perf: optimize validate http token

lib/core/util.js

@@ -666,48 +666,46 @@ function addAbortListener (signal, listener) {
   return () => signal.removeListener('abort', listener)
 }
 
+const validTokenChars = new Uint8Array([
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0-15
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16-31
+  0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32-47 (!"#$%&'()*+,-./)
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48-63 (0-9:;<=>?)
+  0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64-79 (@A-O)
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80-95 (P-Z[\]^_)
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96-111 (`a-o)
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, // 112-127 (p-z{|}~)
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 128-143
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 144-159
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 160-175
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 176-191
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 192-207
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 208-223
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 224-239
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  // 240-255
+])
+
 /**
  * @see https://tools.ietf.org/html/rfc7230#section-3.2.6
  * @param {number} c
  * @returns {boolean}
  */
 function isTokenCharCode (c) {
-  switch (c) {
-    case 0x22:
-    case 0x28:
-    case 0x29:
-    case 0x2c:
-    case 0x2f:
-    case 0x3a:
-    case 0x3b:
-    case 0x3c:
-    case 0x3d:
-    case 0x3e:
-    case 0x3f:
-    case 0x40:
-    case 0x5b:
-    case 0x5c:
-    case 0x5d:
-    case 0x7b:
-    case 0x7d:
-      // DQUOTE and "(),/:;<=>?@[\]{}"
-      return false
-    default:
-      // VCHAR %x21-7E
-      return c >= 0x21 && c <= 0x7e
-  }
+  return (validTokenChars[c] === 1)
 }
 
+const tokenRegExp = /^[\^_`a-zA-Z\-0-9!#$%&'*+.|~]+$/
+
 /**
  * @param {string} characters
  * @returns {boolean}
  */
 function isValidHTTPToken (characters) {
-  if (characters.length === 0) {
-    return false
-  }
-  for (let i = 0; i < characters.length; ++i) {
-    if (!isTokenCharCode(characters.charCodeAt(i))) {
+  if (characters.length >= 12) return tokenRegExp.test(characters)
+  if (characters.length === 0) return false
+
+  for (let i = 0; i < characters.length; i++) {
+    if (validTokenChars[characters.charCodeAt(i)] !== 1) {
       return false
     }
   }