MAUI iOS sample app size regression compared to .NET7

[ivanpovazan]

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:

• [mono][perf] iOS and WASM disk size regressions on 06 Dec 2022 #79285
• [mono][perf] iOS disk size regression on 11 Nov 2022 #78851

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

• [mono][aot] Prefer concrete instances instead of gshared ones for met… #78182
• Rewrite Enum and add {ISpanFormattable}.TryFormat #78580

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>

2. Build dotnet/runtime for iOS:

cd <some_repo_dir>
./build.sh mono+libs -c Release -os iOS -arch arm64

3. Download and install dotnet 7.0.100 from https://dotnet.microsoft.com/en-us/download/dotnet/7.0
4. Make sure 7.0.100 is the one on the path

cd ~/
dotnet --version
7.0.100

5. Install maui workload

sudo dotnet workload install maui --source https://api.nuget.org/v3/index.json

6. Create a sample MAUI app

dotnet new maui -n "MyMauiApp"
cd MyMauiApp

7. 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>

8. 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

9. 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

10. 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

11. 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

Tagging subscribers to 'size-reduction': @eerhardt, @SamMonoRT, @marek-safar
See info in area-owners.md if you want to be subscribed.

Issue Details

---

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:

• [mono][perf] iOS and WASM disk size regressions on 06 Dec 2022 #79285
• [mono][perf] iOS disk size regression on 11 Nov 2022 #78851

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

• [mono][aot] Prefer concrete instances instead of gshared ones for met… #78182
• Rewrite Enum and add {ISpanFormattable}.TryFormat #78580

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>

2. Build dotnet/runtime for iOS:

cd <some_repo_dir>
./build.sh mono+libs -c Release -os iOS -arch arm64

3. Download and install dotnet 7.0.100 from https://dotnet.microsoft.com/en-us/download/dotnet/7.0
4. Make sure 7.0.100 is the one on the path

cd ~/
dotnet --version
7.0.100

5. Install maui workload

sudo dotnet workload install maui --source https://api.nuget.org/v3/index.json

6. Create a sample MAUI app

dotnet new maui -n "MyMauiApp"
cd MyMauiApp

7. 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>

8. 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

9. 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

10. 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

11. 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

Author:	ivanpovazan
Assignees:	-
Labels:	area-Codegen-AOT-mono, size-reduction
Milestone:	Future

[vargaz]

A size increase this large might be caused by generating/not stripping debug info etc.

[vargaz]

Some observations:

• the corlib .o file is 18mb vs 8mb previously.
• about 3b of that seems to be Vector methods/shared methods/instances
• the linked corlib is still 1.6mb and contains 13k methods

As discussed elsewhere, adding a linker conditional to the Vector fallback methods which links them out if the platform supports SIMD would probably help a lot.

[ivanpovazan]

Here is another comparison table with the data just before the enums change i.e. its parent commit: 6e0c046 and with the change included 62f3eb2.
It can be seen that regression progressed: 32,74% -> 63,68% -> 78,52% reaching the current state.

Unfortunately I have troubles building the sample app with the earlier changes regarding generics 486682a but will update the issue if I managed to get around the compilation failures, to see how much this change affected the first regression point of 32,74%

Size on disk comparison (in bytes)

#	File name	Size net7 release	Size with 6e0c046	Diff-to-net7	Size with 62f3eb2	Diff-to-net7	Size current main	Diff-to-net7
1	AboutAssets.txt	656	656	0,00%	656	0,00%	656	0,00%
2	Assets.car	50424	50424	0,00%	50424	0,00%	50424	0,00%
3	Info.plist	1424	1424	0,00%	1424	0,00%	1424	0,00%
4	MauiSplash.storyboardc	160	160	0,00%	160	0,00%	160	0,00%
5	Microsoft.Extensions.Configuration.Abstractions.aotdata.arm64	920	920	0,00%	920	0,00%	920	0,00%
6	Microsoft.Extensions.Configuration.Abstractions.dll	5632	5632	0,00%	5632	0,00%	5632	0,00%
7	Microsoft.Extensions.Configuration.aotdata.arm64	53928	90344	67,53%	149368	176,98%	179512	232,87%
8	Microsoft.Extensions.Configuration.dll	9728	9728	0,00%	9728	0,00%	9728	0,00%
9	Microsoft.Extensions.DependencyInjection.Abstractions.aotdata.arm64	7448	7496	0,64%	148984	1900,32%	178512	2296,78%
10	Microsoft.Extensions.DependencyInjection.Abstractions.dll	13312	13312	0,00%	13312	0,00%	13312	0,00%
11	Microsoft.Extensions.DependencyInjection.aotdata.arm64	123976	193400	56,00%	243296	96,24%	253960	104,85%
12	Microsoft.Extensions.DependencyInjection.dll	25600	25600	0,00%	25600	0,00%	25600	0,00%
13	Microsoft.Extensions.Logging.Abstractions.aotdata.arm64	44640	72160	61,65%	153408	243,66%	184584	313,49%
14	Microsoft.Extensions.Logging.Abstractions.dll	12800	12800	0,00%	12800	0,00%	12800	0,00%
15	Microsoft.Extensions.Logging.aotdata.arm64	60832	97304	59,96%	158464	160,49%	188192	209,36%
16	Microsoft.Extensions.Logging.dll	13312	13312	0,00%	13312	0,00%	13312	0,00%
17	Microsoft.Extensions.Options.aotdata.arm64	10840	10832	-0,07%	10832	-0,07%	10832	-0,07%
18	Microsoft.Extensions.Options.dll	12288	12288	0,00%	12288	0,00%	12288	0,00%
19	Microsoft.Extensions.Primitives.aotdata.arm64	3936	3920	-0,41%	3920	-0,41%	3920	-0,41%
20	Microsoft.Extensions.Primitives.dll	7168	7168	0,00%	7168	0,00%	7168	0,00%
21	Microsoft.Maui.Controls.Xaml.aotdata.arm64	97120	130176	34,04%	192776	98,49%	243424	150,64%
22	Microsoft.Maui.Controls.Xaml.dll	74240	74240	0,00%	74240	0,00%	74240	0,00%
23	Microsoft.Maui.Controls.aotdata.arm64	914264	943536	3,20%	1020440	11,61%	1056064	15,51%
24	Microsoft.Maui.Controls.dll	1038336	1038336	0,00%	1038336	0,00%	1038336	0,00%
25	Microsoft.Maui.Essentials.aotdata.arm64	62792	87352	39,11%	166848	165,72%	197168	214,00%
26	Microsoft.Maui.Essentials.dll	30720	30720	0,00%	30720	0,00%	30720	0,00%
27	Microsoft.Maui.Graphics.aotdata.arm64	142944	181296	26,83%	269400	88,47%	308936	116,12%
28	Microsoft.Maui.Graphics.dll	114688	114688	0,00%	114688	0,00%	114688	0,00%
29	Microsoft.Maui.aotdata.arm64	384816	452776	17,66%	525880	36,66%	534872	38,99%
30	Microsoft.Maui.dll	386048	386048	0,00%	386048	0,00%	386048	0,00%
31	Microsoft.iOS.aotdata.arm64	325264	353152	8,57%	429296	31,98%	461264	41,81%
32	Microsoft.iOS.dll	497664	497664	0,00%	497664	0,00%	497664	0,00%
33	MyMauiApp	29000688	41014544	41,43%	51805456	78,64%	56731120	95,62%
34	MyMauiApp.aotdata.arm64	9464	9544	0,85%	151944	1505,49%	181840	1821,39%
35	MyMauiApp.dll	18432	18432	0,00%	18432	0,00%	18432	0,00%
36	OpenSans-Regular.ttf	107184	107184	0,00%	107184	0,00%	107184	0,00%
37	OpenSans-Semibold.ttf	111068	111068	0,00%	111068	0,00%	111068	0,00%
38	PkgInfo	8	8	0,00%	8	0,00%	8	0,00%
39	System.Collections.Concurrent.aotdata.arm64	74544	125256	68,03%	213176	185,97%	207520	178,39%
40	System.Collections.Concurrent.dll	13312	13312	0,00%	13312	0,00%	13312	0,00%
41	System.Collections.NonGeneric.aotdata.arm64	1312	1312	0,00%	1312	0,00%	1312	0,00%
42	System.Collections.NonGeneric.dll	7168	7168	0,00%	7168	0,00%	7168	0,00%
43	System.Collections.Specialized.aotdata.arm64	1392	1392	0,00%	1392	0,00%	1584	13,79%
44	System.Collections.Specialized.dll	8192	8192	0,00%	8192	0,00%	8192	0,00%
45	System.Collections.aotdata.arm64	6952	6952	0,00%	6952	0,00%	7208	3,68%
46	System.Collections.dll	8192	8192	0,00%	8192	0,00%	8192	0,00%
47	System.ComponentModel.Primitives.aotdata.arm64	2096	2096	0,00%	2096	0,00%	178344	8408,78%
48	System.ComponentModel.Primitives.dll	9216	9216	0,00%	9216	0,00%	9216	0,00%
49	System.ComponentModel.TypeConverter.aotdata.arm64	16544	16544	0,00%	16544	0,00%	192896	1065,96%
50	System.ComponentModel.TypeConverter.dll	49664	49664	0,00%	49664	0,00%	49664	0,00%
51	System.ComponentModel.aotdata.arm64	856	856	0,00%	856	0,00%	856	0,00%
52	System.ComponentModel.dll	4608	4608	0,00%	4608	0,00%	4608	0,00%
53	System.Console.aotdata.arm64	46432	73920	59,20%	152792	229,07%	195856	321,81%
54	System.Console.dll	8704	8704	0,00%	8704	0,00%	8704	0,00%
55	System.Diagnostics.TraceSource.aotdata.arm64	2416	2416	0,00%	2416	0,00%	2416	0,00%
56	System.Diagnostics.TraceSource.dll	8704	8704	0,00%	8704	0,00%	8704	0,00%
57	System.Drawing.Primitives.aotdata.arm64	4856	4928	1,48%	146400	2914,83%	175960	3523,56%
58	System.Drawing.Primitives.dll	7168	7168	0,00%	7168	0,00%	7168	0,00%
59	System.Drawing.aotdata.arm64	808	808	0,00%	808	0,00%	808	0,00%
60	System.Drawing.dll	4608	4608	0,00%	4608	0,00%	4608	0,00%
61	System.Linq.Expressions.aotdata.arm64	499248	528056	5,77%	579376	16,05%	610776	22,34%
62	System.Linq.Expressions.dll	120320	120320	0,00%	120320	0,00%	120320	0,00%
63	System.Linq.aotdata.arm64	121560	150256	23,61%	226616	86,42%	275264	126,44%
64	System.Linq.dll	22528	22016	-2,27%	22016	-2,27%	22016	-2,27%
65	System.Memory.aotdata.arm64	824	824	0,00%	824	0,00%	824	0,00%
66	System.Memory.dll	4608	4096	-11,11%	4096	-11,11%	4096	-11,11%
67	System.Net.Http.aotdata.arm64	130696	226808	73,54%	278432	113,04%	311760	138,54%
68	System.Net.Http.dll	61440	61952	0,83%	61952	0,83%	61952	0,83%
69	System.Net.Primitives.aotdata.arm64	1424	1424	0,00%	1432	0,56%	1432	0,56%
70	System.Net.Primitives.dll	8704	8704	0,00%	8704	0,00%	8704	0,00%
71	System.Net.Requests.aotdata.arm64	928	928	0,00%	928	0,00%	928	0,00%
72	System.Net.Requests.dll	5632	5632	0,00%	5632	0,00%	5632	0,00%
73	System.Net.Security.aotdata.arm64	888	888	0,00%	888	0,00%	888	0,00%
74	System.Net.Security.dll	4608	5120	11,11%	5120	11,11%	5120	11,11%
75	System.Net.ServicePoint.aotdata.arm64	1960	1960	0,00%	1960	0,00%	1960	0,00%
76	System.Net.ServicePoint.dll	5632	5632	0,00%	5632	0,00%	5632	0,00%
77	System.Numerics.Vectors.aotdata.arm64	816	816	0,00%	816	0,00%	816	0,00%
78	System.Numerics.Vectors.dll	4608	4608	0,00%	4608	0,00%	4608	0,00%
79	System.ObjectModel.aotdata.arm64	10304	10720	4,04%	10720	4,04%	11112	7,84%
80	System.ObjectModel.dll	13312	13312	0,00%	13312	0,00%	13312	0,00%
81	System.Private.CoreLib.aotdata.arm64	1318848	1621832	22,97%	1694456	28,48%	1777432	34,77%
82	System.Private.CoreLib.dll	912384	932864	2,24%	935936	2,58%	934400	2,41%
83	System.Private.Uri.aotdata.arm64	81728	217696	166,37%	264696	223,87%	275344	236,90%
84	System.Private.Uri.dll	25600	26624	4,00%	26624	4,00%	26624	4,00%
85	System.Private.Xml.aotdata.arm64	229216	274304	19,67%	321376	40,21%	376784	64,38%
86	System.Private.Xml.dll	247296	248320	0,41%	248320	0,41%	248320	0,41%
87	System.Runtime.InteropServices.aotdata.arm64	840	840	0,00%	840	0,00%	840	0,00%
88	System.Runtime.InteropServices.dll	4608	4608	0,00%	4608	0,00%	4608	0,00%
89	System.Runtime.aotdata.arm64	808	808	0,00%	808	0,00%	808	0,00%
90	System.Runtime.dll	11776	11776	0,00%	11776	0,00%	11776	0,00%
91	System.Security.Cryptography.aotdata.arm64	43000	70408	63,74%	150304	249,54%	180640	320,09%
92	System.Security.Cryptography.dll	5632	5632	0,00%	5632	0,00%	5632	0,00%
93	System.Text.RegularExpressions.aotdata.arm64	520208	605448	16,39%	648656	24,69%	677736	30,28%
94	System.Text.RegularExpressions.dll	139264	139776	0,37%	139776	0,37%	139776	0,37%
95	System.Threading.Thread.aotdata.arm64	816	816	0,00%	816	0,00%	816	0,00%
96	System.Threading.Thread.dll	4096	4608	12,50%	4608	12,50%	4608	12,50%
97	System.Threading.aotdata.arm64	824	824	0,00%	824	0,00%	824	0,00%
98	System.Threading.dll	4608	4608	0,00%	4608	0,00%	4608	0,00%
99	System.Xml.ReaderWriter.aotdata.arm64	816	816	0,00%	816	0,00%	816	0,00%
100	System.Xml.ReaderWriter.dll	4608	4608	0,00%	4608	0,00%	4608	0,00%
101	System.aotdata.arm64	800	800	0,00%	800	0,00%	800	0,00%
102	System.dll	4096	4096	0,00%	4096	0,00%	4096	0,00%
103	_CodeSignature	96	96	0,00%	96	0,00%	96	0,00%
104	appicon60x60@2x.png	1361	1361	0,00%	1361	0,00%	1361	0,00%
105	appicon76x76@2x~ipad.png	1649	1649	0,00%	1649	0,00%	1649	0,00%
106	dotnet_bot.png	19036	19036	0,00%	19036	0,00%	19036	0,00%
107	dotnet_bot@2x.png	41155	41155	0,00%	41155	0,00%	41155	0,00%
108	dotnet_bot@3x.png	55868	55868	0,00%	55868	0,00%	55868	0,00%
109	icudt.dat	1824544	1859040	1,89%	1859040	1,89%	1859040	1,89%
110	runtimeconfig.bin	983	983	0,00%	983	0,00%	983	0,00%
111	splash.png	1554	1554	0,00%	1554	0,00%	1554	0,00%
112	splash@2x.png	2750	2750	0,00%	2750	0,00%	2750	0,00%
113	splash@3x.png	4776	4776	0,00%	4776	0,00%	4776	0,00%
	TOTAL:	40598192	53890112	32,74%	66453040	63,68%	72477624	78,52%

[SamMonoRT]

some of these are mitigated by the de-dup feature and other fixes. Moving this to 9.0.0

[SamMonoRT]

@kotlarmilos once we have the updated numbers from automation, add them here.