However, it's worth noting that using libraries like Lodash or Underscore.js could simplify some of these checks and potentially improve performance.

**Special JS Features**

There are no special JavaScript features used in this benchmark (e.g., async/await, promises, Web APIs).

**Alternatives**

Other alternatives to test these conditions could include:

1. Using a simple array-based approach: Instead of using the `_in(x)` and `_has(x)` functions, you could use a simple loop or `indexOf()` method to check for presence in an array.
2. Using regular expressions for multiple conditions: If you had more complex conditionals, you could use regular expressions to simplify them. However, this might not be the best approach for all cases, as regex can be slow and error-prone.

In summary, the "multi-condition" benchmark tests various ways of checking conditions in JavaScript, including simple conditional statements, object-based checks, and array-based checks. Each approach has its pros and cons, and understanding these nuances is crucial for optimizing performance-critical code.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36

Browser/OS: Chrome 95 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
condition	6276242.5 Ops/sec
property fallback	4955542.0 Ops/sec
IN	3850384.5 Ops/sec
Array Includes	5169316.0 Ops/sec
regex	4055579.8 Ops/sec

Related benchmarks:

multi-condition (version: 0)

Comparing performance of: condition vs property fallback vs IN vs Array Includes vs regex

Created: 3 years ago by: Guest

Jump to the latest result

condition

property fallback

IN

Array Includes

regex

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):