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MAUI iOS sample app size regression compared to .NET7 #79825

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MAUI iOS sample app size regression compared to .NET7#79825
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kotlarmilosLeVladIonescu
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area-Codegen-AOT-monosize-reductionIssues impacting final app size primary for size sensitive workloads
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9.0.0
@ivanpovazan

Description

@ivanpovazan
ivanpovazan
opened on Dec 19, 2022

Size regression for MAUI iOS apps

MAUI sample app dotnet new maui -n "MyMauiApp" has regressed in size compared to the .NET7 release:

  • Unzipped archive: .app directory size regressed around 78.5% from 40598192 to 72477624 bytes
  • Application archive: .ipa file size regressed around 74% from 13074853 to 22755931 bytes

when compared against dotnet/runtime main branch at: a92c5bc

Linked issues

Similar size regressions have been reported for the Mono sample app and WASM here:

for which the following issues have been detected as the ones causing the regressions:

Repro steps

  1. Check out dotnet/runtime repository into a local dir (<some_repo_dir> will be used as a placeholder further):
git clone https://github.com/dotnet/runtime.git <some_repo_dir>
  1. Build dotnet/runtime for iOS:
cd <some_repo_dir>
./build.sh mono+libs -c Release -os iOS -arch arm64
  1. Download and install dotnet 7.0.100 from https://dotnet.microsoft.com/en-us/download/dotnet/7.0
  2. Make sure 7.0.100 is the one on the path
cd ~/
dotnet --version
7.0.100
  1. Install maui workload
sudo dotnet workload install maui --source https://api.nuget.org/v3/index.json
  1. Create a sample MAUI app
dotnet new maui -n "MyMauiApp"
cd MyMauiApp
  1. Adjust the app project by adding the following Target in MyMauiApp.csproj file:
<Target Name="UpdateRuntimePackAndAOTCompiler" 
	AfterTargets="ResolveFrameworkReferences"
	Condition="'$(UseCurrentMainBranch)' == 'true'" >
	<Error Condition="'$(DotnetRuntimeRepo)' == ''" Text="You must specify the location of your dotnet/runtime repository via -p:DotnetRuntimeRepo=&lt;some_repo_dir&gt;"/>
	<ItemGroup>
		<!-- update runtime pack to local build -->
		<ResolvedRuntimePack PackageDirectory="$(DotnetRuntimeRepo)/artifacts/bin/microsoft.netcore.app.runtime.ios-arm64/Release"
			Condition="'%(ResolvedRuntimePack.FrameworkName)' == 'Microsoft.NETCore.App'" />
		<!-- remove AOT compiler reference for ios-arm64 -->
		<MonoAotCrossCompiler Remove="@(MonoAotCrossCompiler)"
			Condition="%(RuntimeIdentifier) == 'ios-arm64'" />
		<!-- update AOT compiler reference to local build -->
		<MonoAotCrossCompiler Include="$(DotnetRuntimeRepo)/artifacts/bin/mono/iOS.arm64.Release/cross/ios-arm64/mono-aot-cross">
			<RuntimeIdentifier>ios-arm64</RuntimeIdentifier>
		</MonoAotCrossCompiler>
	</ItemGroup>
</Target>
  1. Build the project to get sizes for .NET7 release:
dotnet publish -c Release -f net7.0-ios -r ios-arm64 --self-contained -bl -p:_RequireCodeSigning=false
  1. Inspect .ipa file and .app folder sizes:
ls -al bin/Release/net7.0-ios/ios-arm64/publish/MyMauiApp.ipa
ls -al bin/Release/net7.0-ios/ios-arm64/MyMauiApp.app
  1. Now build the project against the locally built runtime - current main from step (2) by:
  • passing the project property DotnetRuntimeRepo with the path to your local dotnet/runtime directory (instead of the <some_repo_dir> placeholder)
  • passing the project property UseCurrentMainBranch with the value true

in the following way:

rm -rf bin obj
dotnet publish -c Release -f net7.0-ios -r ios-arm64 --self-contained -bl -p:_RequireCodeSigning=false -p:DotnetRuntimeRepo="<some_repo_dir>" -p:UseCurrentMainBranch=true
  1. Repeat inspection of the file/folder sizes from step (9)

Size on disk comparison (in bytes)

# File name Size net7 release (b) Size current main (b) Diff (%)
1 AboutAssets.txt 656 656 0,00%
2 Assets.car 50424 50424 0,00%
3 Info.plist 1424 1424 0,00%
4 MauiSplash.storyboardc 160 160 0,00%
5 Microsoft.Extensions.Configuration.Abstractions.aotdata.arm64 920 920 0,00%
6 Microsoft.Extensions.Configuration.Abstractions.dll 5632 5632 0,00%
7 Microsoft.Extensions.Configuration.aotdata.arm64 53928 179512 232,87%
8 Microsoft.Extensions.Configuration.dll 9728 9728 0,00%
9 Microsoft.Extensions.DependencyInjection.Abstractions.aotdata.arm64 7448 178512 2296,78%
10 Microsoft.Extensions.DependencyInjection.Abstractions.dll 13312 13312 0,00%
11 Microsoft.Extensions.DependencyInjection.aotdata.arm64 123976 253960 104,85%
12 Microsoft.Extensions.DependencyInjection.dll 25600 25600 0,00%
13 Microsoft.Extensions.Logging.Abstractions.aotdata.arm64 44640 184584 313,49%
14 Microsoft.Extensions.Logging.Abstractions.dll 12800 12800 0,00%
15 Microsoft.Extensions.Logging.aotdata.arm64 60832 188192 209,36%
16 Microsoft.Extensions.Logging.dll 13312 13312 0,00%
17 Microsoft.Extensions.Options.aotdata.arm64 10840 10832 -0,07%
18 Microsoft.Extensions.Options.dll 12288 12288 0,00%
19 Microsoft.Extensions.Primitives.aotdata.arm64 3936 3920 -0,41%
20 Microsoft.Extensions.Primitives.dll 7168 7168 0,00%
21 Microsoft.Maui.Controls.Xaml.aotdata.arm64 97120 243424 150,64%
22 Microsoft.Maui.Controls.Xaml.dll 74240 74240 0,00%
23 Microsoft.Maui.Controls.aotdata.arm64 914264 1056064 15,51%
24 Microsoft.Maui.Controls.dll 1038336 1038336 0,00%
25 Microsoft.Maui.Essentials.aotdata.arm64 62792 197168 214,00%
26 Microsoft.Maui.Essentials.dll 30720 30720 0,00%
27 Microsoft.Maui.Graphics.aotdata.arm64 142944 308936 116,12%
28 Microsoft.Maui.Graphics.dll 114688 114688 0,00%
29 Microsoft.Maui.aotdata.arm64 384816 534872 38,99%
30 Microsoft.Maui.dll 386048 386048 0,00%
31 Microsoft.iOS.aotdata.arm64 325264 461264 41,81%
32 Microsoft.iOS.dll 497664 497664 0,00%
33 MyMauiApp 29000688 56731120 95,62%
34 MyMauiApp.aotdata.arm64 9464 181840 1821,39%
35 MyMauiApp.dll 18432 18432 0,00%
36 OpenSans-Regular.ttf 107184 107184 0,00%
37 OpenSans-Semibold.ttf 111068 111068 0,00%
38 PkgInfo 8 8 0,00%
39 System.Collections.Concurrent.aotdata.arm64 74544 207520 178,39%
40 System.Collections.Concurrent.dll 13312 13312 0,00%
41 System.Collections.NonGeneric.aotdata.arm64 1312 1312 0,00%
42 System.Collections.NonGeneric.dll 7168 7168 0,00%
43 System.Collections.Specialized.aotdata.arm64 1392 1584 13,79%
44 System.Collections.Specialized.dll 8192 8192 0,00%
45 System.Collections.aotdata.arm64 6952 7208 3,68%
46 System.Collections.dll 8192 8192 0,00%
47 System.ComponentModel.Primitives.aotdata.arm64 2096 178344 8408,78%
48 System.ComponentModel.Primitives.dll 9216 9216 0,00%
49 System.ComponentModel.TypeConverter.aotdata.arm64 16544 192896 1065,96%
50 System.ComponentModel.TypeConverter.dll 49664 49664 0,00%
51 System.ComponentModel.aotdata.arm64 856 856 0,00%
52 System.ComponentModel.dll 4608 4608 0,00%
53 System.Console.aotdata.arm64 46432 195856 321,81%
54 System.Console.dll 8704 8704 0,00%
55 System.Diagnostics.TraceSource.aotdata.arm64 2416 2416 0,00%
56 System.Diagnostics.TraceSource.dll 8704 8704 0,00%
57 System.Drawing.Primitives.aotdata.arm64 4856 175960 3523,56%
58 System.Drawing.Primitives.dll 7168 7168 0,00%
59 System.Drawing.aotdata.arm64 808 808 0,00%
60 System.Drawing.dll 4608 4608 0,00%
61 System.Linq.Expressions.aotdata.arm64 499248 610776 22,34%
62 System.Linq.Expressions.dll 120320 120320 0,00%
63 System.Linq.aotdata.arm64 121560 275264 126,44%
64 System.Linq.dll 22528 22016 -2,27%
65 System.Memory.aotdata.arm64 824 824 0,00%
66 System.Memory.dll 4608 4096 -11,11%
67 System.Net.Http.aotdata.arm64 130696 311760 138,54%
68 System.Net.Http.dll 61440 61952 0,83%
69 System.Net.Primitives.aotdata.arm64 1424 1432 0,56%
70 System.Net.Primitives.dll 8704 8704 0,00%
71 System.Net.Requests.aotdata.arm64 928 928 0,00%
72 System.Net.Requests.dll 5632 5632 0,00%
73 System.Net.Security.aotdata.arm64 888 888 0,00%
74 System.Net.Security.dll 4608 5120 11,11%
75 System.Net.ServicePoint.aotdata.arm64 1960 1960 0,00%
76 System.Net.ServicePoint.dll 5632 5632 0,00%
77 System.Numerics.Vectors.aotdata.arm64 816 816 0,00%
78 System.Numerics.Vectors.dll 4608 4608 0,00%
79 System.ObjectModel.aotdata.arm64 10304 11112 7,84%
80 System.ObjectModel.dll 13312 13312 0,00%
81 System.Private.CoreLib.aotdata.arm64 1318848 1777432 34,77%
82 System.Private.CoreLib.dll 912384 934400 2,41%
83 System.Private.Uri.aotdata.arm64 81728 275344 236,90%
84 System.Private.Uri.dll 25600 26624 4,00%
85 System.Private.Xml.aotdata.arm64 229216 376784 64,38%
86 System.Private.Xml.dll 247296 248320 0,41%
87 System.Runtime.InteropServices.aotdata.arm64 840 840 0,00%
88 System.Runtime.InteropServices.dll 4608 4608 0,00%
89 System.Runtime.aotdata.arm64 808 808 0,00%
90 System.Runtime.dll 11776 11776 0,00%
91 System.Security.Cryptography.aotdata.arm64 43000 180640 320,09%
92 System.Security.Cryptography.dll 5632 5632 0,00%
93 System.Text.RegularExpressions.aotdata.arm64 520208 677736 30,28%
94 System.Text.RegularExpressions.dll 139264 139776 0,37%
95 System.Threading.Thread.aotdata.arm64 816 816 0,00%
96 System.Threading.Thread.dll 4096 4608 12,50%
97 System.Threading.aotdata.arm64 824 824 0,00%
98 System.Threading.dll 4608 4608 0,00%
99 System.Xml.ReaderWriter.aotdata.arm64 816 816 0,00%
100 System.Xml.ReaderWriter.dll 4608 4608 0,00%
101 System.aotdata.arm64 800 800 0,00%
102 System.dll 4096 4096 0,00%
103 _CodeSignature 96 96 0,00%
104 appicon60x60@2x.png 1361 1361 0,00%
105 appicon76x76@2x~ipad.png 1649 1649 0,00%
106 dotnet_bot.png 19036 19036 0,00%
107 dotnet_bot@2x.png 41155 41155 0,00%
108 dotnet_bot@3x.png 55868 55868 0,00%
109 icudt.dat 1824544 1859040 1,89%
110 runtimeconfig.bin 983 983 0,00%
111 splash.png 1554 1554 0,00%
112 splash@2x.png 2750 2750 0,00%
113 splash@3x.png 4776 4776 0,00%
TOTAL: 40598192 72477624 78,52%

Observation

Biggest differences can be seen in the app binary MyMauiApp (row 33) and .aotdata.arm64 files.

/cc: @SamMonoRT @kotlarmilos @rolfbjarne @jonathanpeppers @vargaz @stephentoub

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