Bun v1.0.4 released, JavaScript runtime written by Zig

Bun 1.0 has released its fourth patch update: 1.0.4 .

Bun is an extremely fast JavaScript runtime written in Zig that combines a bundler, translator, and package manager.

This release fixes 62 bugs, adds server.requestIPsupport for virtual modules in runtime plugins, and reduces Bun.serve()memory consumption in .

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• Reduce Bun.serve()memory consumption in

Bun.serve() Manually managed per-request memory usage is now reported to JavaScriptCore's garbage collector. In some cases, this Bun.serve()reduces memory usage by 50%.

• accomplishserver.requestIP

server.requestIP()A given IP address can now be retrieved using Request.

Bun.serve({
  port: 3000,
  handler: (req, res) => {
    console.log(server.requestIP(req));
  },
});

• Bun.plugin Virtual Module in

Bun's plugin system has become more flexible and compatible with esbuild. In addition to custom loaders (  import stuff from "./stuff.foo" ), it now supports fully virtual modules (  import stuff from "foo" ). Developers can register virtual modules by registering plug-ins.

import { plugin } from "bun";

plugin({
  name: "my plugin",
  setup(builder) {
    builder.module("my-virtual-module", () => {
      return {
        exports: {
          hello: "world",
        },
        loader: "object",
      };
    });
  },
});

This virtual module can then be used like a normal module:

import { hello } from "my-virtual-module";
console.log(hello); // "world"

// require("my-virtual-module") also works
// await import("my-virtual-module") also works
// require.resolve("my-virtual-module") also works

Details .