Reduce unnecessary allocations in TLS handshake (windows)

[davidfowl]

Description

I'm beginning to look at the performance of establishing connections on ASP.NET Core and doing some CPU and allocation profiles. I'm storing my findings as I learn more about the current performance characteristics.

Configuration

• This was running on windows 11 x64

Regression?

No

Data

I tried pasting markdown but it kept flubbing the formatting.

Analysis

It seems like there are a lot of small byte[] allocations and copies that in some cases could be removed.

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Issue Details

---

Description

I'm beginning to look at the performance of establishing connections on ASP.NET Core and doing some CPU and allocation profiles. I'm storing my findings as I learn more about the current performance characteristics.

Configuration

• This was running on windows 11 x64

Regression?

No

Data

I tried pasting markdown but it kept flubbing the formatting.

Analysis

It seems like there are a lot of small byte[] allocations and copies that in some cases could be removed.

Author:	davidfowl
Assignees:	-
Labels:	area-Meta, tenet-performance
Milestone:	-

Tagging subscribers to this area: @dotnet/ncl, @vcsjones
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

I'm beginning to look at the performance of establishing connections on ASP.NET Core and doing some CPU and allocation profiles. I'm storing my findings as I learn more about the current performance characteristics.

Configuration

• This was running on windows 11 x64

Regression?

No

Data

I tried pasting markdown but it kept flubbing the formatting.

Analysis

It seems like there are a lot of small byte[] allocations and copies that in some cases could be removed.

Author:	davidfowl
Assignees:	-
Labels:	area-Meta, area-System.Net.Security, tenet-performance, untriaged
Milestone:	-

[wfurt]

Some of it will be addressed by #68678 @davidfowl.
ProtocolToken is on my list. We can turn it into struct, abandon completely or pool.
I'm not sure if there is good way for the ALPN with current API.

[davidfowl]

Music to my ears @wfurt! I want to do the same for *nix.