Benchmarks for dotnet/runtime#129022 (for @AndyAyersMS)

[EgorBot]

Processing benchmark request from PR dotnet/runtime#129022.

Targets: ubuntu24_azure_ampere, ubuntu24_azure_cobalt100
Commits: main;PR_129022

• ubuntu24_azure_ampere: live logs
• ubuntu24_azure_cobalt100: live logs

Results will be posted here once they are ready.

[EgorBot]

Results for ubuntu24_azure_cobalt100

@AndyAyersMS

BenchmarkDotNet v0.16.0-nightly.20260518.1249, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
Neoverse-N2, 8 physical cores
Memory: 31.27 GB Total, 4.38 GB Available
.NET SDK 11.0.100-preview.6.26305.101
  [Host]     : .NET 10.0.8 (10.0.8, 10.0.826.23019), Arm64 RyuJIT armv8.0-a

EvaluateOverhead=False  PowerPlanMode=  IterationTime=250ms  
MaxIterationCount=20  MinIterationCount=15  WarmupCount=1  

Method	Toolchain	Size	Mean	Error	Ratio	Allocated	Alloc Ratio
ImmutableList	main	512	255.9 μs	1.16 μs	1.05	-	NA
ImmutableList	PR #129022	512	244.7 μs	0.33 μs	1.00	-	NA

---

BenchmarkDotNet v0.16.0-nightly.20260518.1249, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
Neoverse-N2, 8 physical cores
Memory: 31.27 GB Total, 4.38 GB Available
.NET SDK 11.0.100-preview.6.26305.101
  [Host]     : .NET 10.0.8 (10.0.8, 10.0.826.23019), Arm64 RyuJIT armv8.0-a

EvaluateOverhead=False  PowerPlanMode=  IterationTime=250ms  
MaxIterationCount=20  MinIterationCount=15  WarmupCount=1  

Method	Toolchain	Size	Mean	Error	Ratio	Allocated	Alloc Ratio
ImmutableList	main	512	540.4 μs	0.46 μs	1.02	-	NA
ImmutableList	PR #129022	512	532.1 μs	0.52 μs	1.00	-	NA

Full logs

[EgorBot]

Results for ubuntu24_azure_ampere

@AndyAyersMS

BenchmarkDotNet v0.16.0-nightly.20260518.1249, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
Neoverse-N1, 8 physical cores
Memory: 31.27 GB Total, 4.4 GB Available
.NET SDK 11.0.100-preview.6.26305.101
  [Host]     : .NET 10.0.8 (10.0.8, 10.0.826.23019), Arm64 RyuJIT armv8.0-a

EvaluateOverhead=False  PowerPlanMode=  IterationTime=250ms  
MaxIterationCount=20  MinIterationCount=15  WarmupCount=1  

Method	Toolchain	Size	Mean	Error	Ratio	Allocated	Alloc Ratio
ImmutableList	main	512	449.9 μs	0.07 μs	1.19	-	NA
ImmutableList	PR #129022	512	378.5 μs	0.06 μs	1.00	-	NA

---

BenchmarkDotNet v0.16.0-nightly.20260518.1249, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
Neoverse-N1, 8 physical cores
Memory: 31.27 GB Total, 4.4 GB Available
.NET SDK 11.0.100-preview.6.26305.101
  [Host]     : .NET 10.0.8 (10.0.8, 10.0.826.23019), Arm64 RyuJIT armv8.0-a

EvaluateOverhead=False  PowerPlanMode=  IterationTime=250ms  
MaxIterationCount=20  MinIterationCount=15  WarmupCount=1  

Method	Toolchain	Size	Mean	Error	Ratio	Allocated	Alloc Ratio
ImmutableList	main	512	826.6 μs	0.19 μs	0.98	-	NA
ImmutableList	PR #129022	512	841.2 μs	0.57 μs	1.00	-	NA

Full logs