Benchmark: NodeJs in-memory-cache mechanism

Tests:

Object cache

const CHUNK_SIZE = 100000;
const cache = {};


for (let i = 0; i < CHUNK_SIZE; i++) {
	if (i % 2 === 0) {
  	cache[i] = JSON.stringify({ TzId: i, Name: `Tz${i}`});
  }
}

for (let i = 0; i < CHUNK_SIZE; i++) {
  if (cache.hasOwnProperty(i)) {
		console.log(cache[i]);
  } else {
    console.log('empty');
  }
}

​x
 
const CHUNK_SIZE = 100000;const cache = {};​​for (let i = 0; i < CHUNK_SIZE; i++) {    if (i % 2 === 0) {    cache[i] = JSON.stringify({ TzId: i, Name: `Tz${i}`});  }}​for (let i = 0; i < CHUNK_SIZE; i++) {  if (cache.hasOwnProperty(i)) {        console.log(cache[i]);  } else {    console.log('empty');  }}

Map cache

const CHUNK_SIZE = 100000;
const cache = new Map();

for (let i = 0; i < CHUNK_SIZE; i++) {
	if (i % 2 === 0) {
  	cache.set(i, JSON.stringify({ TzId: i, Name: `Tz${i}`}));
  }
}

for (let i = 0; i < CHUNK_SIZE; i++) {
  if (cache.has(i)) {
		console.log(cache.get(i));
  } else {
    console.log('empty');
  }
}

 
const CHUNK_SIZE = 100000;const cache = new Map();​for (let i = 0; i < CHUNK_SIZE; i++) {    if (i % 2 === 0) {    cache.set(i, JSON.stringify({ TzId: i, Name: `Tz${i}`}));  }}​for (let i = 0; i < CHUNK_SIZE; i++) {  if (cache.has(i)) {        console.log(cache.get(i));  } else {    console.log('empty');  }}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
Object cache
Map cache

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 14 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Windows

View result in a separate tab

Test name	Executions per second
Object cache	3.0 Ops/sec
Map cache	2.8 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

Let's dive into the benchmark and explain what's being tested.

The provided JSON represents two test cases, each measuring the performance of an in-memory caching mechanism in Node.js. The two mechanisms being compared are:

Object Cache: This uses a plain JavaScript object (cache) to store key-value pairs.
Map Cache: This uses a JavaScript Map data structure to store key-value pairs.

What's being tested?

In both cases, the benchmark creates an array of 100,000 elements and iterates over it, storing some values in the cache (every second element). The test then measures how quickly the cached values can be retrieved from the cache. Specifically, it checks if a value is present in the cache by using hasOwnProperty or has() methods for the object cache and map respectively.

Options Compared:

The two options are:

Object Cache: uses a plain JavaScript object to store key-value pairs.
- Pros:
  - Simple implementation
  - Fast lookups (O(1) average case)
- Cons:
  - Limited size, as the cache is stored in memory
  - No built-in support for keys that require special handling
Map Cache: uses a JavaScript Map data structure to store key-value pairs.
- Pros:
  - More flexible than objects (e.g., can handle keys with complex types)
  - Larger cache size, as Maps are designed to be more memory-efficient
- Cons:
  - More complex implementation
  - May have slower lookups due to the overhead of the Map data structure

Library and Purpose:

The JSON.stringify() function is used to serialize objects into a string format, which can be stored in the cache. The purpose of this function is to ensure that the cached values can be properly stored and retrieved.

No special JavaScript features or syntax are required for these benchmarks.

Other Considerations:

Cache size: Both test cases create large caches (100,000 elements), which may impact performance.
JavaScript engine optimization: The results may vary depending on the specific JavaScript engine used by the browser.
Device and platform variations: The benchmark results may differ between different devices, platforms, and browsers.

Alternatives:

Other caching mechanisms that could be tested in a similar way include:

Using a library like LRU Cache or Memcached
Implementing a custom caching mechanism using a different data structure (e.g., a binary search tree)
Testing the performance of caching mechanisms in other programming languages, such as Python or Java

LLMs can make mistakes. Check important info.

Let's dive into the benchmark and explain what's being tested.

The provided JSON represents two test cases, each measuring the performance of an in-memory caching mechanism in Node.js. The two mechanisms being compared are:

1. **Object Cache**: This uses a plain JavaScript object (`cache`) to store key-value pairs.
2. **Map Cache**: This uses a JavaScript `Map` data structure to store key-value pairs.

**What's being tested?**

In both cases, the benchmark creates an array of 100,000 elements and iterates over it, storing some values in the cache (every second element). The test then measures how quickly the cached values can be retrieved from the cache. Specifically, it checks if a value is present in the cache by using `hasOwnProperty` or `has()` methods for the object cache and map respectively.

**Options Compared:**

The two options are:

* **Object Cache**: uses a plain JavaScript object to store key-value pairs.
	+ Pros:
		- Simple implementation
		- Fast lookups (O(1) average case)
	+ Cons:
		- Limited size, as the cache is stored in memory
		- No built-in support for keys that require special handling
* **Map Cache**: uses a JavaScript `Map` data structure to store key-value pairs.
	+ Pros:
		- More flexible than objects (e.g., can handle keys with complex types)
		- Larger cache size, as `Map`s are designed to be more memory-efficient
	+ Cons:
		- More complex implementation
		- May have slower lookups due to the overhead of the `Map` data structure

**Library and Purpose:**

The `JSON.stringify()` function is used to serialize objects into a string format, which can be stored in the cache. The purpose of this function is to ensure that the cached values can be properly stored and retrieved.

No special JavaScript features or syntax are required for these benchmarks.

**Other Considerations:**

* **Cache size**: Both test cases create large caches (100,000 elements), which may impact performance.
* **JavaScript engine optimization**: The results may vary depending on the specific JavaScript engine used by the browser.
* **Device and platform variations**: The benchmark results may differ between different devices, platforms, and browsers.

**Alternatives:**

Other caching mechanisms that could be tested in a similar way include:

* Using a library like LRU Cache or Memcached
* Implementing a custom caching mechanism using a different data structure (e.g., a binary search tree)
* Testing the performance of caching mechanisms in other programming languages, such as Python or Java

Related benchmarks:

NodeJs in-memory-cache mechanism (version: 0)

Comparing performance of: Object cache vs Map cache

Created: one year ago by: Guest

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