# Moving to 64bit by Default

DevFeed: [Moving to 64bit by Default](<https://devfeed.tech/articles/moving-to-64bit-by-default-19382.md>)

Original publisher: [Read original article](<https://www.codenameone.com/blog/moving-to-64bit-by-default/>)

Author: Shai Almog

Published: 2017-02-08T00:00:00Z

Content type: release

Language: en

Sources: [CodeName One](<https://devfeed.tech/sources/codename-one.md>)

Topics: [iOS](<https://devfeed.tech/topics/ios.md>), [build performance](<https://devfeed.tech/topics/build-performance.md>), [Development](<https://devfeed.tech/topics/development.md>)

Tags: [app-development](<https://devfeed.tech/tags/app-development.md>), [build](<https://devfeed.tech/tags/build.md>), [developers](<https://devfeed.tech/tags/developers.md>), [ios](<https://devfeed.tech/tags/ios.md>)

## AI overview

Codename One will build 64-bit iOS versions by default, including debug builds. The change addresses Apple warnings shown for apps built without 64-bit support; users with older 32-bit devices can explicitly disable it.

## Source excerpt

When building an iOS debug version of the app we only build a 32bit version to save build time. Otherwise the build will take almost twice as long as every file would be compiled twice. This worked well and was also fast enough. However, Apple started sending warnings to old 32bit apps and mistakes our apps as such. The crux of the issue is Apple forcing developers to support 64 bit, we already support it and have for years. But now Apple is showing a warning on apps built without 64 bit support even if they are only meant for debug.