Integrated: 8299444 java.util.Set.copyOf allocates needlessly for empty input collections

Thu Jan 26 18:19:28 UTC 2023

On Wed, 4 Jan 2023 14:41:20 GMT, Viktor Klang <duke at openjdk.org> wrote:

> Currently Set.copyOf allocates both a HashSet and a new empty array when the input collection is empty.
> 
> This patch avoids allocating anything for the case where the parameter collection's isEmpty returns true.

This pull request has now been integrated.

Changeset: a2a77033
Author:    Viktor Klang <viktor.klang at oracle.com>
Committer: Stuart Marks <smarks at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/a2a7703370caf07afd88b5cfe44e1a78eed699e9
Stats:     10 lines in 3 files changed: 6 ins; 0 del; 4 mod

8299444: java.util.Set.copyOf allocates needlessly for empty input collections

Reviewed-by: rriggs, shade, smarks

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PR: https://git.openjdk.org/jdk/pull/11847