Benchmark: Random Getters - MeasureThat.net

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js'></script>

Script Preparation code:

var obj = {
  a: {
    b: {
      c: {
        foo: {
          bar() {
            return '42'
          }
        }
      }
    }
  }
}

function getProp1(list, obj) {
  const selector = list.split('.')
  if (arguments.length === 1) return _obj => getProp1(list, _obj)

  for (const prop of selector) {
    if (obj[prop]) {
      obj = obj[prop]
    }
  }

  return obj
}

function getProp2(list, obj) {
  const selector = list.split('.')
  const lengthof = selector.length
  if (arguments.length === 1) return _obj => getProp2(list, _obj)

  for (const prop of selector) {
    if (obj[prop]) {
      obj = obj[prop]
    }
  }
  
  
  for (let i = 0; i < lengthof; i++) {
    if (obj[selector[i]]) {
      obj = obj[prop]
    }
  }

  return obj
}

function getProp3(list, obj) {
  const selector = list.split('.')
  if (arguments.length === 1) return _obj => getProp3(list, _obj)

  for (const i in selector) {
    if (obj[selector[i]]) {
      obj = obj[selector[i]]
    }
  }

  return obj
}

function path(list, obj){
  if (arguments.length === 1) return _obj => path(list, _obj)

  if (obj === null || obj === undefined){
    return undefined
  }
  let willReturn = obj
  let counter = 0

  const pathArrValue = typeof list === 'string' ? list.split('.') : list

  while (counter < pathArrValue.length){
    if (willReturn === null || willReturn === undefined){
      return undefined
    }
    willReturn = willReturn[ pathArrValue[ counter ] ]
    counter++
  }

  return willReturn
}

Tests:

Lodash
_.get('a.b.c.foo.bar', obj)
Mine
getProp1('a.b.c.foo.bar')(obj)
Mine2
getProp2('a.b.c.foo.bar')(obj)
Mine3
getProp3('a.b.c.foo.bar')(obj)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash
Mine
Mine2
Mine3

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Benchmark Description**

The benchmark tests how to access nested properties in an object using different approaches. The test case uses a JSON object with several levels of nesting, represented by the string "a.b.c.foo.bar".

**Approaches Compared**

There are four approaches compared:

1. **Lodash (`_.get('a.b.c.foo.bar', obj)`)**: Lodash is a popular JavaScript library that provides a function `get()` to access nested properties in an object.
2. **`getProp1('a.b.c.foo.bar')(obj)`**: This approach uses a custom function `getProp1()` that splits the property path into an array and iterates over it, accessing each property in turn.
3. **`getProp2('a.b.c.foo.bar')(obj)`**: Similar to `getProp1()`, but with a different iteration logic.
4. **`getProp3('a.b.c.foo.bar')(obj)`**: This approach uses another custom function `getProp3()` that iterates over the property path using `for...in`.

**Pros and Cons**

* **Lodash (`_.get()`)**: Pros:
	+ Concise and readable code.
	+ Fast and efficient, thanks to Lodash's optimized implementation.
*   Cons:
	+ Adds external dependency (Lodash library).
*   **`getProp1()`**, **`getProp2()`,** and **`getProp3()`**: Pros:
	+ No external dependencies.
	+ Can be customized for specific use cases.
*   Cons:
	+ Code can be more verbose and harder to read.
	+ May be slower than Lodash's implementation due to custom iteration logic.

**Other Considerations**

* The benchmark measures the execution speed of each approach, which is influenced by factors like JavaScript engine optimizations, caching, and the specific hardware platform.
* The use of a large object with many nested properties makes it harder for the benchmark to measure performance differences between approaches.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for common tasks, such as array manipulation, string formatting, and more. In this case, the `get()` function is used to access nested properties in an object.

The `_.get()` function takes two arguments: the property path (e.g., "a.b.c.foo.bar") and the object to access (in this case, `obj`). It returns the value of the property at that path.

**Special JS Feature/Syntax**

None mentioned.

Related benchmarks:

Random Getters (version: 4)

Comparing performance of: Lodash vs Mine vs Mine2 vs Mine3

Created: 6 years ago by: Registered User

Jump to the latest result

Lodash

Mine

Mine2

Mine3

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):