Benchmark: object - key access vs object - key access(long key)

Script Preparation code:

var items = Array.from(Array(1000), (_, x) => ({
    key: 'abcd',
    value: x * 10
}));

var itemsLong = Array.from(Array(1000), (_, x) => ({
    key: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.',
    value: x * 10
}));

var objContainer = {};
var objContainerLongKeys = {};

for (let i = 100; i >= 0; i--) {
    const index = Math.floor(Math.random() * 1000);
    const item = items[index];
    objContainer[item.key] = item;
    objContainerLongKeys[itemsLong.key] = item;
}

Tests:

Object access
items.forEach(item => objContainer[item.value])
Object access (long key)
items.forEach(item => objContainerLongKeys[item.value])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object access
Object access (long key)

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.

Let's break down the benchmark and its components.

**Benchmark Definition JSON**

The provided JSON represents a JavaScript microbenchmark, where two test cases are compared: object access with short keys and object access with long keys.

**Test Case 1: Object Access (short key)**

This test case measures the performance of accessing an object using a short key. The `items` array contains objects with short keys (`key: 'abcd'`) and values that are multiples of 10. The benchmark definition is `items.forEach(item => objContainer[item.value])`, which iterates over the `items` array and uses the `objContainer` object to access the corresponding value.

**Test Case 2: Object Access (long key)**

This test case measures the performance of accessing an object using a long key. The `itemsLong` array contains objects with long keys (`key: 'Lorem ipsum dolor sit amet, ...'`) and values that are multiples of 10. The benchmark definition is similar to the first test case, but uses the `objContainerLongKeys` object: `itemsLong.forEach(item => objContainerLongKeys[item.value])`.

**Library and Purpose**

The `Array.from()` method is used to create arrays from iterables. This method is a part of the ECMAScript standard and is implemented by most modern JavaScript engines.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax used in this benchmark.

**Options Compared**

Two options are compared:

1. **Object Access with Short Keys**: This option uses short keys to access objects, which can be faster since the key is shorter and requires less memory allocation.
2. **Object Access with Long Keys**: This option uses long keys to access objects, which can be slower since the key is longer and requires more memory allocation.

**Pros and Cons**

**Short Key Option:**

Pros:

* Faster performance due to shorter keys
* Less memory allocation required

Cons:

* May lead to collisions if multiple short keys are used simultaneously
* May not work well with large datasets or complex object hierarchies

**Long Key Option:**

Pros:

* Can be safer since long keys are less likely to collide
* Works well with large datasets or complex object hierarchies

Cons:

* Slower performance due to longer keys
* Requires more memory allocation

**Other Considerations**

When choosing between these options, consider the following factors:

* **Data Distribution**: If your data is uniformly distributed and doesn't have a specific key length pattern, short key access might be faster. However, if your data has a long-tailed distribution or follows a specific key length pattern, long key access might be better.
* **Object Hierarchy**: If you're working with complex object hierarchies, long key access can help avoid collisions and improve performance.
* **Memory Constraints**: If memory is a concern, short key access can help reduce memory allocation overhead.

**Alternatives**

Other alternatives to these options include:

1. **Indexing**: Instead of using keys, use an indexing system where each object has a unique index that maps to its corresponding value.
2. **Hash Tables**: Use a hash table data structure to store and retrieve objects by their key values.
3. **Custom Data Structures**: Design custom data structures or algorithms that take into account the specific requirements of your application.

Keep in mind that the choice of alternative depends on the specific use case, performance requirements, and memory constraints of your application.

Related benchmarks:

object - key access vs object - key access(long key) (version: 0)

Comparing performance of: Object access vs Object access (long key)

Created: 4 years ago by: Guest

Jump to the latest result

Object access

Object access (long key)

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):