stream: fixup stream/iter FileHandle benchmarks

Author: jasnell

benchmark/fs/bench-filehandle-pipetosync.js

@@ -1,11 +1,10 @@
-// Flags: --experimental-stream-iter
 // Benchmark: pipeToSync with sync compression transforms.
 // Measures fully synchronous file-to-file pipeline (no threadpool, no promises).
 'use strict';
 
 const common = require('../common.js');
 const fs = require('fs');
-const { openSync, closeSync, writeSync, readFileSync, unlinkSync } = fs;
+const { openSync, closeSync, writeSync, unlinkSync } = fs;
 
 const tmpdir = require('../../test/common/tmpdir');
 tmpdir.refresh();
@@ -16,6 +15,8 @@ const bench = common.createBenchmark(main, {
   compression: ['gzip', 'deflate', 'brotli', 'zstd'],
   filesize: [1024 * 1024, 16 * 1024 * 1024, 64 * 1024 * 1024],
   n: [5],
+}, {
+  flags: ['--experimental-stream-iter'],
 });
 
 function main({ compression, filesize, n }) {
@@ -93,9 +94,7 @@ function main({ compression, filesize, n }) {
 function runSync(srcFh, dstFh, upper, compressFactory, pipeToSync) {
   const w = dstFh.writer();
   pipeToSync(srcFh.pullSync(upper, compressFactory()), w);
-
-  // Read back compressed size
-  return readFileSync(dstFile).length;
+  return w.endSync();
 }
 
 function cleanup() {

benchmark/fs/bench-filehandle-pull-vs-webstream.js

@@ -1,4 +1,3 @@
-// Flags: --experimental-stream-iter
 // Compare FileHandle.createReadStream() vs readableWebStream() vs pull()
 // reading a large file through two transforms: uppercase then compress.
 'use strict';
@@ -18,6 +17,7 @@ const bench = common.createBenchmark(main, {
   filesize: [1024 * 1024, 16 * 1024 * 1024, 64 * 1024 * 1024],
   n: [5],
 }, {
+  flags: ['--experimental-stream-iter'],
   // Classic and webstream only support gzip (native zlib / CompressionStream).
   // Brotli, deflate, zstd are pull-only via stream/iter transforms.
   combinationFilter({ api, compression }) {