Concurrent Function Upgrade for Enhanced Performance (#4918)

Summary:
Republishing sanjaiyan-dev's PR https://github.com/facebook/flipper/pull/4889 running `git rebase` because of a conflict.

Pull Request resolved: https://github.com/facebook/flipper/pull/4918

Reviewed By: lblasa

Differential Revision: D47294545

Pulled By: passy

fbshipit-source-id: 74904ec6179ed5a3bab6f9b701c3cd769ecad3bf

desktop/scripts/build-flipper-server-release.tsx

@@ -456,9 +456,11 @@ async function buildServerRelease() {
     platforms.push(BuildPlatform.WINDOWS);
   }
 
-  for (const platform of platforms) {
-    await bundleServerReleaseForPlatform(dir, versionNumber, platform);
-  }
+  await Promise.all(
+    platforms.map((platform) =>
+      bundleServerReleaseForPlatform(dir, versionNumber, platform),
+    ),
+  );
 }
 
 function nodeArchFromBuildPlatform(platform: BuildPlatform): string {

desktop/scripts/build-utils.tsx

@@ -168,8 +168,7 @@ export async function moveSourceMaps(
     // If we don't move them out of the build folders, they'll get included in the ASAR
     // which we don't want.
     console.log(`⏭  Removing source maps.`);
-    await fs.remove(mainBundleMap);
-    await fs.remove(rendererBundleMap);
+    await Promise.all([fs.remove(mainBundleMap), fs.remove(rendererBundleMap)]);
   }
 }
 

desktop/scripts/workspaces.tsx

@@ -69,9 +69,12 @@ async function getWorkspacesByRoot(
 }
 
 export async function getWorkspaces(): Promise<Workspaces> {
-  const rootWorkspaces = await getWorkspacesByRoot(rootDir);
-  const publicPluginsWorkspaces = await getWorkspacesByRoot(publicPluginsDir);
-  const fbPluginsWorkspaces = await getWorkspacesByRoot(fbPluginsDir);
+  const [rootWorkspaces, publicPluginsWorkspaces, fbPluginsWorkspaces] =
+    await Promise.all([
+      getWorkspacesByRoot(rootDir),
+      getWorkspacesByRoot(publicPluginsDir),
+      getWorkspacesByRoot(fbPluginsDir),
+    ]);
   const mergedWorkspaces: Workspaces = {
     rootPackage: rootWorkspaces!.rootPackage,
     packages: [