add benchmark

[skip ci]

benchmark/crypto/oneshot-sign-verify.js

@@ -0,0 +1,51 @@
+'use strict';
+
+const common = require('../common.js');
+const crypto = require('crypto');
+const fs = require('fs');
+const path = require('path');
+const fixtures_keydir = path.resolve(__dirname, '../../test/fixtures/keys/');
+const keys = {
+  publicKey: crypto.createPublicKey(
+    fs.readFileSync(`${fixtures_keydir}/ed25519_public.pem`)),
+  privateKey: crypto.createPrivateKey(
+    fs.readFileSync(`${fixtures_keydir}/ed25519_private.pem`)),
+};
+
+const data = crypto.randomBytes(256);
+const args = [null, data];
+
+const bench = common.createBenchmark(main, {
+  sync: [0, 1],
+  n: [1e4],
+});
+
+function measureSync(n) {
+  bench.start();
+  for (let i = 0; i < n; ++i) {
+    crypto.verify(...args, keys.publicKey,
+                  crypto.sign(...args, keys.privateKey));
+  }
+  bench.end(n);
+}
+
+function measureAsync(n) {
+  let remaining = n;
+  function done() {
+    if (--remaining === 0)
+      bench.end(n);
+  }
+  bench.start();
+  for (let i = 0; i < n; ++i) {
+    crypto.sign(...args, keys.privateKey, (err, signature) => {
+      crypto.verify(...args, keys.publicKey, signature, done);
+    });
+  }
+}
+
+function main({ n, sync }) {
+  if (sync)
+    measureSync(n);
+  else
+    measureAsync(n);
+}