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benchmark/buffers/buffer-bytelength-buffer.js

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+'use strict';
+const common = require('../common');
+
+const bench = common.createBenchmark(main, {
+  len: [2, 16, 256], // x16
+  n: [4e6],
+});
+
+function main({ n, len }) {
+  const data = Buffer.alloc(len * 16, 'a');
+  const expected = Buffer.byteLength(data, 'buffer');
+  let changed = false;
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    const actual = Buffer.byteLength(data, 'buffer');
+    if (expected !== actual) { changed = true; }
+  }
+  bench.end(n);
+  if (changed) {
+    throw new Error('Result changed during iteration');
+  }
+}