do `get()` vals bloat the size of a class instance...

# getting-started

[y]

do get() vals bloat the size of a class instance?

[CLOVIS]

val foo: Int

is the exact same output binary than

val foo: Int
    get() = field

which are both slightly bigger than

private val foo: Int

(because that one doesn't have a getter at all)

[CLOVIS]

Though nowadays I don't think it should matter much

[y]

re: field example above, that's what I expected. thanks.
what about something like this?

class Foo(val a: Int, val b: Int) {
    val c: Int get() = a + b
}

[CLOVIS]

Exact same thing as

class Foo(val a: Int, val b: Int) {
    fun getC(): Int = a + b
}

[CLOVIS]

In IntelliJ, you can check yourself:
• Create a Kotlin file (only works for kotlin("jvm") projects)
• Tools → Kotlin → Show Kotlin bytecode
• Click on your Kotlin code
• Click on 'Decompile'
This will show you pseudo-Java code generated by your Kotlin code

[y]

my (admittedly very elementary) question is, does defining class methods increase the size of each instance of the class, or is that just another entry in a function table.

[CLOVIS]

All I can say is, the JVM has had 30 years of engineering into making that cheap, so it probably shouldn't matter either way

[Klitos Kyriacou]

Methods don't increase the size of each instance. They only increase the size of the Class, of which there is only one instance (e.g. Foo::class) no matter how many instances of the class you create. So it's negligible.

[y]

wonderful. thanks @Klitos Kyriacou

[y]

also thanks @CLOVIS