fs: improve error performance for fdatasyncSync

PR-URL: #49898
Refs: nodejs/performance#106
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>

Author: Jungku Lee

benchmark/fs/bench_fdatasyncSync.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.fdatasyncSync(fd);
+    } catch {
+      // do nothing
+    }
+  }
+
+  bench.end(n);
+
+  if (type === 'existing') fs.closeSync(fd);
+}

lib/fs.js

@@ -1305,9 +1305,7 @@ function fdatasync(fd, callback) {
  */
 function fdatasyncSync(fd) {
   fd = getValidatedFd(fd);
-  const ctx = {};
-  binding.fdatasync(fd, undefined, ctx);
-  handleErrorFromBinding(ctx);
+  return binding.fdatasync(fd);
 }
 
 /**

src/node_file.cc

@@ -1501,21 +1501,21 @@ static void Fdatasync(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) {  // fdatasync(fd, req)
+    FSReqBase* req_wrap_async = GetReqWrap(args, 1);
+    CHECK_NOT_NULL(req_wrap_async);
     FS_ASYNC_TRACE_BEGIN0(UV_FS_FDATASYNC, req_wrap_async)
     AsyncCall(env, req_wrap_async, args, "fdatasync", UTF8, AfterNoArgs,
               uv_fs_fdatasync, fd);
-  } else {
-    CHECK_EQ(argc, 3);
-    FSReqWrapSync req_wrap_sync;
+  } else {  // fdatasync(fd)
+    FSReqWrapSync req_wrap_sync("fdatasync");
     FS_SYNC_TRACE_BEGIN(fdatasync);
-    SyncCall(env, args[2], &req_wrap_sync, "fdatasync", uv_fs_fdatasync, fd);
+    SyncCallAndThrowOnError(env, &req_wrap_sync, uv_fs_fdatasync, fd);
     FS_SYNC_TRACE_END(fdatasync);
   }
 }

typings/internalBinding/fs.d.ts

@@ -86,6 +86,7 @@ declare namespace InternalFSBinding {
   function fdatasync(fd: number, req: FSReqCallback): void;
   function fdatasync(fd: number, req: undefined, ctx: FSSyncContext): void;
   function fdatasync(fd: number, usePromises: typeof kUsePromises): Promise<void>;
+  function fdatasync(fd: number): void;
 
   function fstat(fd: number, useBigint: boolean, req: FSReqCallback<Float64Array | BigUint64Array>): void;
   function fstat(fd: number, useBigint: true, req: FSReqCallback<BigUint64Array>): void;