Every transport piece moves material at belt speed and capacity (t105)

test/t_threads.js

@@ -67,6 +67,21 @@ function hash() {
   run('const forwardChunks=runChunks;runChunks=(chunks,pass,work)=>forwardChunks(chunks.slice().reverse(),pass,work);for(let k=0;k<320;k++)simTick();runChunks=forwardChunks;');
   assert.strictEqual(hash(),expected,'chunk order within a colour must not matter');
   console.log('PASS reversing chunks within every pass preserves all bytes and effects');
+  run(require('fs').readFileSync('test/fixtures/t105-transport.js','utf8'));
+  let chainExpected;
+  for(const n of [0,1,2,8]) {
+    flatWorld(run,320,256,240);
+    run(`WS=456;resetWeather();seen.fill(0);ledger={};EV.length=0;
+      for(const k of Object.keys(stats))stats[k]=0;resetEconomy();
+      globalThis.ts=transportChainFixture();`);
+    const stop=n?await enableThreads(run,n):null;
+    try {
+      run('for(let k=0;k<1000;k++){transportFeed(ts,16);simTick();transportCollect(ts);}');
+      const actual=hash();if(!chainExpected)chainExpected=actual;
+      assert.strictEqual(actual,chainExpected,`mixed transport chain differs with ${n} workers`);
+      console.log(`PASS mixed transport chain is identical with ${n} workers (${actual.slice(0,16)})`);
+    } finally {if(stop)await stop();}
+  }
   const {execFileSync}=require('child_process');
   const fallback=execFileSync(process.execPath,['-e',`
     global.SharedArrayBuffer=undefined;