fix(pluginutils): optimize createFilter and normalizePath (rollup#1750)

* perf(pluginutils): optimize `createFilter` and `normalizePath`

* fix

* fix

* fix: use `win32.sep` and `posix.sep`

---------

Co-authored-by: shellscape <[email protected]>

Author: kermanx

packages/pluginutils/src/createFilter.ts

@@ -43,9 +43,12 @@ const createFilter: CreateFilter = function createFilter(include?, exclude?, opt
   const includeMatchers = ensureArray(include).map(getMatcher);
   const excludeMatchers = ensureArray(exclude).map(getMatcher);
 
+  if (!includeMatchers.length && !excludeMatchers.length)
+    return (id) => typeof id === 'string' && !id.includes('\0');
+
   return function result(id: string | unknown): boolean {
     if (typeof id !== 'string') return false;
-    if (/\0/.test(id)) return false;
+    if (id.includes('\0')) return false;
 
     const pathId = normalizePath(id);
 

packages/pluginutils/src/normalizePath.ts

@@ -2,8 +2,10 @@ import { win32, posix } from 'path';
 
 import type { NormalizePath } from '../types';
 
+const normalizePathRegExp = new RegExp(`\\${win32.sep}`, 'g');
+
 const normalizePath: NormalizePath = function normalizePath(filename: string) {
-  return filename.split(win32.sep).join(posix.sep);
+  return filename.replace(normalizePathRegExp, posix.sep);
 };
 
 export { normalizePath as default };