feature(user-menu) speed up user menu parsing with help of worker threads

package.json

@@ -154,6 +154,7 @@
     "socket.io-client": "^2.1.1",
     "squad": "^3.0.0",
     "table": "^5.0.2",
+    "thread-it": "^1.0.1",
     "try-catch": "^2.0.0",
     "try-to-catch": "^1.0.2",
     "tryrequire": "^2.0.1",

server/server.js

@@ -10,6 +10,7 @@ const squad = require('squad');
 const tryToCatch = require('try-to-catch');
 const wraptile = require('wraptile');
 const compression = require('compression');
+const threadIt = require('thread-it');
 
 const two = currify((f, a, b) => f(a, b));
 const exit = require(DIR_SERVER + 'exit');
@@ -21,6 +22,7 @@ const promisifySelf = squad(promisify, bind);
 const shutdown = wraptile(async (promises) => {
     console.log('closing cloudcmd...');
     await Promise.all(promises);
+    threadIt.terminate();
     process.exit(0);
 });
 

server/user-menu.js

@@ -6,12 +6,17 @@ const fs = require('fs');
 const {join} = require('path');
 const {promisify} = require('util');
 
-const tryCatch = require('try-catch');
 const tryToCatch = require('try-to-catch');
 const currify = require('currify');
 const findUp = require('find-up');
-const putout = require('putout');
-const {codeframe} = putout;
+const threadIt = require('thread-it');
+const {codeframe} = require('putout');
+const putout = threadIt('putout');
+
+threadIt.init();
+
+// warm up worker cache
+transpile('');
 
 const readFile = promisify(fs.readFile);
 
@@ -62,12 +67,7 @@ async function onGET({req, res, menuName}) {
     if (e)
         return sendDefaultMenu(res);
     
-    const [parseError, result] = tryCatch(putout, source, {
-        plugins: [
-            'convert-esm-to-commonjs',
-            'strict-mode',
-        ],
-    });
+    const [parseError, result] = await transpile(source);
     
     if (parseError)
         return res
@@ -92,3 +92,11 @@ function sendDefaultMenu(res) {
     });
 }
 
+function transpile(source) {
+    return tryToCatch(putout, source, {
+        plugins: [
+            'convert-esm-to-commonjs',
+            'strict-mode',
+        ],
+    });
+}

server/user-menu.spec.js

@@ -5,6 +5,7 @@ const {join} = require('path');
 
 const test = require('supertape');
 const serveOnce = require('serve-once');
+const threadIt = require('thread-it');
 
 const userMenu = require('./user-menu');
 const {request} = serveOnce(userMenu);
@@ -21,6 +22,8 @@ test('cloudcmd: user menu', async (t) => {
         options,
     });
     
+    threadIt.terminate();
+    
     t.equal(userMenuFile, body, 'should equal');
     t.end();
 });