message: example testing uses the number of CPUs on the machine
diff: @@ -5,6 +5,8 @@ const { file } = require("tmp-promise");
  const { writeFile } = require("fs-extra");
  const toneJson = require("../docs/tone.json");
  const eachLimit = require("async/eachLimit");
  +const os = require("os");
  +const cpuCount = os.cpus().length;
  /**
  * Get all of the examples
  @@ -55,7 +57,7 @@ async function testExampleString(str) {
  // work with file here in fd
  await writeFile(path, str);
  try {
  - await execPromise(`tsc ${path}`);
  + await execPromise(`tsc ${path} --noEmit`);
  } finally {
  cleanup();
  }
  @@ -65,7 +67,7 @@ const examples = findExamples(toneJson);
  async function main() {
  let passed = 0;
  - await eachLimit(examples, 4, async example => {
  + await eachLimit(examples, cpuCount, async example => {
  try {
  await testExampleString(example);
  passed++;
  