Pre-instantiate WASM core workers

src/wasm/backend.cpp

@@ -7,8 +7,7 @@
 
 #include "../lib/wasm_trace.h"
 // The native server TU has the native connectors (sqlite/mysql) compiled in, so
-// the worker's host-side connector hostcalls are available here. The W3 CLI
-// driver does not define this and gets a named-trap stub for those imports.
+// the worker's host-side connector hostcalls are available here.
 #define UCE_WASM_HOST_CONNECTORS 1
 #include "worker.cpp"
 
@@ -70,6 +69,8 @@ static String wasm_backend_ensure_started(Request* context)
 
 	g_wasm_worker = new WasmWorker(wc);
 	g_wasm_init_error = g_wasm_worker->init();
+	if(g_wasm_init_error == "")
+		g_wasm_init_error = wasm_worker_prepare(*g_wasm_worker);
 	if(g_wasm_init_error != "")
 	{
 		delete g_wasm_worker;