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This post is auto-generated from RSS feed The Rust Programming Language Forum - Latest topics. Source: Conditionally Switch Between Rayon Parallel and Sequential Iteration Based on Collection Size?

I'm using Rayon to process a vector like this:

myvec.par_iter().filter_map(/* ... */).collect();

This works well. However, I'd like to automatically fall back to sequential iteration (iter()) when myvec has fewer than 5 items. Ideally, I want something like:

myvec.conditional_iter(5).filter_map(/* ... */).collect();

Does Rayon provide built-in functionality for this? I implemented custom types/traits to handle filter_map/collect, but I’ll need to re-implement most Iterator methods. I’m wondering if I missed an existing solution.

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