flecs

Highlights

• Small release to fix a few bugs that got identified shortly after releasing 4.1.3

Release notes

This version includes the following bugfixes:

• [core] Revert change for supporting types with destructive move semantics (caused crash)
• [core] Fix issues with ordered children trait and nested prefabs -...

Highlights

• Improved RAM utilization (create fewer component records, reclaim more data from component vectors, smaller entity administration)
• A new Building Flecs manual!

Release notes

This version includes the following bugfixes:

• [core] Fix issue with reparenting named ordered children
• [core] Fix issue with...

Highlights

• The C++ API now needs to be compiled as C++17!
• Lots of bugfixes for the new DontFragment storage
• New API and explorer dashboard for detailed memory statistics

<img width="1800" height="1206" alt="Screenshot 2025-10-28 at 10 54 05 AM" src="https://github.com/user-attachments/assets/9bef4dc8-a6f5-44d3-a0fe-70...

Highlights

• 2x faster trivial set() calls (no hooks, observers or change detection)
• 5x faster trivial modified() calls (no hooks, observers or change detection)
• 3x faster prefab instantiation due to new component overriding design
• Lots of reflection improvements for arrays, vectors and enums with custom underlying types
• Lots of explorer improvements (better autocomplete, drag-...

Release announcement

https://ajmmertens.medium.com/flecs-4-1-is-out-fab4f32e36f6

Release notes

This version includes the following bugfixes:

• [core] Add missing FLECS_API to ecs_get_path_w_sep_buf
• [core] Fix issue with component toggling in multithreaded apps
• [core] Fix issue where not having a default ctor would mark copy/move ctor as invalid
• [core] Fix iss...