Perf improvement: antiforgery-validation, kestrel-header-symbols, tls-renegotiation-kestrel

| Scenario | Environment | Date | Old RPS | New RPS | Change | Deviation | StDev | Dependencies |
| -------- | ----------- | ---- | ------- | ------- | ------ | --------- | ----- | ------------ |
| antiforgery-validation | Antiforgery Token Validation 13- Trends cobalt-hosted-lin | 07/24/2026 10:39:31 | 205,942 | 246,416 | 19.65 % (40,474) :thumbsup: | 2.09 σ | 19,326.18 | Changes NameVersionDiff Antiforgery.dll `1.0.0` -> `1.0.0` https://github.com/aspnet/Benchmarks/compare/e5d4b8043adb18be22428e0794b3e69385510fd3...25660cbc6197910908842da07c25c7cde8235ae3 |
| kestrel-header-symbols | Kestrel Linux: Invalid Header 13- Trends cobalt-hosted-lin-azl3 | 07/24/2026 10:45:52 | 3,661 | 4,575 | 0.00 % (914) :thumbsup: | 2.08 σ | 439.62 | Changes NameVersionDiff Kestrel.dll `1.0.0` -> `1.0.0` https://github.com/aspnet/Benchmarks/compare/e5d4b8043adb18be22428e0794b3e69385510fd3...25660cbc6197910908842da07c25c7cde8235ae3 |
| tls-renegotiation-kestrel | Kestrel Linux: TLS Renegotiation 13- Trends cobalt-hosted-lin | 07/24/2026 10:44:27 | 1,889 | 2,423 | 0.00 % (534) :thumbsup: | 2.13 σ | 250.53 | Changes NameVersionDiff Kestrel.dll `1.0.0` -> `1.0.0` https://github.com/aspnet/Benchmarks/compare/e5d4b8043adb18be22428e0794b3e69385510fd3...25660cbc6197910908842da07c25c7cde8235ae3 |

[PowerBI Dashboard](https://aka.ms/aspnet/benchmarks)

@sebastienros

Start with the three benchmark scenarios in the issue and inspect the linked Benchmarks comparison for the reported changes. The issue names no source files, tests, requested code change, or acceptance criteria, so the intended fix and definition of done cannot be determined from this report alone.

Written by the indexing model from the issue text.