@jsonjoy.com/codegen

A no-dependencies, low-level, high-performance JIT code generation package for JavaScript. This package contains utilities for generating optimized JavaScript code at runtime. It enables creating high-performance functions by generating code dynamically based on schemas, templates, or runtime data.

Features

• Zero dependencies - Lightweight and fast to install
• High performance - Generates optimized JavaScript functions at runtime
• Type safe - Full TypeScript support with comprehensive type definitions
• Flexible - Supports various code generation patterns and techniques
• Production ready - Battle-tested and optimized for real-world usage

Use Cases

JIT (Just-In-Time) code generation can provide significant performance improvements when you have advance knowledge of the data structure or execution pattern.

Some examples:

• Deep equality comparison function: When one object is known in advance, we can generate an optimized function that efficiently compares against a single object. This technique is implemented in the json-equal library.

• JSON Patch execution: When the JSON Patch operations are known beforehand, we can generate an optimized function that applies the patch in the most efficient way. This approach is used in the json-patch library.

• Schema-based validation: Given a json-type schema of a JSON object, it's possible to generate highly optimized functions for validation and serialization that avoid generic overhead and execute significantly faster than traditional approaches.

Other:

• Optimized validation and serialization functions
• Custom function generation based on runtime data
• Performance-critical code that benefits from JIT compilation

Installation

npm install @jsonjoy.com/codegen

Quick Start

import { Codegen } from '@jsonjoy.com/codegen';

const codegen = new Codegen();
// Add your code generation logic here
const optimizedFunction = codegen.compile();

License

Apache-2.0