Glaze¶

Extremely fast, in memory, JSON and reflection library for modern C++

One of the fastest JSON libraries in the world. Glaze reads and writes from object memory, simplifying interfaces and offering incredible performance.

Feature Shortlist¶

Pure, compile time reflection for structs
JSON RFC 8259 compliance with UTF-8 validation
Standard C++ library support
Header only
Direct to memory serialization/deserialization
Compile time maps with constant time lookups and perfect hashing
No exceptions (compiles with -fno-exceptions)
No runtime type information necessary (compiles with -fno-rtti)

Quick Example¶

struct my_struct {
    int i = 287;
    double d = 3.14;
    std::string hello = "Hello World";
    std::array<uint64_t, 3> arr = {1, 2, 3};
};

// Write JSON
my_struct s{};
std::string buffer = glz::write_json(s).value_or("error");

// Read JSON
auto s2 = glz::read_json<my_struct>(buffer);