From 6e8c4e004aac9a181950430e4b02c57eee7aad05 Mon Sep 17 00:00:00 2001
From: uzlopak <aras.abbasi@googlemail.com>
Date: Sun, 30 Jul 2023 18:32:13 +0200
Subject: [PATCH 1/2] perf: avoid domainToAscii on pure cases

---
 index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index c9b69dd..553ed4b 100644
--- a/index.js
+++ b/index.js
@@ -178,6 +178,8 @@ function serialize (cmpts, opts) {
   return uriTokens.join('')
 }
 
+const NON_ASCII_HOST = /[^!"$&'()*+,.;=_`a-z{}~-]/
+
 const URI_PARSE = /^(?:([^:/?#]+):)?(?:\/\/((?:([^/?#@]*)@)?(\[[^/?#\]]+\]|[^/?#:]*)(?::(\d*))?))?([^?#]*)(?:\?([^#]*))?(?:#((?:.|\n|\r)*))?/i
 
 function parse (uri, opts) {
@@ -239,7 +241,7 @@ function parse (uri, opts) {
     // check if scheme can't handle IRIs
     if (!options.unicodeSupport && (!schemeHandler || !schemeHandler.unicodeSupport)) {
       // if host component is a domain name
-      if (parsed.host && (options.domainHost || (schemeHandler && schemeHandler.domainHost))) {
+      if (parsed.host && (options.domainHost || (schemeHandler && schemeHandler.domainHost)) && NON_ASCII_HOST.test(parsed.host)) {
         // convert Unicode IDN -> ASCII IDN
         try {
           parsed.host = URL.domainToASCII(parsed.host.toLowerCase())

From 92f7e8883ac6b93ecdff6db7295280127176b45a Mon Sep 17 00:00:00 2001
From: uzlopak <aras.abbasi@googlemail.com>
Date: Tue, 15 Aug 2023 13:24:30 +0200
Subject: [PATCH 2/2] use fn instead of re

---
 index.js | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/index.js b/index.js
index 553ed4b..873041a 100644
--- a/index.js
+++ b/index.js
@@ -178,7 +178,18 @@ function serialize (cmpts, opts) {
   return uriTokens.join('')
 }
 
-const NON_ASCII_HOST = /[^!"$&'()*+,.;=_`a-z{}~-]/
+const hexLookUp = Array.from({ length: 127 }, (v, k) => /[^!"$&'()*+,.;=_`a-z{}~-]/.test(String.fromCharCode(k)))
+
+function nonSimpleDomain (value) {
+  let code = 0
+  for (let i = 0, len = value.length; i < len; ++i) {
+    code = value.charCodeAt(i)
+    if (code > 126 || hexLookUp[code]) {
+      return true
+    }
+  }
+  return false
+}
 
 const URI_PARSE = /^(?:([^:/?#]+):)?(?:\/\/((?:([^/?#@]*)@)?(\[[^/?#\]]+\]|[^/?#:]*)(?::(\d*))?))?([^?#]*)(?:\?([^#]*))?(?:#((?:.|\n|\r)*))?/i
 
@@ -241,7 +252,7 @@ function parse (uri, opts) {
     // check if scheme can't handle IRIs
     if (!options.unicodeSupport && (!schemeHandler || !schemeHandler.unicodeSupport)) {
       // if host component is a domain name
-      if (parsed.host && (options.domainHost || (schemeHandler && schemeHandler.domainHost)) && NON_ASCII_HOST.test(parsed.host)) {
+      if (parsed.host && (options.domainHost || (schemeHandler && schemeHandler.domainHost)) && nonSimpleDomain(parsed.host)) {
         // convert Unicode IDN -> ASCII IDN
         try {
           parsed.host = URL.domainToASCII(parsed.host.toLowerCase())