Skip to content

What's new HTTP/2 perf #27307

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Rick-Anderson merged 1 commit into from
Oct 18, 2022
Merged

What's new HTTP/2 perf #27307

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 3 additions & 1 deletion aspnetcore/release-notes/aspnetcore-7.0.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -453,7 +453,9 @@ Previously, the HTTP/2 multiplexing implementation relied on a [lock](/dotnet/cs

One place where these improvements can be noticed is in gRPC, a popular RPC framework that uses HTTP/2. Kestrel + gRPC benchmarks show a dramatic improvement:

![Entity diagram](https://user-images.githubusercontent.com/219224/177910504-e93579b4-02e4-4079-8a8c-d9d24857aabf.png)
![gRPC server streaming performance](https://user-images.githubusercontent.com/219224/177910504-e93579b4-02e4-4079-8a8c-d9d24857aabf.png)

Changes were made in the HTTP/2 frame writing code that improves performance when there are multiple streams trying to write data on a single HTTP/2 connection. We now dispatch TLS work to the thread pool and more quickly release a write lock that other streams can acquire to write their data. The reduction in wait times can yield significant performance improvements in cases where there is contention for this write lock. A gRPC benchmark with 70 streams on a single connection (with TLS) showed a ~15% improvement in requests per second (RPS) with this change.

### Kestrel performance improvements on high core machines

Expand Down