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Checks whether the current thread is running in parallel.
Roblox runs most code on one serial thread. Code inside an Actor that has called task.desynchronize() runs in parallel instead - it is desynchronized. task.synchronize() brings that thread back to serial. is_parallel() reports which side the thread that calls it is on right now. A parallel thread can read values from the game, but it cannot change some of them. Call is_parallel() before a write and run task.synchronize() first if it returns true.
  • Parallel Luau - Roblox multithreading concepts: Actors, desynchronize, synchronize.

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Returns

boolean - true if the calling thread is currently parallel, false if it is serial.

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Aliases

  • isparallel

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Example

Always check parameters and return values when working with this library function.