Flecs v3.2.2

Highlights

• New entity index data structure which improves performance of create/delete/add/remove by 10-20%
• Replaced hash implementation with wyhash, improving table creation performance by 15-30%
• Graph visualization of queries in the explorer!

Release notes

This version includes the following bugfixes:

• Fix issue where assert would trigger during (component) id deletion
• Fix issue with detecting redeclared variables in flecs script
• Fix incorrect value of EcsTypeKindLast
• Fix issue with creating query on entity that already has an existing query
• Fix potential crash in ecs_iter_fini when using chained iterators
• Fix issue where observer could cause emplace to return invalid pointer
• Fix issue where With pair would assume type of pair target
• Fix inconsistencies in enum constant registration between C and C++ APIs
• Fix issues with symmetric relationships and recycled ids
• Add missing ecs_rule_var_count, ecs_rule_var_name and ecs_rule_var_is_entity functions (thanks @copygirl!)
• Fix inconsistent naming of desc size constants
• Fix issue where id record could get deleted twice during world cleanup
• Fix incorrect JSON serialization of pair ids
• Fix bug in query creation with recycled relationship id
• Add missing imports to monitor module
• Fix assert when iterating rule with 0 source
• Fix possible leak when reassigning system/observer ctx/binding_ctx
• Fix crash in ecs_pipeline_stats_get when obtaining stats for pipeline with one task system

This version includes the following improvements:

• [cpp] Don't compile ECS_FUNC_* marco's for C code (thanks @aganm!)
• [cpp] Add component::constant overload that works with enum classes
• [cpp] Remove entity_view::delta_time function
• [cpp] Change argument of enable_rest to HTTP port
• [c] Remove unnecessary sep variable initialization in ecs_new_from_path_w_sep (thanks @copygirl!)
• [c] Add port member to ecs_app_desc_t
• [http] use non-blocking socket for recv which increases stability for servers with many clients
• [docs] Add note on pipeline switching performance
• [docs] Update outdated cascade example in quickstart
• [docs] Fix incorrect comment for iterable::each (thanks @ZeroErrors!)
• [docs] Fix error in quickstart example
• [json] Improve error handling of JSON iterator serializer
• [rest] Propagate serialization errors to REST endpoints
• [rest] Log errors that happen while replying to REST request to console
• [metrics] Improved logic for deriving metric name from enum constant in untyped_component::metric
• [internals] Implement new entity index data structure
• [internals] Replace hash function with wyhash
• [portability] Emulate POSIX atomics for systems that do not have GNU builtins (thanks @aganm!)
• [portability] Add compiler support for tinycc (thanks @aganm!)
• [ci] Add vs2017 job to CI

Benchmark results
https://github.com/SanderMertens/ecs_benchmark/tree/7bb9d7cf672f0b5991b5faff4f5f8cc5afcd94ef

Breaking changes:

• The entity_view::delta_time method has been removed (#466 (comment))
• The argument of app_builder::enable_rest has changed (#466 (comment))

Known issues:
#969
#965
#844
#765
#714
#620
#478
#314

Full Changelog: v3.2.1...v3.2.2