perf: use node native parser

Fixes: #22

lib/client-base.js

@@ -3,7 +3,6 @@
 const { URL } = require('url')
 const net = require('net')
 const tls = require('tls')
-const { HTTPParser } = require('http-parser-js')
 const EventEmitter = require('events')
 const Request = require('./request')
 const assert = require('assert')
@@ -39,6 +38,8 @@ const {
   kEnqueue,
   kClient
 } = require('./symbols')
+// TODO: This is not really allowed by Node but it works for now.
+const HTTPParser = process.binding('http_parser').HTTPParser // eslint-disable-line
 
 const CRLF = Buffer.from('\r\n', 'ascii')
 const TE_CHUNKED = Buffer.from('transfer-encoding: chunked\r\n', 'ascii')
@@ -285,23 +286,40 @@ class ClientBase extends EventEmitter {
   }
 }
 
+class HTTPServerAsyncResource {
+  constructor (type, socket) {
+    this.type = type
+    this.socket = socket
+  }
+}
+
 class Parser extends HTTPParser {
   constructor (client, socket) {
-    super(HTTPParser.RESPONSE)
+    super()
 
     this.client = client
     this.socket = socket
     this.resumeSocket = () => socket.resume()
     this.read = 0
     this.body = null
+
+    this.initialize(
+      HTTPParser.RESPONSE,
+      // TODO: What to do with these options?
+      new HTTPServerAsyncResource('HTTPINCOMINGMESSAGE', socket),
+      0,
+      false,
+      0
+    )
   }
 
   /* istanbul ignore next: we don't support trailers yet */
   [HTTPParser.kOnHeaders] () {
     // TODO: Handle trailers.
   }
 
-  [HTTPParser.kOnHeadersComplete] ({ statusCode, headers }) {
+  [HTTPParser.kOnHeadersComplete] (versionMajor, versionMinor, headers, method,
+    url, statusCode, statusMessage, upgrade, shouldKeepAlive) {
     const { client, resumeSocket } = this
     const request = client[kQueue][client[kRunningIdx]]
     const { signal, opaque } = request

package.json

@@ -36,9 +36,6 @@
     "standard": "^14.0.0",
     "tap": "^14.0.0"
   },
-  "dependencies": {
-    "http-parser-js": "^0.5.2"
-  },
   "pre-commit": [
     "coverage"
   ]