url: improve performance by removing host

PR-URL: #46547
Backport-PR-URL: #47435
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Filip Skokan <panva.ip@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

lib/internal/url.js

@@ -145,7 +145,6 @@ class URLContext {
   href = '';
   origin = '';
   protocol = '';
-  host = '';
   hostname = '';
   pathname = '';
   search = '';
@@ -634,14 +633,13 @@ class URL {
     return constructHref(this[context], options);
   }
 
-  #onParseComplete = (href, origin, protocol, host, hostname, pathname,
+  #onParseComplete = (href, origin, protocol, hostname, pathname,
                       search, username, password, port, hash, hasHost,
                       hasOpaquePath) => {
     const ctx = this[context];
     ctx.href = href;
     ctx.origin = origin;
     ctx.protocol = protocol;
-    ctx.host = host;
     ctx.hostname = hostname;
     ctx.pathname = pathname;
     ctx.search = search;
@@ -724,7 +722,9 @@ class URL {
   get host() {
     if (!isURLThis(this))
       throw new ERR_INVALID_THIS('URL');
-    return this[context].host;
+    const port = this[context].port;
+    const suffix = port.length > 0 ? `:${port}` : '';
+    return this[context].hostname + suffix;
   }
 
   set host(value) {

src/node_url.cc

@@ -52,16 +52,15 @@ void SetArgs(Environment* env, Local<Value> argv[12], const ada::result& url) {
   argv[0] = Utf8String(isolate, url->get_href());
   argv[1] = Utf8String(isolate, url->get_origin());
   argv[2] = Utf8String(isolate, url->get_protocol());
-  argv[3] = Utf8String(isolate, url->get_host());
-  argv[4] = Utf8String(isolate, url->get_hostname());
-  argv[5] = Utf8String(isolate, url->get_pathname());
-  argv[6] = Utf8String(isolate, url->get_search());
-  argv[7] = Utf8String(isolate, url->get_username());
-  argv[8] = Utf8String(isolate, url->get_password());
-  argv[9] = Utf8String(isolate, url->get_port());
-  argv[10] = Utf8String(isolate, url->get_hash());
-  argv[11] = Boolean::New(isolate, url->host.has_value());
-  argv[12] = Boolean::New(isolate, url->has_opaque_path);
+  argv[3] = Utf8String(isolate, url->get_hostname());
+  argv[4] = Utf8String(isolate, url->get_pathname());
+  argv[5] = Utf8String(isolate, url->get_search());
+  argv[6] = Utf8String(isolate, url->get_username());
+  argv[7] = Utf8String(isolate, url->get_password());
+  argv[8] = Utf8String(isolate, url->get_port());
+  argv[9] = Utf8String(isolate, url->get_hash());
+  argv[10] = Boolean::New(isolate, url->host.has_value());
+  argv[11] = Boolean::New(isolate, url->has_opaque_path);
 }
 
 void Parse(const FunctionCallbackInfo<Value>& args) {
@@ -108,7 +107,6 @@ void Parse(const FunctionCallbackInfo<Value>& args) {
       undef,
       undef,
       undef,
-      undef,
   };
   SetArgs(env, argv, out);
   USE(success_callback_->Call(
@@ -259,7 +257,6 @@ void UpdateUrl(const FunctionCallbackInfo<Value>& args) {
       undef,
       undef,
       undef,
-      undef,
   };
   SetArgs(env, argv, out);
   USE(success_callback_->Call(

test/parallel/test-whatwg-url-custom-inspect.js

@@ -49,7 +49,6 @@ assert.strictEqual(
     href: 'https://username:password@host.name:8080/path/name/?que=ry#hash',
     origin: 'https://host.name:8080',
     protocol: 'https:',
-    host: 'host.name:8080',
     hostname: 'host.name',
     pathname: '/path/name/',
     search: '?que=ry',