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# Objective Fixes #6689. ## Solution Add `single-threaded` as an optional non-default feature to `bevy_ecs` and `bevy_tasks` that: - disable the `ParallelExecutor` as a default runner - disables the multi-threaded `TaskPool` - internally replace `QueryParIter::for_each` calls with `Query::for_each`. Removed the `Mutex` and `Arc` usage in the single-threaded task pool.  ## Future Work/TODO Create type aliases for `Mutex`, `Arc` that change to single-threaaded equivalents where possible. --- ## Changelog Added: Optional default feature `multi-theaded` to that enables multithreaded parallelism in the engine. Disabling it disables all multithreading in exchange for higher single threaded performance. Does nothing on WASM targets. --------- Co-authored-by: Carter Anderson <mcanders1@gmail.com> |
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bevy_tasks
A refreshingly simple task executor for bevy. :)
This is a simple threadpool with minimal dependencies. The main usecase is a scoped fork-join, i.e. spawning tasks from
a single thread and having that thread await the completion of those tasks. This is intended specifically for
bevy as a lighter alternative to rayon for this specific usecase. There are also utilities for
generating the tasks from a slice of data. This library is intended for games and makes no attempt to ensure fairness
or ordering of spawned tasks.
It is based on async-executor, a lightweight executor that allows the end user to manage their own threads.
async-executor is based on async-task, a core piece of async-std.
Dependencies
A very small dependency list is a key feature of this module
├── async-executor
│ ├── async-task
│ ├── concurrent-queue
│ │ └── cache-padded
│ └── fastrand
├── num_cpus
│ └── libc
├── parking
└── futures-lite