Haskell STM vs MVar: Which to Use?
An example of an AI chatbot conversation about Haskell's STM and MVar concurrency models.
What are the main differences between Haskell's STM and MVar?
Haskell's STM (Software Transactional Memory) provides composable memory transactions, while MVar is a mutable variable for synchronization.
When should I use STM over MVar?
Use STM when you need composability and atomicity for multiple operations. MVar is better for simpler, low-level synchronization.
Can you give an example of using STM?
Sure! Here's a simple example: you can use atomically to perform multiple reads and writes in a single transaction.
What about performance? Is one faster than the other?
STM can introduce overhead due to its transactional nature, but it often leads to simpler code. MVar can be faster for simple cases.
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