svector
A compact C++ small vector implementation using tagged pointers for stack-allocated storage with minimal overhead.
What is svector?
ankerl::svector is a C++ small vector container that stores elements directly on the stack for small sizes, avoiding heap allocations. It uses a tagged pointer design to achieve an extremely compact memory footprint—as low as 8 bytes—while providing the full API of std::vector. The project solves the problem of memory overhead in small vector implementations, offering a lightweight alternative to libraries like absl::InlinedVector and boost::small_vector.
C++ developers working on performance-sensitive applications, embedded systems, or memory-constrained environments who need efficient small vector containers with minimal overhead.
Developers choose ankerl::svector for its unparalleled memory efficiency—it has the smallest size and overhead among small vector implementations—while maintaining competitive performance. Its compatibility with std::vector's API makes it easy to integrate, and its stack allocation reduces heap usage for small collections.
Overview
Compact SVO optimized vector for C++17 or higher
Use Cases
Best For
- Reducing memory overhead in C++ applications with many small vectors
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