Sidebar let s discuss in thread please If I m initializing a kotlinlang #announcements

Sidebar, let's discuss in :thread-please:: If I'm ...

adam-mcneilly

04/20/2018, 1:05 PM

Sidebar, let's discuss in 🧵: If I'm initializing an empty list, is there a performance difference between

emptyList()

and

ArrayList()

adam-mcneilly

04/20/2018, 1:05 PM

They read the same to me, but idk if one is preferred.

04/20/2018, 1:05 PM

the former. always.

poohbar

04/20/2018, 1:06 PM

emptyList()

makes more sense to me

adam-mcneilly

04/20/2018, 1:06 PM

What's different?

diesieben07

04/20/2018, 1:06 PM

emptyList

is a constant and not mutable

diesieben07

04/20/2018, 1:06 PM

ArrayList

is a new, mutable list.

adam-mcneilly

04/20/2018, 1:06 PM

gotcha

➕ 1

poohbar

04/20/2018, 1:07 PM

emptyList()

returns

EmptyList

which is a singleton and should be faster than creating a new instance of array list.

adam-mcneilly

04/20/2018, 1:07 PM

Thanks all

Ayden

04/20/2018, 1:07 PM

Much appreciated. Lesson learnt.

poohbar

04/20/2018, 1:08 PM

checkout #C0B8MA7FA .. I am happy to assist

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