Snippets created by Jon Harrop
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Dictionary safe for concurrent reads
A fixed-size hash table of Maps. Adding and removing key-value pairs replaces one Map in the spine of the hash table. Threads can read from this collection concurrently while a single thread is writing into it. I created this as a response to the recent thread by Ayende Rahien about the performance of purely functional dictionaries. According to my measurements this collection is 3x slower to build and 2x slower to search than a thread-unsafe .NET Dictionary but it provides the thread safety he requires. However, the built-in .NET ConcurrentDictionary is slightly faster than this and provides stronger thread-safety guarantees.
11 people like this
Like the snippet!Posted: 10 years ago by Jon Harrop
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Async vs sync benchmark
Quick benchmark to compare the throughput performance of F# MailboxProcessor using asynchronous workflows and a synchronous agent using a lock and busy loop. The latter is 9x faster on this machine.
3 people like this
Like the snippet!Posted: 5 years ago by Jon Harrop