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AbsoluteLayout recalculates its bounds on every children bounds changes and greatly impacts performance.
Created attachment 9123 [details]
I have tried to reproduce this issue by following three scenarios as mentioned in attachment.
But I am unable to reproduce this issue. Could you please have a look and let me know if I have to follow some other steps.
And if possible could you please attach sample in which you are getting this issue and provide IDE logs via help-> open log directory-IDE Log.
Screencast : http://www.screencast.com/t/6HgSbbeDazvp
Environment Info:=== Xamarin Studio ===
Version 5.5.4 (build 15)
Installation UUID: 3d25a767-a003-4a7d-9f5e-e57987cf6cf0
Mono 3.10.0 ((detached/92c4884)
GTK+ 2.24.23 (Raleigh theme)
Package version: 310000031
=== Apple Developer Tools ===
Xcode 6.1 (6602)
=== Xamarin.Mac ===
Version: 188.8.131.52 (Enterprise Edition)
=== Xamarin.Android ===
Version: 184.108.40.206 (Enterprise Edition)
Android SDK: /Users/mac360_xamarin/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
2.1 (API level 7)
2.2 (API level 8)
2.3 (API level 10)
3.1 (API level 12)
4.0.3 (API level 15)
4.4 (API level 19)
5.0 (API level 21)
Java SDK: /usr
java version "1.7.0_71"
Java(TM) SE Runtime Environment (build 1.7.0_71-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode)
=== Xamarin.iOS ===
Version: 220.127.116.11 (Enterprise Edition)
Build date: 2014-11-16 21:03:22-0500
=== Build Information ===
Release ID: 505040015
Git revision: f93940a35458a18052f1a25e106e62ca970d9c40
Build date: 2014-11-19 15:32:41-05
Xamarin addins: dc23cbd91a3a0e1d326328e1229e86c942a49ec8
=== Operating System ===
Mac OS X 10.10.0
Darwin mac360-xamarins-Mac-mini.local 14.0.0 Darwin Kernel Version 14.0.0
Fri Sep 19 00:26:44 PDT 2014
There is some optimization done here now, but we could do more.
AbsoluteLayout does not skip invisible children during LayoutChildren as is recommended and is also how StackLayout and Grid do. Doing so would greatly improve layout performance.