perf: small optimization

packages/vitest/src/node/logger.ts

@@ -23,15 +23,14 @@ const ERASE_DOWN = `${ESC}J`
 const ERASE_SCROLLBACK = `${ESC}3J`
 const CURSOR_TO_START = `${ESC}1;1H`
 const CLEAR_SCREEN = '\x1Bc'
-const HIGHLIGHT_SUPPORTED_LANGS = ['js', 'ts']
-const HIGHLIGHT_SUPPORTED_EXTS = HIGHLIGHT_SUPPORTED_LANGS.flatMap(lang => [
+const HIGHLIGHT_SUPPORTED_EXTS = new Set(['js', 'ts'].flatMap(lang => [
   `.${lang}`,
   `.m${lang}`,
   `.c${lang}`,
   `.${lang}x`,
   `.m${lang}x`,
   `.c${lang}x`,
-])
+]))
 
 export class Logger {
   outputStream = process.stdout
@@ -114,7 +113,7 @@ export class Logger {
     if (this._highlights.has(filename))
       return this._highlights.get(filename)!
     const ext = extname(filename)
-    if (!HIGHLIGHT_SUPPORTED_EXTS.includes(ext))
+    if (!HIGHLIGHT_SUPPORTED_EXTS.has(ext))
       return source
     const isJsx = ext.endsWith('x')
     const code = highlight(source, { jsx: isJsx, colors: c })