Benchmark: weather - MeasureThat.net

Script Preparation code:

var obj = {
    '15': 1,
    '60': 2,
    '80': 3,
    '90': 4,
    '100': 9
  };

var array= [
  { rate: 15, weatherId: 1},
  { rate: 60, weatherId: 2},
  { rate: 80, weatherId: 3},
  { rate: 90, weatherId: 4},
  { rate: 100, weatherId:  9}
];

Tests:

object.keys
var a; var objIter = Object.keys(obj) for (const rate of objIter) { if ( 85 <= +rate) { a = obj[rate]; break; } }
array.find
var a = array.find(function(row){ return row.rate <= 85 });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object.keys
array.find

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and test cases, explaining what is tested, the pros and cons of different approaches, and other considerations.

**Benchmark Definition:**

The benchmark definition represents a JavaScript microbenchmark that tests two different ways to find an element in an array or object:

1. `object.keys`
2. `array.find`

The script preparation code defines an object `obj` with key-value pairs, where the keys are numbers and the values are integers. It also creates an array `array` with objects containing a `rate` property and a `weatherId` property.

**Script Preparation Code:**
```javascript
var obj = {
  '15': 1,
  '60': 2,
  '80': 3,
  '90': 4,
  '100': 9
};

var array = [
  { rate: 15, weatherId: 1 },
  { rate: 60, weatherId: 2 },
  { rate: 80, weatherId: 3 },
  { rate: 90, weatherId: 4 },
  { rate: 100, weatherId: 9 }
];
```
**Html Preparation Code:** None

The script preparation code defines two variables: `obj` and `array`. These variables are used in the benchmark definition.

**Individual Test Cases:**

There are two individual test cases:

1. **object.keys**
```javascript
var objIter = Object.keys(obj)
for (const rate of objIter) {
  if (85 <= +rate) {
    a = obj[rate];
    break;
  }
}
```
This test case uses the `Object.keys()` method to iterate over the keys of the `obj` object. It then checks if the key is greater than or equal to 85, and assigns the corresponding value to the variable `a`. If a match is found, the loop breaks.

2. **array.find**
```javascript
var a = array.find(function(row) { return row.rate <= 85 });
```
This test case uses the `Array.prototype.find()` method to find the first element in the `array` that satisfies the condition `row.rate <= 85`. The result is assigned to the variable `a`.

**Test Results:**

The latest benchmark result shows two test cases with different execution counts:

1. **object.keys**: ExecutionsPerSecond = 1211941.75
2. **array.find**: ExecutionsPerSecond = 13614391.0

**Pros and Cons of Different Approaches:**

* `object.keys`:
	+ Pros: Simple, easy to understand, and widely supported.
	+ Cons: May be slower than using an array method like `find()`, as it involves iterating over the object's keys and then looking up the value in the original object.
* `array.find()`:
	+ Pros: More efficient than using `object.keys()`, as it only iterates over the elements of the array, not the object's keys.
	+ Cons: May require additional dependencies (e.g., ES6+ syntax), and may be less familiar to developers who don't use arrays.

**Other Considerations:**

* The benchmark definition uses a simple data structure (`obj` and `array`) that is easy to understand. More complex data structures or algorithms might make the benchmark more difficult to analyze.
* The test cases only check for equality, which might not cover all possible scenarios (e.g., checking for existence instead of equality).
* The benchmark results are specific to Chrome 72 on a Macintosh with an Intel processor.

**Alternatives:**

Other alternatives to `object.keys()` and `array.find()` include:

* Using `for...in` loops or `for...of` loops to iterate over the object's keys or array elements.
* Using more advanced data structures, such as sets or maps, that might be faster for certain operations.
* Using specialized libraries or frameworks that provide optimized implementations of common algorithms.

Related benchmarks:

weather (version: 0)

Comparing performance of: object.keys vs array.find

Created: 7 years ago by: Guest

Jump to the latest result

object.keys

array.find

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):