fs: improve error performance for ftruncateSync

PR-URL: #50032
Refs: nodejs/performance#106
Reviewed-By: Yagiz Nizipli <[email protected]>

Author: andremralves

benchmark/fs/bench-ftruncateSync.js

@@ -0,0 +1,40 @@
+'use strict';
+
+const common = require('../common');
+const fs = require('fs');
+const tmpdir = require('../../test/common/tmpdir');
+tmpdir.refresh();
+
+const path = tmpdir.resolve(`new-file-${process.pid}`);
+fs.appendFileSync(path, 'Some content.');
+
+const bench = common.createBenchmark(main, {
+  type: ['invalid', 'valid'],
+  n: [1e4],
+});
+
+function main({ n, type }) {
+  let fd;
+
+  switch (type) {
+    case 'invalid':
+      fd = 1 << 30;
+      break;
+    case 'valid':
+      fd = fs.openSync(path, 'r+');
+      break;
+    default:
+      throw new Error('Invalid type');
+  }
+
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    try {
+      fs.ftruncateSync(fd, 4);
+    } catch {
+      // do nothing
+    }
+  }
+  bench.end(n);
+  if (type === 'valid') fs.closeSync(fd);
+}

lib/fs.js

@@ -1138,9 +1138,7 @@ function ftruncateSync(fd, len = 0) {
   fd = getValidatedFd(fd);
   validateInteger(len, 'len');
   len = MathMax(0, len);
-  const ctx = {};
-  binding.ftruncate(fd, len, undefined, ctx);
-  handleErrorFromBinding(ctx);
+  binding.ftruncate(fd, len);
 }
 
 function lazyLoadCp() {

src/node_file.cc

@@ -1474,25 +1474,23 @@ static void FTruncate(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
 
   const int argc = args.Length();
-  CHECK_GE(argc, 3);
+  CHECK_GE(argc, 2);
 
   CHECK(args[0]->IsInt32());
   const int fd = args[0].As<Int32>()->Value();
 
   CHECK(IsSafeJsInt(args[1]));
   const int64_t len = args[1].As<Integer>()->Value();
 
-  FSReqBase* req_wrap_async = GetReqWrap(args, 2);
-  if (req_wrap_async != nullptr) {
+  if (argc > 2) {
+    FSReqBase* req_wrap_async = GetReqWrap(args, 2);
     FS_ASYNC_TRACE_BEGIN0(UV_FS_FTRUNCATE, req_wrap_async)
     AsyncCall(env, req_wrap_async, args, "ftruncate", UTF8, AfterNoArgs,
               uv_fs_ftruncate, fd, len);
   } else {
-    CHECK_EQ(argc, 4);
-    FSReqWrapSync req_wrap_sync;
+    FSReqWrapSync req_wrap_sync("ftruncate");
     FS_SYNC_TRACE_BEGIN(ftruncate);
-    SyncCall(env, args[3], &req_wrap_sync, "ftruncate", uv_fs_ftruncate, fd,
-             len);
+    SyncCallAndThrowOnError(env, &req_wrap_sync, uv_fs_ftruncate, fd, len);
     FS_SYNC_TRACE_END(ftruncate);
   }
 }