Everything
php
Learn Community Releases The PHP Project
Home » Project » Newsgroups » php.internals » array_merge() vs array unpacking performance »

array_merge() vs array unpacking performance

php.internals

David Rodrigues

4 years ago
Hello! PHP 8.1 supports array unpacking with keys. I guess that is very similar to array_merge(), but for some reason array_merge() is 50% slower than unpacking. So my question is: is there some way to optimize the engine so array_merge() can work like unpacking? Thanks!

Kamil Tekiela

4 years ago
Hi David, It would be useful if you could provide your measurements and the way you arrived at such results. A quick test doesn't seem to support your findings: https://3v4l.org/v5m9f#v8.1.8 There are already a number of optimizations in array_merge. It might depend on the actual test data that you used. Maybe a specific path needs to be optimized. Please provide some more details. Regards, Kamil

David Rodrigues

4 years ago
> There are already a number of optimizations in array_merge. It might
depend on the actual test data that you used. Maybe a specific path needs to be optimized. Please provide some more details. You are right. I do not know how I tested before, but actually, array_merge() is bit faster than array unpacking. Atenciosamente, David Rodrigues Em seg., 1 de ago. de 2022 às 14:45, Kamil Tekiela <tekiela246@gmail.com> escreveu: