perf: cache ANSI prefix regex in truncate instead of re-creating per call

render.ts

@@ -2,6 +2,7 @@ import type { ModuleSpec, RenderedModule } from "./types";
 
 // eslint-disable-next-line no-control-regex
 const ANSI_RE = new RegExp("\\u001b\\[[0-9;]*m", "g");
+const ANSI_PREFIX_RE = /^\u001b\[[0-9;]*m/;
 
 export function visibleWidth(text: string): number {
   return text.replace(ANSI_RE, "").length;
@@ -16,8 +17,7 @@ export function truncate(text: string, width: number): string {
   let count = 0;
   for (let index = 0; index < text.length && count < width; index++) {
     if (text[index] === "\x1b") {
-      // eslint-disable-next-line no-control-regex
-      const match = text.slice(index).match(new RegExp("^\\u001b\\[[0-9;]*m"));
+      const match = text.slice(index).match(ANSI_PREFIX_RE);
       if (match) {
         output += match[0];
         index += match[0].length - 1;