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benchmark/buffers/buffer-compare-offset.js

@@ -0,0 +1,28 @@
+'use strict';
+const common = require('../common.js');
+
+const bench = common.createBenchmark(main, {
+  method: ['offset', 'slice'],
+  size: [16, 512, 4096, 16386],
+  n: [1e6],
+});
+
+function compareUsingSlice(b0, b1, len, iter) {
+  for (let i = 0; i < iter; i++)
+    Buffer.compare(b0.slice(1, len), b1.slice(1, len));
+}
+
+function compareUsingOffset(b0, b1, len, iter) {
+  for (let i = 0; i < iter; i++)
+    b0.compare(b1, 1, len, 1, len);
+}
+
+function main({ n, size, method }) {
+  const fn = method === 'slice' ? compareUsingSlice : compareUsingOffset;
+  bench.start();
+  fn(Buffer.alloc(size, 'a'),
+     Buffer.alloc(size, 'b'),
+     size >> 1,
+     n);
+  bench.end(n);
+}