Benchmarks for #121479 (EgorBo)

[EgorBot]

Processing dotnet/runtime#121479 (comment) command:

Command

-amd -intel -arm

using System;
using System.Collections.Generic;
using System.Globalization;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Running;

BenchmarkSwitcher.FromAssembly(typeof(DateTimeParsingBenchmarks).Assembly).Run(args);

public class DateTimeParsingBenchmarks
{
    public static IEnumerable<object[]> TestData()
    {
        yield return ["2025-11-10", "yyyy-MM-dd", CultureInfo.InvariantCulture, DateTimeStyles.None];
        yield return ["10/11/2025 14:37:05", "dd/MM/yyyy HH:mm:ss", new CultureInfo("en-GB"), DateTimeStyles.None];
        yield return ["11/10/2025 2:37:05 PM", "M/d/yyyy h:mm:ss tt", new CultureInfo("en-US"), DateTimeStyles.AssumeLocal];
        yield return ["Mon, 10 Nov 2025 14:37:05 GMT", "ddd, dd MMM yyyy HH':'mm':'ss 'GMT'", CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal];
        yield return ["2025-11-10T14:37:05+01:00", "yyyy'-'MM'-'dd'T'HH':'mm':'ssK", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind];
    }

    [Benchmark]
    [ArgumentsSource(nameof(TestData))]
    public DateTime TryParseExact_WithCases(string text, string format, CultureInfo culture, DateTimeStyles styles)
        => DateTime.TryParseExact(text, format, culture, styles, out var dt) ? dt : default;
}

(EgorBot will reply in this issue)

[EgorBot]

Benchmark results on linux_azure_genoa

BenchmarkDotNet v0.15.0, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 9V74, 1 CPU, 16 logical and 8 physical cores
  Job-WUNAWT : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
  Job-QMNNUB : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI

Method	Toolchain	text	format	culture	styles	Mean	Error	Ratio
TryParseExact_WithCases	Main	10/11/2025 14:37:05	dd/MM/yyyy HH:mm:ss	en-GB	None	149.5 ns	0.46 ns	1.00
TryParseExact_WithCases	PR	10/11/2025 14:37:05	dd/MM/yyyy HH:mm:ss	en-GB	None	146.5 ns	0.06 ns	0.98
TryParseExact_WithCases	Main	11/10(...)05 PM [21]	M/d/yyyy h:mm:ss tt	en-US	AssumeLocal	259.3 ns	0.21 ns	1.00
TryParseExact_WithCases	PR	11/10(...)05 PM [21]	M/d/yyyy h:mm:ss tt	en-US	AssumeLocal	255.8 ns	0.14 ns	0.99
TryParseExact_WithCases	Main	2025-11-10	yyyy-MM-dd	****	None	126.2 ns	0.04 ns	1.00
TryParseExact_WithCases	PR	2025-11-10	yyyy-MM-dd		None	127.3 ns	0.06 ns	1.01
TryParseExact_WithCases	Main	2025-(...)01:00 [25]	yyyy'(...):'ssK [30]	****	RoundtripKind	173.4 ns	0.99 ns	1.00
TryParseExact_WithCases	PR	2025-(...)01:00 [25]	yyyy'(...):'ssK [30]		RoundtripKind	170.6 ns	0.07 ns	0.98
TryParseExact_WithCases	Main	Mon, (...)5 GMT [29]	ddd, (...)'GMT' [35]	****	Adjus(...)ersal [34]	358.2 ns	0.18 ns	1.00
TryParseExact_WithCases	PR	Mon, (...)5 GMT [29]	ddd, (...)'GMT' [35]		Adjus(...)ersal [34]	358.7 ns	0.18 ns	1.00

Artifacts.zip

cc @EgorBo (agent_logs.txt). EgorBot manual: link.

[EgorBot]

Benchmark results on linux_azure_cobalt100

BenchmarkDotNet v0.15.0, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
Neoverse-N2, 16 physical cores
  Job-YXZLJU : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD
  Job-AXLUWS : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD

Method	Toolchain	text	format	culture	styles	Mean	Error	Ratio
TryParseExact_WithCases	Main	10/11/2025 14:37:05	dd/MM/yyyy HH:mm:ss	en-GB	None	195.8 ns	0.09 ns	1.00
TryParseExact_WithCases	PR	10/11/2025 14:37:05	dd/MM/yyyy HH:mm:ss	en-GB	None	197.5 ns	0.09 ns	1.01
TryParseExact_WithCases	Main	11/10(...)05 PM [21]	M/d/yyyy h:mm:ss tt	en-US	AssumeLocal	357.2 ns	0.10 ns	1.00
TryParseExact_WithCases	PR	11/10(...)05 PM [21]	M/d/yyyy h:mm:ss tt	en-US	AssumeLocal	361.6 ns	0.09 ns	1.01
TryParseExact_WithCases	Main	2025-11-10	yyyy-MM-dd	****	None	163.4 ns	0.06 ns	1.00
TryParseExact_WithCases	PR	2025-11-10	yyyy-MM-dd		None	164.2 ns	0.05 ns	1.00
TryParseExact_WithCases	Main	2025-(...)01:00 [25]	yyyy'(...):'ssK [30]	****	RoundtripKind	207.5 ns	0.66 ns	1.00
TryParseExact_WithCases	PR	2025-(...)01:00 [25]	yyyy'(...):'ssK [30]		RoundtripKind	215.5 ns	0.16 ns	1.04
TryParseExact_WithCases	Main	Mon, (...)5 GMT [29]	ddd, (...)'GMT' [35]	****	Adjus(...)ersal [34]	493.3 ns	2.92 ns	1.00
TryParseExact_WithCases	PR	Mon, (...)5 GMT [29]	ddd, (...)'GMT' [35]		Adjus(...)ersal [34]	490.3 ns	0.27 ns	0.99

Artifacts.zip

cc @EgorBo (agent_logs.txt). EgorBot manual: link.

[EgorBot]

Benchmark results on linux_azure_cascadelake

BenchmarkDotNet v0.15.0, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
Intel Xeon Platinum 8370C CPU 2.80GHz, 1 CPU, 16 logical and 8 physical cores
  Job-PNWCVM : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
  Job-BCKGRA : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI

Method	Toolchain	text	format	culture	styles	Mean	Error	Ratio
TryParseExact_WithCases	Main	10/11/2025 14:37:05	dd/MM/yyyy HH:mm:ss	en-GB	None	175.5 ns	0.06 ns	1.00
TryParseExact_WithCases	PR	10/11/2025 14:37:05	dd/MM/yyyy HH:mm:ss	en-GB	None	173.1 ns	0.05 ns	0.99
TryParseExact_WithCases	Main	11/10(...)05 PM [21]	M/d/yyyy h:mm:ss tt	en-US	AssumeLocal	324.2 ns	0.33 ns	1.00
TryParseExact_WithCases	PR	11/10(...)05 PM [21]	M/d/yyyy h:mm:ss tt	en-US	AssumeLocal	324.5 ns	0.35 ns	1.00
TryParseExact_WithCases	Main	2025-11-10	yyyy-MM-dd	****	None	148.8 ns	0.11 ns	1.00
TryParseExact_WithCases	PR	2025-11-10	yyyy-MM-dd		None	148.1 ns	0.06 ns	1.00
TryParseExact_WithCases	Main	2025-(...)01:00 [25]	yyyy'(...):'ssK [30]	****	RoundtripKind	195.2 ns	0.07 ns	1.00
TryParseExact_WithCases	PR	2025-(...)01:00 [25]	yyyy'(...):'ssK [30]		RoundtripKind	197.4 ns	0.05 ns	1.01
TryParseExact_WithCases	Main	Mon, (...)5 GMT [29]	ddd, (...)'GMT' [35]	****	Adjus(...)ersal [34]	442.3 ns	0.19 ns	1.00
TryParseExact_WithCases	PR	Mon, (...)5 GMT [29]	ddd, (...)'GMT' [35]		Adjus(...)ersal [34]	442.9 ns	0.15 ns	1.00

Artifacts.zip

cc @EgorBo (agent_logs.txt). EgorBot manual: link.

[EgorBo]

@EgorBot -amd -arm -profiler

using BenchmarkDotNet.Attributes;

public class UnescapeDataStringBenchmark
{
    [Benchmark]
    public DateTime ParseR() => DateTime.ParseExact("Mon, 03 Jun 1996 22:15:00 GMT", "r", null);
}

[EgorBot]

Benchmark results on linux_aws_graviton4

BenchmarkDotNet v0.15.0, Linux Ubuntu 24.04 LTS (Noble Numbat)
Neoverse-V2, 16 physical cores
  Job-EQNLGQ : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD
  Job-DDOTMB : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD

Method	Toolchain	Mean	Error	Ratio
ParseR	Main	18.05 ns	0.004 ns	1.00
ParseR	PR	18.13 ns	0.001 ns	1.00

Artifacts.zip

Perf profile for UnescapeDataStringBenchmark_ParseR:

Speedscope: Main vs PR 🔥
Svg: Main vs PR
Hot asm: Main vs PR
HW counters: Main vs PR

cc @EgorBo (agent_logs.txt). EgorBot manual: link.

[EgorBot]

Benchmark results on linux_aws_genoa

BenchmarkDotNet v0.15.0, Linux Ubuntu 24.04 LTS (Noble Numbat)
AMD EPYC 9R14, 1 CPU, 16 logical and 16 physical cores
  Job-KYKRES : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
  Job-TRNXPM : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI

Method	Toolchain	Mean	Error	Ratio
ParseR	Main	17.19 ns	0.011 ns	1.00
ParseR	PR	17.17 ns	0.003 ns	1.00

Artifacts.zip

Perf profile for UnescapeDataStringBenchmark_ParseR:

Speedscope: Main vs PR 🔥
Svg: Main vs PR
Hot asm: Main vs PR
HW counters: Main vs PR

cc @EgorBo (agent_logs.txt). EgorBot manual: link.