Other B4i v5.00 BETA has been released


B4X founder
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I'm happy to release B4i v5.00 BETA. This update includes significant performance improvements, in both debug mode and release mode, as well as other improvements.

  • Resumable subs in debug mode are optimized in the same way other subs are optimized. You can see the difference in this video (the video was taken with a B4A app, the improvement is the same in B4i):

  • Runtime performance improvements including: for loop optimizations, inlined methods, direct field access for properties and others.
    These improvements can make a huge difference in processor intensive tasks.
    As an example, the number of drawings per second with BitmapCreator:


    Draw smilies from BitmapCreator (skip blending): 81,000 per second
    Draw smilies from BitmapCreator (with blending): 700 per second


    Draw smilies from BitmapCreator (skip blending): 620,000 per second (7.5x)
    Draw smilies from BitmapCreator (with blending): 20,700 per second (30x)

    In most cases the difference will not be so large but it will still help your programs run faster.

  • Bit.ArrayCopy and FastArrayGet and Set methods that are useful when very fast access is required: https://www.b4x.com/android/forum/threads/fast-arrays-access.92951/
  • iXUI library v1.60 with B4XCanvas.MeasureText, DrawPath and DrawPathRotated.


  • xCustomListView and iBitmapCreator are included as internal libraries.
  • New File methods: CopyAsync, Copy2Async, ReadBytes, WriteBytes and ListFilesAsync.
  • Support for Xcode 9.3.
  • Libraries deprecation messages.
  • Other minor improvements including fixes for several debugger issues.

Users who are eligible for free upgrade will soon receive an email with link to the beta version. Please give it a try, many parts of the compiler were rewritten and it is better to catch errors during the beta stage...
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