fastify/fast-json-stringify
Fast Json Stringify
fast-json-stringify is a high-performance JSON serialization library that uses JSON Schema to compile optimized functions for converting JavaScript objects into strings. It serves as a schema-based JSON serializer that generates specialized serialization logic to outperform standard stringification methods.
The project provides capabilities to export standalone serialization code to files for direct execution and supports schema reference resolution to eliminate logic duplication. It allows for the deactivation of character escaping for trusted data to reduce overhead and includes specific optimizations for the serialization of large arrays.
The library also manages data validation and transformation, including the application of default values, required field validation, and the serialization of complex data types such as dates and big integers. It provides diagnostic tools for debugging by outputting generated code and validator instances.
Features
- High-Performance JSON Encoders - Uses schema-based compilation to convert JavaScript objects into JSON strings faster than standard methods.
- API Response Optimizations - Reduces server response latency by pre-compiling serialization logic into optimized functions.
- Complex Data Serialization - Provides specialized serialization support for non-primitive data types like dates and big integers.
- Schema-Driven Output Formatting - Ensures outgoing data adheres to specific types and requirements during conversion to strings.
- High-Performance String Conversions - Compiles schemas into optimized routines for converting data types into strings with minimal overhead.
- Serialization Overhead Reduction - Minimizes serialization overhead in high-throughput environments to reduce overall system latency.
- Schema-Based Logic Generation - Generates specialized serialization logic based on a schema to outperform standard JSON stringification.
- Custom Stringification Functions - Allows custom control over how specific types like dates and big integers are converted to strings.
- JSON Schema Converters - Transforms JSON Schema definitions into highly optimized executable serialization functions.
- Specialized Function Synthesis - Generates a specialized function based on a schema to convert data objects into strings efficiently.
- Schema Reference Resolution - Supports resolving internal and external pointers within JSON schemas to eliminate logic duplication.
- Serialization Logic Generators - Generates optimized, standalone serialization functions based on JSON schemas for high-performance data conversion.
- Large Array Serialization Optimizations - Implements specific optimizations for oversized arrays to prevent performance degradation during JSON serialization.
- Serialization Constraint Enforcement - Verifies required fields and applies conditional logic using pattern-based rules during serialization.
- Escaping Deactivation - Allows disabling character escaping for trusted strings to reduce serialization overhead and increase throughput.
- Standalone Serialization Export - Exports standalone serialization code to files for direct execution without reprocessing schemas.
- Escaping Deactivation - Disables character escaping for trusted data formats to accelerate the overall serialization process.
- Schema Default Values - Inserts predefined fallback values into the output when specified fields are missing from the input data.
- Pattern-Based Property Mapping - Converts properties not explicitly listed in the schema using regular expression patterns or generic type definitions.
- Required Field Enforcement - Triggers errors during the serialization process if fields marked as required are missing.
- Additional Property Filtering - Filters or strips properties from the output based on strict schema rules or pattern-based inclusions.
- JSON and Data Schema Tools - High-performance JSON stringification.
