Was just catching up on the 1 3 announcement I m very excite kotlinlang #announcements

Channels

100daysofkotlin

100daysofkotlin-2021

algolialibraries

android-architecture

android-databinding

androidgithubprojects

androidx-xprocessing

arrow-contributors

beepiz-libraries

cincinnati-user-group

codemash-precompiler

codingconventions

competitive-programming

competitivecoding

compose-android

compose-desktop

compose-ui-showcase

connect-audit-events

cscenter-course-2016

domain-driven-design

effective-kotlin

effectivekotlin

embedded-kotlin

event21-community-content

fb-internal-demo

fluid-libraries

framework-elide

getting-started

github-workflows-kt

graviton-browser

image-processing

intellij-plugins

intellij-tricks

introduce-yourself

java-to-kotlin-refactoring

jhipster-kotlin

jvm-ir-backend-feedback

k2-early-adopters

kotest-contributors

kotlin-by-example

kotlin-data-storage

kotlin-foundation

kotlin-in-action

kotlin-multiplatform-contest

kotlin-pakistan

kotlinforbeginners

kotlingforbeginners

kotlinprogrammers

kotlintest-devs

kotlinultimatechallenge

kotlinx-datetime

lambdaworld_cadiz

language-evolution

language-proposals

leedskotlinusergroup

library-development

machinelearningbawas

myndocs-oauth2-server

navigation-architecture-component

ohio-kotlin-users

pattern-matching

pocketgitclient

practical-functional-programming

prozis-android-backup

python-contributors

realworldkotlin

refactoring-to-kotlin

refreshversions

russian-kotlinasfirst

skia-wasm-interop-temp

sofl-user-group

spring-security

squarelibraries

stayhungrystayfoolish

strife-discord-lib

swagger-gradle-codegen

swiss-user-group

tricity-kotlin-user-group

Title

t

Travis Griggs

10/30/2018, 8:53 PM

Was just catching up on the 1.3 announcement. I’m very excited about the unsigned ints stuff. I do a bit of protocol work. But I’m curious how they implement that on top of the JVM which does NOT have unsigned ints. Does anyone know? Are there performance implications?

d

Dominaezzz

10/30/2018, 9:00 PM

There are no performance implications. Except for division but even that is minimal.

k

karelpeeters

10/30/2018, 10:06 PM

They're implemented with inline classes, so no overhead there, and I image a bunch of https://www.hackersdelight.org/

internal fun uintDivide(v1: UInt, v2: UInt): UInt = (v1.toLong() / v2.toLong()).toUInt()

damm that's lame.

It's cooler for longs though: https://github.com/JetBrains/kotlin/blob/1d7ee22bdc2979dc20de7bcc364385ed283dc5d0/libraries/stdlib/unsigned/src/kotlin/UnsignedUtils.kt#L23

👍 1

2 Views

#announcements Join Slack