benchmark: fix destructuring in dgram/single-buffer

PR #59872 renamed the config key from `num` to `n` but did not update
the destructuring in main(), leaving `{ num: n }` which resolves to
undefined. This caused the benchmark to produce near-zero throughput
since the send-batching logic never fires when n is undefined.

Refs: #59872
PR-URL: #62084
Refs: nodejs/performance#187
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: thisalihassan

benchmark/crypto/hash-stream-creation.js

@@ -5,15 +5,15 @@ const common = require('../common.js');
 const crypto = require('crypto');
 
 const bench = common.createBenchmark(main, {
-  writes: [500],
+  n: [500],
   algo: [ 'sha256', 'md5' ],
   type: ['asc', 'utf', 'buf'],
   out: ['hex', 'binary', 'buffer'],
   len: [2, 1024, 102400, 1024 * 1024],
   api: ['legacy', 'stream'],
 });
 
-function main({ api, type, len, out, writes, algo }) {
+function main({ api, type, len, out, n, algo }) {
   if (api === 'stream' && /^v0\.[0-8]\./.test(process.version)) {
     console.error('Crypto streams not available until v0.10');
     // Use the legacy, just so that we can compare them.
@@ -41,15 +41,15 @@ function main({ api, type, len, out, writes, algo }) {
   const fn = api === 'stream' ? streamWrite : legacyWrite;
 
   bench.start();
-  fn(algo, message, encoding, writes, len, out);
+  fn(algo, message, encoding, n, len, out);
 }
 
-function legacyWrite(algo, message, encoding, writes, len, outEnc) {
-  const written = writes * len;
+function legacyWrite(algo, message, encoding, n, len, outEnc) {
+  const written = n * len;
   const bits = written * 8;
   const gbits = bits / (1024 * 1024 * 1024);
 
-  while (writes-- > 0) {
+  while (n-- > 0) {
     const h = crypto.createHash(algo);
     h.update(message, encoding);
     h.digest(outEnc);
@@ -58,12 +58,12 @@ function legacyWrite(algo, message, encoding, writes, len, outEnc) {
   bench.end(gbits);
 }
 
-function streamWrite(algo, message, encoding, writes, len, outEnc) {
-  const written = writes * len;
+function streamWrite(algo, message, encoding, n, len, outEnc) {
+  const written = n * len;
   const bits = written * 8;
   const gbits = bits / (1024 * 1024 * 1024);
 
-  while (writes-- > 0) {
+  while (n-- > 0) {
     const h = crypto.createHash(algo);
 
     if (outEnc !== 'buffer')

benchmark/crypto/hash-stream-throughput.js

@@ -5,14 +5,14 @@ const common = require('../common.js');
 const crypto = require('crypto');
 
 const bench = common.createBenchmark(main, {
-  writes: [500],
+  n: [500],
   algo: ['sha1', 'sha256', 'sha512'],
   type: ['asc', 'utf', 'buf'],
   len: [2, 1024, 102400, 1024 * 1024],
   api: ['legacy', 'stream'],
 });
 
-function main({ api, type, len, algo, writes }) {
+function main({ api, type, len, algo, n }) {
   if (api === 'stream' && /^v0\.[0-8]\./.test(process.version)) {
     console.error('Crypto streams not available until v0.10');
     // Use the legacy, just so that we can compare them.
@@ -40,30 +40,30 @@ function main({ api, type, len, algo, writes }) {
   const fn = api === 'stream' ? streamWrite : legacyWrite;
 
   bench.start();
-  fn(algo, message, encoding, writes, len);
+  fn(algo, message, encoding, n, len);
 }
 
-function legacyWrite(algo, message, encoding, writes, len) {
-  const written = writes * len;
+function legacyWrite(algo, message, encoding, n, len) {
+  const written = n * len;
   const bits = written * 8;
   const gbits = bits / (1024 * 1024 * 1024);
   const h = crypto.createHash(algo);
 
-  while (writes-- > 0)
+  while (n-- > 0)
     h.update(message, encoding);
 
   h.digest();
 
   bench.end(gbits);
 }
 
-function streamWrite(algo, message, encoding, writes, len) {
-  const written = writes * len;
+function streamWrite(algo, message, encoding, n, len) {
+  const written = n * len;
   const bits = written * 8;
   const gbits = bits / (1024 * 1024 * 1024);
   const h = crypto.createHash(algo);
 
-  while (writes-- > 0)
+  while (n-- > 0)
     h.write(message, encoding);
 
   h.end();

benchmark/crypto/rsa-sign-verify-throughput.js

@@ -17,28 +17,28 @@ keylen_list.forEach((key) => {
 });
 
 const bench = common.createBenchmark(main, {
-  writes: [500],
+  n: [500],
   algo: ['SHA1', 'SHA224', 'SHA256', 'SHA384', 'SHA512'],
   keylen: keylen_list,
   len: [1024, 102400, 2 * 102400, 3 * 102400, 1024 * 1024],
 });
 
-function main({ len, algo, keylen, writes }) {
+function main({ len, algo, keylen, n }) {
   const message = Buffer.alloc(len, 'b');
   bench.start();
-  StreamWrite(algo, keylen, message, writes, len);
+  StreamWrite(algo, keylen, message, n, len);
 }
 
-function StreamWrite(algo, keylen, message, writes, len) {
-  const written = writes * len;
+function StreamWrite(algo, keylen, message, n, len) {
+  const written = n * len;
   const bits = written * 8;
   const kbits = bits / (1024);
 
   const privateKey = RSA_PrivatePem[keylen];
   const s = crypto.createSign(algo);
   const v = crypto.createVerify(algo);
 
-  while (writes-- > 0) {
+  while (n-- > 0) {
     s.update(message);
     v.update(message);
   }

benchmark/dgram/single-buffer.js

@@ -5,7 +5,7 @@ const common = require('../common.js');
 const dgram = require('dgram');
 const PORT = common.PORT;
 
-// `num` is the number of send requests to queue up each time.
+// `n` is the number of send requests to queue up each time.
 // Keep it reasonably high (>10) otherwise you're benchmarking the speed of
 // event loop cycles more than anything else.
 const bench = common.createBenchmark(main, {
@@ -15,7 +15,7 @@ const bench = common.createBenchmark(main, {
   dur: [5],
 });
 
-function main({ dur, len, num: n, type }) {
+function main({ dur, len, n, type }) {
   const chunk = Buffer.allocUnsafe(len);
   let sent = 0;
   let received = 0;