benchmark: add benchmark for node -p

PR-URL: https://github.com/nodejs/node/pull/27320
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/benchmark/misc/print.js b/benchmark/misc/print.js
new file mode 100644
index 0000000000..e048d22f7b
--- /dev/null
+++ b/benchmark/misc/print.js
@@ -0,0 +1,59 @@
+'use strict';
+const common = require('../common.js');
+const { spawn } = require('child_process');
+
+const bench = common.createBenchmark(main, {
+  dur: [1],
+  code: ['1', '"string"', 'process.versions', 'process']
+});
+
+function spawnProcess(code) {
+  const cmd = process.execPath || process.argv[0];
+  const argv = ['-p', code];
+  return spawn(cmd, argv);
+}
+
+function start(state, code, bench, getNode) {
+  const node = getNode(code);
+  let stdout = '';
+  let stderr = '';
+
+  node.stdout.on('data', (data) => {
+    stdout += data;
+  });
+
+  node.stderr.on('data', (data) => {
+    stderr += data;
+  });
+
+  node.on('exit', (code) => {
+    if (code !== 0) {
+      console.error('------ stdout ------');
+      console.error(stdout);
+      console.error('------ stderr ------');
+      console.error(stderr);
+      throw new Error(`Error during node startup, exit code ${code}`);
+    }
+    state.throughput++;
+
+    if (state.go) {
+      start(state, code, bench, getNode);
+    } else {
+      bench.end(state.throughput);
+    }
+  });
+}
+
+function main({ dur, code }) {
+  const state = {
+    go: true,
+    throughput: 0
+  };
+
+  setTimeout(() => {
+    state.go = false;
+  }, dur * 1000);
+
+  bench.start();
+  start(state, code, bench, spawnProcess);
+}