fs: improve error performance of chownSync

PR-URL: #49962
Refs: nodejs/performance#106
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Stephen Belanger <[email protected]>
Reviewed-By: Vinícius Lourenço Claro Cardoso <[email protected]>

Author: anonrig

benchmark/fs/bench-chownSync.js

@@ -0,0 +1,54 @@
+'use strict';
+
+const common = require('../common');
+const fs = require('fs');
+const assert = require('assert');
+const tmpdir = require('../../test/common/tmpdir');
+
+if (process.platform === 'win32') {
+  console.log('Skipping: Windows does not have `getuid` or `getgid`');
+  process.exit(0);
+}
+
+const bench = common.createBenchmark(main, {
+  type: ['existing', 'non-existing'],
+  method: ['chownSync', 'lchownSync'],
+  n: [1e4],
+});
+
+function main({ n, type, method }) {
+  const uid = process.getuid();
+  const gid = process.getgid();
+  const fsMethod = fs[method];
+
+  switch (type) {
+    case 'existing': {
+      tmpdir.refresh();
+      const tmpfile = tmpdir.resolve(`.existing-file-${process.pid}`);
+      fs.writeFileSync(tmpfile, 'this-is-for-a-benchmark', 'utf8');
+      bench.start();
+      for (let i = 0; i < n; i++) {
+        fsMethod(tmpfile, uid, gid);
+      }
+      bench.end(n);
+      break;
+    }
+    case 'non-existing': {
+      const path = tmpdir.resolve(`.non-existing-file-${Date.now()}`);
+      let hasError = false;
+      bench.start();
+      for (let i = 0; i < n; i++) {
+        try {
+          fs[method](path, uid, gid);
+        } catch {
+          hasError = true;
+        }
+      }
+      bench.end(n);
+      assert(hasError);
+      break;
+    }
+    default:
+      new Error('Invalid type');
+  }
+}

lib/fs.js

@@ -2087,9 +2087,11 @@ function chownSync(path, uid, gid) {
   path = getValidatedPath(path);
   validateInteger(uid, 'uid', -1, kMaxUserId);
   validateInteger(gid, 'gid', -1, kMaxUserId);
-  const ctx = { path };
-  binding.chown(pathModule.toNamespacedPath(path), uid, gid, undefined, ctx);
-  handleErrorFromBinding(ctx);
+  binding.chown(
+    pathModule.toNamespacedPath(path),
+    uid,
+    gid,
+  );
 }
 
 /**

src/node_file.cc

@@ -2607,18 +2607,16 @@ static void Chown(const FunctionCallbackInfo<Value>& args) {
   CHECK(IsSafeJsInt(args[2]));
   const uv_gid_t gid = static_cast<uv_gid_t>(args[2].As<Integer>()->Value());
 
-  FSReqBase* req_wrap_async = GetReqWrap(args, 3);
-  if (req_wrap_async != nullptr) {  // chown(path, uid, gid, req)
+  if (argc > 3) {  // chown(path, uid, gid, req)
+    FSReqBase* req_wrap_async = GetReqWrap(args, 3);
     FS_ASYNC_TRACE_BEGIN1(
         UV_FS_CHOWN, req_wrap_async, "path", TRACE_STR_COPY(*path))
     AsyncCall(env, req_wrap_async, args, "chown", UTF8, AfterNoArgs,
               uv_fs_chown, *path, uid, gid);
-  } else {  // chown(path, uid, gid, undefined, ctx)
-    CHECK_EQ(argc, 5);
-    FSReqWrapSync req_wrap_sync;
+  } else {  // chown(path, uid, gid)
+    FSReqWrapSync req_wrap_sync("chown", *path);
     FS_SYNC_TRACE_BEGIN(chown);
-    SyncCall(env, args[4], &req_wrap_sync, "chown",
-             uv_fs_chown, *path, uid, gid);
+    SyncCallAndThrowOnError(env, &req_wrap_sync, uv_fs_chown, *path, uid, gid);
     FS_SYNC_TRACE_END(chown);
   }
 }

typings/internalBinding/fs.d.ts

@@ -67,6 +67,7 @@ declare namespace InternalFSBinding {
   function chown(path: string, uid: number, gid: number, req: FSReqCallback): void;
   function chown(path: string, uid: number, gid: number, req: undefined, ctx: FSSyncContext): void;
   function chown(path: string, uid: number, gid: number, usePromises: typeof kUsePromises): Promise<void>;
+  function chown(path: string, uid: number, gid: number): void;
 
   function close(fd: number, req: FSReqCallback): void;
   function close(fd: number, req: undefined, ctx: FSSyncContext): void;