ESP32 PSRAM std::vector Allocator

🚀 Overview

This repository provides a custom allocator to enable std::vector to use PSRAM (Pseudo Static RAM) on ESP32. By default, C++ STL containers allocate memory in DRAM, which is limited. With this allocator, large dynamic structures can efficiently reside in PSRAM.

🎯 Why Use PSRAM?

• Ideal for large data structures exceeding internal RAM.
• Avoids heap fragmentation by managing memory efficiently.
• Supports large buffers for graphics, sensor data, AI models, and more.

⚠️ Limitations

• Not all STL containers are well-suited for PSRAM.
• Works best with contiguous memory allocations like std::vector.
• Node-based structures (std::map, std::unordered_map) may not perform optimally due to PSRAM’s large allocation preference.

🔧 Setup & Usage

🛠️ Prerequisites

• ESP32 with PSRAM support enabled in the board configuration.
• Arduino framework (ESP-IDF users can adapt accordingly).