QUIC gains multi-ALPN, SNI context management, and token fixes (
6724cc6, 90e12f2, 79671cf, b5c4277)
Node’s QUIC stack now supports multiple server-side ALPN choices, per-identity TLS context updates via endpoint.setSNIContexts(), and better token/early-data handling. The changes also add a new rapidhash-based hashing path to improve QUIC-related hashing performance and tighten session behavior around zero-expiration tokens.
v8 adds a synchronous heap profile API (
f8b79a1)
A new v8.startHeapProfile() API lands alongside SyncHeapProfileHandle, enabling synchronous heap profiling with optional GC and sampling controls. This expands the public diagnostics surface for both node:v8 and worker threads.
crypto accepts key data in diffieHellman() and fixes overflow/32-bit edge cases (
1b5dc9b, 41afe9b, 
9ec4a61, e6ef477)
crypto.diffieHellman() now accepts key material in more forms than KeyObject alone, and the docs/errors were aligned to reflect the broader inputs. Separately, crypto got a 32-bit KangarooTwelve overflow guard and secure-context memory tracking, plus some API message cleanup around key argument names.
String encoding gets cheaper for small outputs (
70c1d6b)
StringBytes::Encode() now uses stack-backed buffers for small encodings instead of heap allocations. This should reduce overhead on common short-string paths like hex, base64, and UTF-8 conversions.
Assert/util deep equality fixes stale nested cycle state (
8db9d43)
Deep comparison now clears temporary nested cycle entries after successful comparisons, preventing later sibling comparisons from incorrectly failing. This fixes a subtle deepStrictEqual correctness bug for some equivalent nested structures.
Other misc changes
- Updated perfetto to 54.0 and added updater/build wiring (2 commits)
fs.stat()now accepts asignaloption- Misc QUIC, crypto, stream, and internal refactors/test updates