Run in parallel

tools/gulp/tasks/payload.ts

@@ -34,26 +34,13 @@ task('payload', ['material:clean-build'], async () => {
     // Open a connection to Firebase. For PRs the connection will be established as a guest.
     const database = openFirebaseDashboardApp(!isTravisMasterBuild());
     const currentSha = process.env['TRAVIS_PULL_REQUEST_SHA'] || process.env['TRAVIS_COMMIT'];
-    const authToken = process.env['FIREBASE_ACCESS_TOKEN'];
-    const previousPayload = await getLastPayloadResults(database);
 
-    // Calculate library sizes by combining the CDK and Material FESM 2015 bundles.
-    const previousSize = previousPayload.cdk_fesm_2015 + previousPayload.material_fesm_2015;
-    const currentSize = results.cdk_fesm_2015 + results.material_fesm_2015;
-    const deltaSize = currentSize - previousSize;
-
-    // Publish the results to firebase when it runs on Travis but not as a PR.
-    if (isTravisMasterBuild()) {
-      await database.ref('payloads').child(currentSha).set(results);
-    }
-
-    if (authToken) {
-      // Update the Github status of the current commit by sending a request to the dashboard
-      // firebase http trigger function.
-      await updateGithubStatus(currentSha, deltaSize, authToken);
-    } else {
-      console.warn('Cannot set the Github status because there is no "FIREBASE_ACCESS_TOKEN" set.');
-    }
+    // Upload the payload results and calculate the payload diff in parallel. Otherwise the
+    // payload task will take much more time inside of Travis builds.
+    await Promise.all([
+      uploadPayloadResults(database, currentSha, results),
+      calculatePayloadDiff(database, currentSha, results)
+    ]);
 
     // Disconnect database connection because Firebase otherwise prevents Gulp from exiting.
     database.delete();
@@ -71,6 +58,31 @@ function getFilesize(filePath: string) {
   return statSync(filePath).size / 1000;
 }
 
+/**
+ * Calculates the difference between the last and current library payload.
+ * The results will be published as a commit status on Github.
+ */
+async function calculatePayloadDiff(database: any, currentSha: string, currentPayload: any) {
+  const authToken = process.env['FIREBASE_ACCESS_TOKEN'];
+
+  if (!authToken) {
+    console.error('Cannot calculate Payload diff because there is no "FIREBASE_ACCESS_TOKEN" ' +
+      'environment variable set.');
+    return;
+  }
+
+  const previousPayload = await getLastPayloadResults(database);
+
+  // Calculate library sizes by combining the CDK and Material FESM 2015 bundles.
+  const previousSize = previousPayload.cdk_fesm_2015 + previousPayload.material_fesm_2015;
+  const currentSize = currentPayload.cdk_fesm_2015 + currentPayload.material_fesm_2015;
+  const deltaSize = currentSize - previousSize;
+
+  // Update the Github status of the current commit by sending a request to the dashboard
+  // firebase http trigger function.
+  await updateGithubStatus(currentSha, deltaSize, authToken);
+}
+
 /**
  * Updates the Github status of a given commit by sending a request to a Firebase function of
  * the dashboard. The function has access to the Github repository and can set status for PRs too.
@@ -98,6 +110,13 @@ async function updateGithubStatus(commitSha: string, payloadDiff: number, authTo
   });
 }
 
+/** Uploads the current payload results to the Dashboard database. */
+async function uploadPayloadResults(database: any, currentSha: string, currentPayload: any) {
+  if (isTravisMasterBuild()) {
+    await database.ref('payloads').child(currentSha).set(currentPayload);
+  }
+}
+
 /** Gets the last payload uploaded from previous Travis builds. */
 async function getLastPayloadResults(database: admin.database.Database) {
   const snapshot = await database.ref('payloads')