lib: refactor tls options handle in https.js

[gengjiawen]

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

[lpinca]

@gengjiawen a for loop was not used for performance reasons. See discussion in #16402.

[gengjiawen]

@gengjiawen a for loop was not used for performance reasons. See discussion in #16402.

Looks like 2x diff (Node node: '12.0.0-pre', v8: '7.3.492.25-node.7')

es\arrary-vs-invidual.js mode="Array" n=1000: 263,026.3123632099
es\arrary-vs-invidual.js mode="Invidual" n=1000: 469,417.45294090034

'use strict';

const common = require('../common.js');
const configs = {
  n: [1e3],
  mode: ['Array', 'Invidual']
};

const bench = common.createBenchmark(main, configs);

function main({ n, mode }) {
  switch (mode) {
    case '':
    // Empty string falls through to next line as default, mostly for tests.
    case 'Array':
      bench.start();
      for (let i = 0; i < n; i++)
        useArray();
      bench.end(n);
      break;
    case 'Invidual':
      bench.start();
      for (let i = 0; i < n; i++)
        useInvidual();
      bench.end(n);
      break;
    default:
      throw new Error(`Unexpected method "${mode}"`);
  }
}

function useArray() {
  let name = '';
  let options = {};
  const options_keys = [
    'ca',
    'cert',
    'ciphers',
    'clientCertEngine',
    'crl',
    'dhparam',
    'ecdhCurve',
    'honorCipherOrder',
    'key',
    'maxVersion',
    'minVersion',
    'pfx',
    'rejectUnauthorized',
    'secureOptions',
    'secureProtocol',
    'sessionIdContext'
  ];

  options_keys.forEach((i) => {
    name += ':';
    if (options[i]) {
      name += options[i];
    }
  });

  name += ':';
  if (options.servername && options.servername !== options.host)
    name += options.servername;

  return name;
}

function useInvidual() {
  let name = '';
  let options = {};

  name += ':';
  if (options.ca)
    name += options.ca;

  name += ':';
  if (options.cert)
    name += options.cert;

  name += ':';
  if (options.clientCertEngine)
    name += options.clientCertEngine;

  name += ':';
  if (options.ciphers)
    name += options.ciphers;

  name += ':';
  if (options.key)
    name += options.key;

  name += ':';
  if (options.pfx)
    name += options.pfx;

  name += ':';
  if (options.rejectUnauthorized !== undefined)
    name += options.rejectUnauthorized;

  name += ':';
  if (options.servername && options.servername !== options.host)
    name += options.servername;

  name += ':';
  if (options.minVersion)
    name += options.minVersion;

  name += ':';
  if (options.maxVersion)
    name += options.maxVersion;

  name += ':';
  if (options.secureProtocol)
    name += options.secureProtocol;

  name += ':';
  if (options.crl)
    name += options.crl;

  name += ':';
  if (options.honorCipherOrder !== undefined)
    name += options.honorCipherOrder;

  name += ':';
  if (options.ecdhCurve)
    name += options.ecdhCurve;

  name += ':';
  if (options.dhparam)
    name += options.dhparam;

  name += ':';
  if (options.secureOptions !== undefined)
    name += options.secureOptions;

  name += ':';
  if (options.sessionIdContext)
    name += options.sessionIdContext;

  return name;
}