Perf improvement: kestrel-hostheader-mismatch, tls-renegotiation-kestrel, tls-renegotiation-kestrel

| Scenario | Environment | Date | Old RPS | New RPS | Change | Deviation | StDev | Dependencies |
| -------- | ----------- | ---- | ------- | ------- | ------ | --------- | ----- | ------------ |
| kestrel-hostheader-mismatch | Kestrel Linux: Host Header Mismatch 14- Trends cobalt-hosted-lin-azl3-28 | 07/24/2026 21:33:23 | 119,599 | 149,228 | 24.77 % (29,630) :thumbsup: | 4.04 σ | 7,335.11 | 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-azl3 | 07/24/2026 20:55:14 | 1,572 | 1,776 | 0.00 % (204) :thumbsup: | 2.35 σ | 86.71 | 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 20:56:34 | 2,003 | 2,522 | 0.00 % (519) :thumbsup: | 2.22 σ | 233.27 | 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

The report names Kestrel scenarios, Kestrel.dll, a Benchmarks comparison, and a PowerBI dashboard, but no source file, test, or entry point. Start by reviewing the benchmark comparison and dashboard to determine whether a code change is intended. The issue does not define completion criteria beyond the reported performance results.

Written by the indexing model from the issue text.