From 969ec5d7cdffaf86b956c2dfe9e1b25847b0a61b Mon Sep 17 00:00:00 2001
From: 18alantom <2.alan.tom@gmail.com>
Date: Fri, 20 May 2022 13:10:21 +0530
Subject: [PATCH] chore: simple script to create profile log

---
 backend/database/manager.ts | 14 +++++++-------
 scripts/profile.sh          | 15 +++++++++++++++
 scripts/profile.ts          | 22 ++++++++++++++++++++++
 3 files changed, 44 insertions(+), 7 deletions(-)
 create mode 100755 scripts/profile.sh
 create mode 100644 scripts/profile.ts

diff --git a/backend/database/manager.ts b/backend/database/manager.ts
index 2555a99a..772ec8a1 100644
--- a/backend/database/manager.ts
+++ b/backend/database/manager.ts
@@ -1,3 +1,4 @@
+import { constants } from 'fs';
 import fs from 'fs/promises';
 import { DatabaseDemuxBase, DatabaseMethod } from 'utils/db/types';
 import { getSchemas } from '../../schemas';
@@ -105,14 +106,13 @@ export class DatabaseManager extends DatabaseDemuxBase {
   }
 
   async #unlinkIfExists(dbPath: string) {
-    try {
-      fs.unlink(dbPath);
-    } catch (err) {
-      if ((err as NodeJS.ErrnoException).code === 'ENOENT') {
-        return;
-      }
+    const exists = await fs
+      .access(dbPath, constants.W_OK)
+      .then(() => true)
+      .catch(() => false);
 
-      throw err;
+    if (exists) {
+      fs.unlink(dbPath);
     }
   }
 
diff --git a/scripts/profile.sh b/scripts/profile.sh
new file mode 100755
index 00000000..78f7fe6d
--- /dev/null
+++ b/scripts/profile.sh
@@ -0,0 +1,15 @@
+#! /bin/sh
+
+# https://nodejs.org/en/docs/guides/simple-profiling/
+
+export TS_NODE_COMPILER_OPTIONS='{"module":"commonjs"}'
+
+rm ./isolate-*-v8.log 2> /dev/null
+rm ./profiler-output.log 2> /dev/null
+
+echo "running profile.ts"
+node --require ts-node/register --require tsconfig-paths/register --prof ./scripts/profile.ts
+
+echo "processing tick file"
+node --prof-process ./isolate-*-v8.log > ./profiler-output.log && echo "generated profiler-output.log"
+rm ./isolate-*-v8.log
\ No newline at end of file
diff --git a/scripts/profile.ts b/scripts/profile.ts
new file mode 100644
index 00000000..34c4557e
--- /dev/null
+++ b/scripts/profile.ts
@@ -0,0 +1,22 @@
+import { DatabaseManager } from 'backend/database/manager';
+import { setupDummyInstance } from 'dummy';
+import { unlink } from 'fs/promises';
+import { Fyo } from 'fyo';
+import { DummyAuthDemux } from 'fyo/tests/helpers';
+import { getTestDbPath } from 'tests/helpers';
+
+async function run() {
+  const fyo = new Fyo({
+    DatabaseDemux: DatabaseManager,
+    AuthDemux: DummyAuthDemux,
+    isTest: true,
+    isElectron: false,
+  });
+  const dbPath = getTestDbPath();
+
+  await setupDummyInstance(dbPath, fyo, 1, 100);
+  await fyo.close();
+  await unlink(dbPath);
+}
+
+run();