Benchmark: localstorage and jsonparse

Script Preparation code:

localStorage.setItem('foo', JSON.stringify({"sessionId":"0aa0f100-35b2-4746-bb3d-29de4b78441b","sessionStartTime":1639703249923,"lastActivityTime":1639703249923,"isFirstSession":false,"hasMeaningfulAction":false}))

Tests:

Control
var FOO = 'bar';
localStorage
var FOO = localStorage.getItem('foo');
localstorage and parse
var FOO = JSON.parse(localStorage.getItem('foo'));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Control
localStorage
localstorage and parse

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36 Edg/96.0.1054.57

Browser/OS: Chrome 96 on Windows

View result in a separate tab

Test name	Executions per second
Control	1065694784.0 Ops/sec
localStorage	1995721.5 Ops/sec
localstorage and parse	766635.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark data.

**Overview**

The MeasureThat.net website allows users to create and run JavaScript microbenchmarks. The provided JSON represents two benchmark definitions:

1. `localStorage and jsonparse`: This benchmark tests how quickly different browsers can parse a JSON string from local storage.
2. Three individual test cases: `Control`, `localStorage`, and `localstorage and parse`. These test cases compare the performance of parsing a simple variable assignment, accessing local storage directly, and parsing the result of `localStorage.getItem()`.

**Benchmark Definition**

The first benchmark definition tests two options:

1. `localStorage`: This option uses the `localStorage` API to store and retrieve data.
2. `localstorage and parse`: This option builds upon the previous one by parsing the stored JSON string using `JSON.parse()`. The goal is to measure the performance difference between these two approaches.

**Options Compared**

The benchmark compares the following options:

1. **Control**: No local storage or parsing involved.
2. **localStorage**: Directly accesses and uses local storage.
3. **localstorage and parse**: Uses local storage, parses the stored JSON string using `JSON.parse()`.

**Pros and Cons**

Here's a brief analysis of each option:

* **Control**: This option serves as a baseline for performance comparison. It doesn't involve any external resources or parsing, making it a straightforward test.
	+ Pros: Simple, fast execution
	+ Cons: Doesn't measure the impact of local storage and parsing on performance
* **localStorage**: Directly accessing and using local storage is common in web applications.
	+ Pros: Simulates real-world usage
	+ Cons: May introduce overhead due to network latency, storage access, and parsing
* **localstorage and parse**: This option builds upon the previous one by adding an additional parsing step.
	+ Pros: More realistic representation of common use cases
	+ Cons: Introduces extra overhead due to parsing

**Library**

In this benchmark, `JSON.parse()` is used as a library. The purpose of this function is to parse a JSON string into a JavaScript object.

**Special JS Features or Syntax**

There are no special JS features or syntax mentioned in the provided benchmark definition.

**Other Alternatives**

If you wanted to create alternative benchmarks, you could consider the following:

* Compare different parsing libraries (e.g., `JSON.parse()` vs. `JSON.at()`)
* Test the performance of various local storage APIs (e.g., `localStorage`, `sessionStorage`, `IndexedDB`)
* Create a benchmark that simulates more complex scenarios, such as parsing JSON data from an external source or handling errors during parsing.

These alternative benchmarks could provide valuable insights into different aspects of JavaScript performance and help developers make informed decisions when working with local storage and parsing in their applications.

Related benchmarks:

localstorage and jsonparse (version: 0)

Comparing performance of: Control vs localStorage vs localstorage and parse

Created: 3 years ago by: Guest

Jump to the latest result

Control

localStorage

localstorage and parse

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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