Node fs.cp gets a native fast path (
fd8bf48)
Deno now routes default-equivalent async node:fs.cp / fs.promises.cp calls through a Rust op instead of the JS walker. That should materially cut copy overhead for the common no-filter path while preserving the existing JS implementation for non-default options.
Socket destroy now stops active reads to prevent leaks (
7f8b903)
Closing node:net and node:tls sockets now explicitly stops any in-flight read before clearing the JS handle, breaking the retention chain that kept Socket/TCPWrap objects alive. This fixes an unbounded per-connection heap leak for code that churns TCP connections.
SQLite StatementSync hot paths are faster (
c35cef0)
sqlite.StatementSync.run() now uses direct data-property creation for its result object, and all() hoists column names out of the row loop so they’re built once and reused. These changes reduce repeated FFI/string work and should improve the common insert/select paths that were profiling notably slower than Node.
Event subclasses with read-only toStringTag no longer throw (d279878)
Event.prototype[Symbol.toStringTag] is now defined on the prototype with the standard descriptor instead of being assigned per instance. This avoids construction-time failures for subclasses that inherit or define a non-writable Symbol.toStringTag, such as MessageEvent-style cases.
Deno.createHttpClient accepts http2MaxHeaderListSize (
7002a81)
A new client option lets callers cap the HTTP/2 header list size, wired through to the underlying HTTP client builder and surfaced in the type definitions. This is a public API expansion for users needing tighter HTTP/2 behavior control.
--min-dep-age is now a CLI alias (c3d9d44)
The dependency-age policy flag now accepts the shorter --min-dep-age spelling alongside the existing long form. The hint text was updated too, making the policy easier to discover and use.
atob avoids a large-path memcpy (5e48ef4)
Large base64 decodes now return the freshly decoded buffer directly instead of copying back into the input string buffer first. That trims a full-size memory copy from the hot path and improves throughput for big payloads.
TTY writes now let the process exit when idle (bc58c2a)
Idle TTY handles are now deactivated once reads/writes/shutdown work is done, so a completed stdio write no longer keeps the event loop alive unnecessarily. This fixes a real shutdown/exit behavior issue for PTY-backed stderr writes.
Other misc changes
- Release workflow tweaks: version bump prerelease handling, promoted-archive upload filtering, Mach-O signature stripping order/conditions, and disabling minimum-dependency-age in promote-to-release.
deno_astbump to 0.53.3, which collapses oversized lint diagnostic snippets.- Node compat runner cleanup: removed redundant unstable flags.