.NET 9 per-preview performance overview

[kotlarmilos]

Description

This issue provides an overview of the all performance regressions from microbenchmark automated runs in WASM, Mono AOT, and Interpreter during the timeframe of .NET 9 preview releases. WASM regressions are tracked separately at #96444.

List of queries for autofilling issues:

• Mono AOT autofilling issues: https://github.com/dotnet/perf-autofiling-issues/issues?q=is%3Aissue+is%3Aopen+label%3Amono-aot
• Interpreter autofilling issues: https://github.com/dotnet/perf-autofiling-issues/issues?q=is%3Aopen+is%3Aissue+label%3Amono-interpreter
• WASM autofilling issues: https://github.com/dotnet/perf-autofiling-issues/issues?q=is%3Aopen+is%3Aissue+label%3Aarch-wasm
• WASM AOT autofilling issues: https://github.com/dotnet/perf-autofiling-issues/issues?q=is%3Aopen+is%3Aissue+label%3Awasm-aot
• Mono JIT autofilling issues: https://github.com/dotnet/perf-autofiling-issues/issues?q=is%3Aopen+is%3Aissue+label%3Amono-jit

Mono AOT

Preview 5

Issue	Status	Comment
dotnet/perf-autofiling-issues#35132	Investigation	JSON regressions, tagged author
#102557	Resolving	VectorConvert, Tagged author
#102281	Resolving	CredentialCacheTests, Assigned
dotnet/perf-autofiling-issues#33792	Investigation	UnboundedChannelPerfTests, Tagged author
dotnet/perf-autofiling-issues#33791	Investigation	GetType_Resolvers, Tagged author

Preview 4

Issue	Status	Comment
#102382	Resolving	Authors notified
dotnet/perf-autofiling-issues#33133, dotnet/perf-autofiling-issues#33094	Resolving	Need intrinsifying BitCast API #101495
dotnet/perf-autofiling-issues#32800, dotnet/perf-autofiling-issues#33090, dotnet/perf-autofiling-issues#33089	Resolving	Authors notified #101134
#101124, #101127	Resolving	Authors notified #99982
dotnet/perf-autofiling-issues#32511	Resolved

Preview 3

Issue	Status	Comment
dotnet/perf-autofiling-issues#30856	Investigation	EventSourceLogger.NetScopes_TwoMessages regressions, long range of commits, x64/arm64
dotnet/perf-autofiling-issues#31519	Investigation	Reflection.Invoke regression, nothing suspicious in the range, x64/arm64
#102865	Resolving	Perf_Single/Double.TryParse, affecting CoreCLR as well

Preview 2

Issue	Status
dotnet/perf-autofiling-issues#30456, dotnet/perf-autofiling-issues#30503	Resolved

Preview 1

Issue	Status
#102381	Investigating
dotnet/perf-autofiling-issues#27018, dotnet/perf-autofiling-issues#27047	Resolved (no action)
dotnet/perf-autofiling-issues#25809	Archived (#97988)
dotnet/perf-autofiling-issues#24512	Investigating
dotnet/perf-autofiling-issues#27020	Resolved
dotnet/perf-autofiling-issues#27019	Resolved
dotnet/perf-autofiling-issues#26504	Resolved
dotnet/perf-autofiling-issues#26154	Resolved
dotnet/perf-autofiling-issues#25812	Resolved
dotnet/perf-autofiling-issues#25806	Resolved
dotnet/perf-autofiling-issues#25089	Resolved
dotnet/perf-autofiling-issues#25426	Resolved
dotnet/perf-autofiling-issues#25421	Resolved
dotnet/perf-autofiling-issues#24200	Resolved
dotnet/perf-autofiling-issues#24203	Resolved
dotnet/perf-autofiling-issues#23314	Resolved
dotnet/perf-autofiling-issues#23579	Resolved
dotnet/perf-autofiling-issues#24786	Resolved
dotnet/perf-autofiling-issues#24198	Resolved
dotnet/perf-autofiling-issues#22570	Resolved
dotnet/perf-autofiling-issues#22569	Resolved
dotnet/perf-autofiling-issues#23306	Resolved
dotnet/perf-autofiling-issues#23307	Resolved
dotnet/perf-autofiling-issues#23309	Resolved
dotnet/perf-autofiling-issues#23311	Resolved
dotnet/perf-autofiling-issues#23580	Resolved
dotnet/perf-autofiling-issues#23582	Resolved
dotnet/perf-autofiling-issues#23870	Resolved

Mono Interpreter

Preview 5

Issue	Status
dotnet/perf-autofiling-issues#35112	Investigating
dotnet/perf-autofiling-issues#35186	Investigating

Preview 4

Issue	Status
dotnet/perf-autofiling-issues#33948	Investigating
dotnet/perf-autofiling-issues#32813	Investigating
dotnet/perf-autofiling-issues#32770, dotnet/perf-autofiling-issues#32770, dotnet/perf-autofiling-issues#32772, dotnet/perf-autofiling-issues#32812	Resolving
dotnet/perf-autofiling-issues#34651	Resolving
dotnet/perf-autofiling-issues#34665	Investigation

Preview 3

Issue	Status

Preview 2

Issue	Status
dotnet/perf-autofiling-issues#30463	Resolving
dotnet/perf-autofiling-issues#29872	Resolved
dotnet/perf-autofiling-issues#30464	Resolved

Preview 1

Issue	Status
dotnet/perf-autofiling-issues#29871	Resolving
dotnet/perf-autofiling-issues#29026	Resolving
dotnet/perf-autofiling-issues#27704	Resolving
dotnet/perf-autofiling-issues#27704	Resolving
dotnet/perf-autofiling-issues#23222, dotnet/perf-autofiling-issues#23611, dotnet/perf-autofiling-issues#23635	Resolving
dotnet/perf-autofiling-issues#26185	Resolving
dotnet/perf-autofiling-issues#29868	Resolved
dotnet/perf-autofiling-issues#27348	Resolved
dotnet/perf-autofiling-issues#27350, dotnet/perf-autofiling-issues#27351, dotnet/perf-autofiling-issues#27352	Resolved
dotnet/perf-autofiling-issues#26192	Resolved
dotnet/perf-autofiling-issues#22914, dotnet/perf-autofiling-issues#22938	Resolved
dotnet/perf-autofiling-issues#25465	Resolved
dotnet/perf-autofiling-issues#23877, dotnet/perf-autofiling-issues#23880	Resolved
dotnet/perf-autofiling-issues#22915	Resolved
dotnet/perf-autofiling-issues#25084	Resolved
dotnet/perf-autofiling-issues#24816	Resolved
dotnet/perf-autofiling-issues#24812	Resolved
dotnet/perf-autofiling-issues#23615	Resolved
dotnet/perf-autofiling-issues#23614	Resolved
dotnet/perf-autofiling-issues#22539, dotnet/perf-autofiling-issues#22533	Resolved

Mono Size - iOS

Preview 5

Issue	Status	Comment
dotnet/perf-autofiling-issues#34450	Investigation	Tagged author

Preview 4 (NAOT)

Issue	Status	Comment
dotnet/perf-autofiling-issues#34356	Investigation	Tagged author

Preview 4

Date	Diff	Change	Size increase (bytes)	Size increase (%)	Tracking issue	Status
08 Apr 2024	700d724...8508806	#99982	202000	3.63	#100975	Resolving
19 Apr 2024	a3bf7d4...b067ce0	#101258	290000	1.4	#101488	Resolving

Preview 1

Date	Diff	Change	Size increase (bytes)	Size increase (%)	Tracking issue	Status
03 Oct 2023	88f2547...d2e24fa	#90764	066800	5.01	#93072	Resolving

Mono Startup - iOS

Preview 1

Date	Diff	Change	Slowdown (ms)	Slowdown (%)	Tracking issue	Status
16 Dec 2023	2284495...4dffd80	4dffd80	8.3	18.8	#96449	Resolved (no action)

Mono JIT

Issue	Status
dotnet/perf-autofiling-issues#30027	Investigation
dotnet/perf-autofiling-issues#30432	Investigation
dotnet/perf-autofiling-issues#27682	Resolving
dotnet/perf-autofiling-issues#21551	Investigation
dotnet/perf-autofiling-issues#28984	Investigation