fs: improve error performance for fsyncSync

benchmark/fs/bench-fsyncSync.js

@@ -0,0 +1,42 @@
+'use strict';
+
+const common = require('../common');
+const fs = require('fs');
+const tmpdir = require('../../test/common/tmpdir');
+tmpdir.refresh();
+
+const tmpfile = tmpdir.resolve(`.existing-file-${process.pid}`);
+fs.writeFileSync(tmpfile, 'this-is-for-a-benchmark', 'utf8');
+
+const bench = common.createBenchmark(main, {
+  type: ['existing', 'non-existing'],
+  n: [1e4],
+});
+
+function main({ n, type }) {
+  let fd;
+
+  switch (type) {
+    case 'existing':
+      fd = fs.openSync(tmpfile, 'r', 0o666);
+      break;
+    case 'non-existing':
+      fd = 1 << 30;
+      break;
+    default:
+      new Error('Invalid type');
+  }
+
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    try {
+      fs.fsyncSync(fd);
+    } catch {
+      // do nothing
+    }
+  }
+
+  bench.end(n);
+
+  if (type === 'existing') fs.closeSync(fd);
+}

lib/fs.js

@@ -1331,9 +1331,7 @@ function fsync(fd, callback) {
  */
 function fsyncSync(fd) {
   fd = getValidatedFd(fd);
-  const ctx = {};
-  binding.fsync(fd, undefined, ctx);
-  handleErrorFromBinding(ctx);
+  return binding.fsync(fd);
 }
 
 /**

src/node_file.cc

@@ -1524,21 +1524,21 @@ static void Fsync(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
 
   const int argc = args.Length();
-  CHECK_GE(argc, 2);
+  CHECK_GE(argc, 1);
 
   CHECK(args[0]->IsInt32());
   const int fd = args[0].As<Int32>()->Value();
 
-  FSReqBase* req_wrap_async = GetReqWrap(args, 1);
-  if (req_wrap_async != nullptr) {
+  if (argc > 1) {
+    FSReqBase* req_wrap_async = GetReqWrap(args, 1);
+    CHECK_NOT_NULL(req_wrap_async);
     FS_ASYNC_TRACE_BEGIN0(UV_FS_FSYNC, req_wrap_async)
     AsyncCall(env, req_wrap_async, args, "fsync", UTF8, AfterNoArgs,
               uv_fs_fsync, fd);
   } else {
-    CHECK_EQ(argc, 3);
-    FSReqWrapSync req_wrap_sync;
+    FSReqWrapSync req_wrap_sync("fsync");
     FS_SYNC_TRACE_BEGIN(fsync);
-    SyncCall(env, args[2], &req_wrap_sync, "fsync", uv_fs_fsync, fd);
+    SyncCallAndThrowOnError(env, &req_wrap_sync, uv_fs_fsync, fd);
     FS_SYNC_TRACE_END(fsync);
   }
 }

typings/internalBinding/fs.d.ts

@@ -98,6 +98,7 @@ declare namespace InternalFSBinding {
   function fsync(fd: number, req: FSReqCallback): void;
   function fsync(fd: number, req: undefined, ctx: FSSyncContext): void;
   function fsync(fd: number, usePromises: typeof kUsePromises): Promise<void>;
+  function fsync(fd: number): void;
 
   function ftruncate(fd: number, len: number, req: FSReqCallback): void;
   function ftruncate(fd: number, len: number, req: undefined, ctx: FSSyncContext): void;