GeezerVison

Signed-off-by: James M Snell <[email protected]>
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Use a uv_check_t on BindingData to process outbound
pending packet send, and use TrySend for actually sending
packets when possible. Results in an 8% improvement in
req/s and ~24% improvement in p95 latency.

Also sets us up better for future improvements in
libuv if the changes proposed in libuv/libuv#5116
are accepted.

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Improves overall performance and sets us up for eventual
support for GRO/GSO batching in libuv in the future.

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Set up for when libuv eventually supports ECN marking.
Pass the ECN marking stuff into ngtcp2.

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Every stream, session, and endpoint creates aliased
structs for stats and state. These were creating
v8::ArrayBuffer allocations and views for each instance,
which is expensive. This adds a new arena mechanism
for AliasedStructs that allocates in pages and allows
Streams and Sessions to share the same underlying
ArrayBuffer for their stats and state. Since these
are never exposed to users, this is safe and results
in a significant reduction in allocation counts.

Each arena maintains a freelist of pages, where each
page is a max of 16KB bytes. Pages are lazily allocated
and freed as needed. Each slot in the arena corresponds
to a single struct instance, and the slot index is
used to calculate the byte offset within the page for
that struct's view.

The perf improvement is modest but measurable. The
key benefit is in reduced memory fragmentation and GC
overhead.

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

* Adds invalid this protections in the stats classes
* Collects internal private fields into a single private symbol
  to reduce the number of private field accesses
* Adds and corrects isQuic* class checks
* Preserve stream id and direction after destroy
* Improve stats close snapshotting
* Fixes a handful of other bugs and doc issues

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>

Signed-off-by: James M Snell <[email protected]>
Assisted-by: Opencode:Opus 4.6
PR-URL: #63267
Reviewed-By: Matteo Collina <[email protected]>