perf: speed up memory batch polling

src/runtime.ts

@@ -1,3 +1,5 @@
+import { clearActiveProgressLine } from "./terminal/progress-line.js";
+
 export type RuntimeEnv = {
   log: typeof console.log;
   error: typeof console.error;
@@ -5,8 +7,14 @@ export type RuntimeEnv = {
 };
 
 export const defaultRuntime: RuntimeEnv = {
-  log: console.log,
-  error: console.error,
+  log: (...args: Parameters<typeof console.log>) => {
+    clearActiveProgressLine();
+    console.log(...args);
+  },
+  error: (...args: Parameters<typeof console.error>) => {
+    clearActiveProgressLine();
+    console.error(...args);
+  },
   exit: (code) => {
     process.exit(code);
     throw new Error("unreachable"); // satisfies tests when mocked