v0.3.5

0.3.5

Features

• node:fs adds read and write streams, including fs.createReadStream and fs.createWriteStream.
• util.promisify works over child_process.exec and the fs callback functions that have an fs/promises counterpart.
• node:net adds socket.address(), socket.resetAndDestroy() and server.dropMaxConnection, and node:dgram supports the socket options and disconnect().
• node:tls adds getProtocol, getCipher, alpnProtocol and tls.DEFAULT_MIN_VERSION/DEFAULT_MAX_VERSION.
• events.once works on EventEmitter instances.
• Checked JSON records keep keys they do not declare, and compound assignment with untyped operands compiles.

Performance

• Map and Set headers and small entry arrays are smaller: an empty map takes 100 bytes instead of 188.
• Released lifetime regions are freed without a pass over the whole heap.
• The cycle collector frees its large work vectors after a pass, and intact parsed JSON documents skip cycle collection.
• Classes keep a property bag only when something stores into it, and class and record views without dynamic stores emit no commit adapters.
• Integer arithmetic is proven through calls and module-level code, pure number recursion runs on integer clones, and array lengths load with the range of a JS array length.
• Closed virtual calls are dispatched directly, read-modify-write operations reuse their Map lookup, and never-reassigned bindings are read as values.
• Generators, user iterators and awaits cost less per value, and promises use a smaller block allocated inline.
• SHA-1 and SHA-256 use the SHA extensions on x86-64, about 4 to 5 times faster than before.
• Regex exec results, parseInt of captures, UTF-8 file reads, string-and-number concatenation and small Buffer allocation are cheaper, and JSON.parse storage fits its length.
• The main thread leaves its heap to the operating system at exit.

Fixes

• Sockets read ahead without a consumer, so a peer's close reaches them.
• Publication walkers with more than ten pushes keep distinct value names, and int32 field storage survives reflection reads through unknown.
• Native program objects use runtime ABI v22. External object consumers must link the matching v0.3.5 runtime pack; the versioned marker rejects incompatible runtime objects at link time.