Version 1.3.11

[sinclairzx81]

This PR implements optimizations for System.Memory.Clone and System.Memory.Discard to improve type initialization.

Updates

The optimizations were as follows:

• Use Object.getOwnPropertyNames(...) to Enumerate Keys
• Call Object.getOwnPropertyDescriptor(...) on Per Enumerated Key
• Check IsEnumerable on Descriptor before assignment.
• Use Object.defineProperty(...) if NonEnumerable
• Use Record[Key] = X if Enumerable

The primary performance boost comes from record[key] = value assignment over defineProperty, and the per key getOwnPropertyDescriptor(...) call.

Benchmarks

Updates were tested against the TB turing benchmark. Performance shows approx 3-4x throughput performance for the "time to complete" test.

turing: 14492ms  # before
turing: 3915ms   # after

Before

Program {
  gc: {
    rss: "186.47 MB",
    heapTotal: "88.08 MB",
    heapUsed: "31.56 MB",
    external: "1.12 MB",
    arrayBuffers: "0.00 MB"
  },
  tb: {
    assign: 11624,
    create: 746063,
    clone: 96587,
    discard: 86376,
    update: 10211
  }
}
// turing: 14492ms 

After

Program {
  gc: {
    rss: "185.29 MB",
    heapTotal: "86.08 MB",
    heapUsed: "49.36 MB",
    external: "1.12 MB",
    arrayBuffers: "0.00 MB"
  },
  tb: {
    assign: 11624,
    create: 746063,
    clone: 10211,
    discard: 86376,
    update: 10211
  },
}
// turing: 3915ms