ONREZA Core (deno_core fork)

Fork of deno_core with V8 Locker API support for multi-isolate pooling.

Why this fork?

The upstream

uses

rusty_v8

which doesn't expose V8's Locker API. This makes it impossible to:

• Pool multiple isolates on a single thread
• Safely switch between isolates without thread-local state issues
• Implement efficient isolate reuse patterns

This fork replaces

with openworkers-v8 which provides Locker/UnenteredIsolate support.

Changes from upstream

1. V8 binding:
   v8
   →
   openworkers-v8
   (with Locker API)
2. JsRuntime: Modified to use Locker for isolate access (WIP)
3. Thread safety: Proper isolate locking for multi-isolate scenarios

Usage

Syncing with upstream

Project

This fork is maintained by ONREZA for use in nrz-isolate — a JavaScript runtime for edge functions.

License

MIT (same as upstream deno_core)

---

Original README

The core engine at the heart of Deno.

Contributing to upstream

To contribute to the original project, please read the contributing instructions.