Recipe for collection.toArray(new Foo[collection.size()])

[Bananeweizen]

When converting collections to arrays, many people still write collection.toArray(new Foo[collection.size()]) in an attempt to optimize the allocation of the new array. However, using ...new Foo[0] is not slower on current JVMs, and more easy to read. There should be some recipe to implement this cleanup.

Detailed technical background: https://shipilev.net/blog/2016/arrays-wisdom-ancients/

(And I'm not sure if I should instead raise a feature request, not a discussion topic)

[timtebeek]

Hi! Thanks for the suggestion (and other activities)! Fully agree with this suggestion; I'd logged that as a recipe suggestion here:

• Remove pre-sized arrays in calls to Collection.toArray() rewrite-static-analysis#84

If you want an easy way to search across issues for all OpenRewrite projects then I recommend:
https://github.com/orgs/openrewrite/projects/4/views/10

Hope that helps! We can continue the the discussion around this recipe in openrewrite/rewrite-static-analysis#84