Perf regression: antiforgery-validation, fortunes_dapper

[pr-benchmarks]

Scenario	Environment	Date	Old RPS	New RPS	Change	Deviation	StDev	Dependencies
antiforgery-validation [Fixed]	Antiforgery Token Validation 6- Trends Gold Win	04/08/2026 13:26:35	868,077	843,303	-2.85 % (-24,773) 👎	-2.92 σ	8,473.45	Changes Name Version Diff Microsoft.AspNetCore.Antiforgery.dll 11.0.0-preview.4.26203.108 -> 11.0.0-preview.4.26207.108 dotnet/dotnet@1a405c7...8fe340e Microsoft.AspNetCore.App 11.0.0-preview.4.26203.108 -> 11.0.0-preview.4.26207.108 1a405c7...8fe340e Microsoft.NETCore.App 11.0.0-preview.4.26203.108 -> 11.0.0-preview.4.26207.108 dotnet/runtime@1a405c7...8fe340e
fortunes_dapper	Fortunes Dapper 8- Trends Database Gold Lin	04/08/2026 08:25:56	21,380	19,901	-6.92 % (-1,479) 👎	-3.91 σ	378.07	Changes Name Version Diff Microsoft.AspNetCore.Antiforgery.dll 11.0.0-preview.4.26203.108 -> 11.0.0-preview.4.26207.108 dotnet/dotnet@1a405c7...8fe340e Microsoft.AspNetCore.App 11.0.0-preview.4.26203.108 -> 11.0.0-preview.4.26207.108 1a405c7...8fe340e Microsoft.NETCore.App 11.0.0-preview.4.26203.108 -> 11.0.0-preview.4.26207.108 dotnet/runtime@1a405c7...8fe340e

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@sebastienros

[github-actions]

Triage Summary

Area: area-perf (already labeled) — automated benchmark regression report for antiforgery and database scenarios
Type: performance — automated perf-regression notification showing RPS drops between consecutive preview builds

Regression Info

• Previously working version: 11.0.0-preview.4.26203.108
• Broken since: 11.0.0-preview.4.26207.108
• antiforgery-validation: −2.85% RPS (868,077 → 843,303) on Windows Gold
• fortunes_dapper: −6.92% RPS (21,380 → 19,901) on Linux Gold
• Regression spans changes in Microsoft.AspNetCore.Antiforgery.dll, Microsoft.AspNetCore.App, and Microsoft.NETCore.App between commits 1a405c76db... → 8fe340e65f...

Potential Duplicates

• Perf regression: antiforgery-validation, fortunes, fortunes_ef #65699 - "Perf regression: antiforgery-validation, fortunes, fortunes_ef" (similarity: medium — same antiforgery-validation scenario, different build window and additional scenarios)

Notes

• This is an automated issue filed by pr-benchmarks[bot]. The diff links in the issue body point to the exact commit ranges in dotnet/aspnetcore, dotnet/dotnet, and dotnet/runtime that introduced the change.
• @sebastienros is tagged for follow-up.
• The fortunes_dapper regression may be noise from the runtime/infra change rather than an antiforgery-specific regression; worth investigating the two separately.

Generated by Issue Triage Agent for dotnet/aspnetcore for issue #66253 · ● 377.7K · ◷