flow like the river

VISUALIZACION/node_modules/parcel-bundler/lib/workerfarm/fork.js

@@ -0,0 +1,51 @@
+'use strict';
+
+const childProcess = require('child_process');
+const childModule = parseInt(process.versions.node, 10) < 8 ? require.resolve('../../lib/workerfarm/child') : require.resolve('../../src/workerfarm/child');
+
+function fork(forkModule, childId) {
+  // suppress --debug / --inspect flags while preserving others (like --harmony)
+  let filteredArgs = process.execArgv.filter(v => !/^--(debug|inspect)/.test(v));
+  let options = {
+    execArgv: filteredArgs,
+    env: process.env,
+    cwd: process.cwd()
+  };
+  let child = childProcess.fork(childModule, process.argv, options);
+
+  let sendQueue = [];
+  let processQueue = true;
+
+  function send(data) {
+    if (!processQueue) {
+      return sendQueue.push(data);
+    }
+
+    let result = child.send(data, error => {
+      if (error && error instanceof Error) {
+        // Ignore this, the workerfarm handles child errors
+        return;
+      }
+
+      processQueue = true;
+
+      if (sendQueue.length > 0) {
+        let queueCopy = sendQueue.slice(0);
+        sendQueue = [];
+        queueCopy.forEach(entry => send(entry));
+      }
+    });
+
+    if (!result || /^win/.test(process.platform)) {
+      // Queue is handling too much messages throttle it
+      processQueue = false;
+    }
+  }
+
+  send({ module: forkModule, child: childId });
+
+  // return a send function for this child
+  return { send, child };
+}
+
+module.exports = fork;