crypto: make createXYZ inlineable

This commit increase by around 10% hot code paths that are hitting
createXYZ functions. Before this change the createXYZ called the XYZ
constructor without new.

PR-URL: #16067
Backport-PR-URL: #16446
Reviewed-By: Bryan English <bryan@bryanenglish.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yosuke Furukawa <yosuke.furukawa@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Benedikt Meurer <benedikt.meurer@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

lib/crypto.js

@@ -74,7 +74,7 @@ const assert = require('assert');
 const StringDecoder = require('string_decoder').StringDecoder;
 
 
-exports.createHash = exports.Hash = Hash;
+exports.Hash = Hash;
 function Hash(algorithm, options) {
   if (!(this instanceof Hash))
     return new Hash(algorithm, options);
@@ -108,7 +108,7 @@ Hash.prototype.digest = function digest(outputEncoding) {
 };
 
 
-exports.createHmac = exports.Hmac = Hmac;
+exports.Hmac = Hmac;
 
 function Hmac(hmac, key, options) {
   if (!(this instanceof Hmac))
@@ -134,7 +134,7 @@ function getDecoder(decoder, encoding) {
 }
 
 
-exports.createCipher = exports.Cipher = Cipher;
+exports.Cipher = Cipher;
 function Cipher(cipher, password, options) {
   if (!(this instanceof Cipher))
     return new Cipher(cipher, password, options);
@@ -211,7 +211,7 @@ Cipher.prototype.setAAD = function setAAD(aadbuf) {
   return this;
 };
 
-exports.createCipheriv = exports.Cipheriv = Cipheriv;
+exports.Cipheriv = Cipheriv;
 function Cipheriv(cipher, key, iv, options) {
   if (!(this instanceof Cipheriv))
     return new Cipheriv(cipher, key, iv, options);
@@ -233,7 +233,7 @@ Cipheriv.prototype.getAuthTag = Cipher.prototype.getAuthTag;
 Cipheriv.prototype.setAuthTag = Cipher.prototype.setAuthTag;
 Cipheriv.prototype.setAAD = Cipher.prototype.setAAD;
 
-exports.createDecipher = exports.Decipher = Decipher;
+exports.Decipher = Decipher;
 function Decipher(cipher, password, options) {
   if (!(this instanceof Decipher))
     return new Decipher(cipher, password, options);
@@ -258,7 +258,7 @@ Decipher.prototype.setAuthTag = Cipher.prototype.setAuthTag;
 Decipher.prototype.setAAD = Cipher.prototype.setAAD;
 
 
-exports.createDecipheriv = exports.Decipheriv = Decipheriv;
+exports.Decipheriv = Decipheriv;
 function Decipheriv(cipher, key, iv, options) {
   if (!(this instanceof Decipheriv))
     return new Decipheriv(cipher, key, iv, options);
@@ -283,7 +283,7 @@ Decipheriv.prototype.setAuthTag = Cipher.prototype.setAuthTag;
 Decipheriv.prototype.setAAD = Cipher.prototype.setAAD;
 
 
-exports.createSign = exports.Sign = Sign;
+exports.Sign = Sign;
 function Sign(algorithm, options) {
   if (!(this instanceof Sign))
     return new Sign(algorithm, options);
@@ -339,7 +339,7 @@ Sign.prototype.sign = function sign(options, encoding) {
 };
 
 
-exports.createVerify = exports.Verify = Verify;
+exports.Verify = Verify;
 function Verify(algorithm, options) {
   if (!(this instanceof Verify))
     return new Verify(algorithm, options);
@@ -410,7 +410,7 @@ exports.privateDecrypt = rsaPrivate(binding.privateDecrypt,
                                     constants.RSA_PKCS1_OAEP_PADDING);
 
 
-exports.createDiffieHellman = exports.DiffieHellman = DiffieHellman;
+exports.DiffieHellman = DiffieHellman;
 
 function DiffieHellman(sizeOrKey, keyEncoding, generator, genEncoding) {
   if (!(this instanceof DiffieHellman))
@@ -452,9 +452,7 @@ function DiffieHellman(sizeOrKey, keyEncoding, generator, genEncoding) {
 }
 
 
-exports.DiffieHellmanGroup =
-    exports.createDiffieHellmanGroup =
-    exports.getDiffieHellman = DiffieHellmanGroup;
+exports.DiffieHellmanGroup = DiffieHellmanGroup;
 
 function DiffieHellmanGroup(name) {
   if (!(this instanceof DiffieHellmanGroup))
@@ -561,7 +559,7 @@ DiffieHellman.prototype.setPrivateKey = function setPrivateKey(key, encoding) {
 };
 
 
-exports.createECDH = exports.ECDH = ECDH;
+exports.ECDH = ECDH;
 function ECDH(curve) {
   if (!(this instanceof ECDH))
     return new ECDH(curve);
@@ -607,6 +605,66 @@ ECDH.prototype.getPublicKey = function getPublicKey(encoding, format) {
 };
 
 
+// These helper functions are needed because the constructors can
+// use new, in which case V8 cannot inline the recursive constructor call
+function createHash(algorithm, options) {
+  return new Hash(algorithm, options);
+}
+
+function createCipher(cipher, password, options) {
+  return new Cipher(cipher, password, options);
+}
+
+function createCipheriv(cipher, key, iv, options) {
+  return new Cipheriv(cipher, key, iv, options);
+}
+
+function createDecipher(cipher, password, options) {
+  return new Decipher(cipher, password, options);
+}
+
+function createDecipheriv(cipher, key, iv, options) {
+  return new Decipheriv(cipher, key, iv, options);
+}
+
+function createDiffieHellman(sizeOrKey, keyEncoding, generator, genEncoding) {
+  return new DiffieHellman(sizeOrKey, keyEncoding, generator, genEncoding);
+}
+
+function createDiffieHellmanGroup(name) {
+  return new DiffieHellmanGroup(name);
+}
+
+function createECDH(curve) {
+  return new ECDH(curve);
+}
+
+function createHmac(hmac, key, options) {
+  return new Hmac(hmac, key, options);
+}
+
+function createSign(algorithm, options) {
+  return new Sign(algorithm, options);
+}
+
+function createVerify(algorithm, options) {
+  return new Verify(algorithm, options);
+}
+
+exports.createHash = createHash;
+exports.createCipher = createCipher;
+exports.createCipheriv = createCipheriv;
+exports.createDecipher = createDecipher;
+exports.createDecipheriv = createDecipheriv;
+exports.createDiffieHellman = createDiffieHellman;
+exports.createDiffieHellmanGroup =
+  exports.getDiffieHellman = createDiffieHellmanGroup;
+exports.createECDH = createECDH;
+exports.createHmac = createHmac;
+exports.createSign = createSign;
+exports.createVerify = createVerify;
+
+
 exports.pbkdf2 = function(password,
                           salt,
                           iterations,