Why does Clojure hang after having performed my calculations?

Question

I\'m experimenting with filtering through elements in parallel. For each element, I need to perform a distance calculation to see if it is close enough to a target point. Ne

Answer 1

You need to call shutdown-agents to kill the threads backing the threadpool used by pmap.

About pfilter, it should work but run slower than filter, since your predicate is simple. Parallelization isn't free so you have to give each thread moderately intensive tasks to offset the multithreading overhead. Batch your items before filtering them.