--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/benchmark-pound.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,351 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "task.h"
+#include "uv.h"
+
+/* Update this is you're going to run > 1000 concurrent requests. */
+#define MAX_CONNS 1000
+
+#undef NANOSEC
+#define NANOSEC ((uint64_t) 1e9)
+
+#undef DEBUG
+#define DEBUG 0
+
+struct conn_rec_s;
+
+typedef void (*setup_fn)(int num, void* arg);
+typedef void (*make_connect_fn)(struct conn_rec_s* conn);
+typedef int (*connect_fn)(int num, make_connect_fn make_connect, void* arg);
+
+/* Base class for tcp_conn_rec and pipe_conn_rec.
+ * The ordering of fields matters!
+ */
+typedef struct conn_rec_s {
+  int i;
+  uv_connect_t conn_req;
+  uv_write_t write_req;
+  make_connect_fn make_connect;
+  uv_stream_t stream;
+} conn_rec;
+
+typedef struct {
+  int i;
+  uv_connect_t conn_req;
+  uv_write_t write_req;
+  make_connect_fn make_connect;
+  uv_tcp_t stream;
+} tcp_conn_rec;
+
+typedef struct {
+  int i;
+  uv_connect_t conn_req;
+  uv_write_t write_req;
+  make_connect_fn make_connect;
+  uv_pipe_t stream;
+} pipe_conn_rec;
+
+static char buffer[] = "QS";
+
+static uv_loop_t* loop;
+
+static tcp_conn_rec tcp_conns[MAX_CONNS];
+static pipe_conn_rec pipe_conns[MAX_CONNS];
+
+static uint64_t start; /* in ms  */
+static int closed_streams;
+static int conns_failed;
+
+static void alloc_cb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf);
+static void connect_cb(uv_connect_t* conn_req, int status);
+static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf);
+static void close_cb(uv_handle_t* handle);
+
+
+static void alloc_cb(uv_handle_t* handle,
+                     size_t suggested_size,
+                     uv_buf_t* buf) {
+  static char slab[65536];
+  buf->base = slab;
+  buf->len = sizeof(slab);
+}
+
+
+static void after_write(uv_write_t* req, int status) {
+  if (status != 0) {
+    fprintf(stderr, "write error %s\n", uv_err_name(status));
+    uv_close((uv_handle_t*)req->handle, close_cb);
+    conns_failed++;
+    return;
+  }
+}
+
+
+static void connect_cb(uv_connect_t* req, int status) {
+  conn_rec* conn;
+  uv_buf_t buf;
+  int r;
+
+  if (status != 0) {
+#if DEBUG
+    fprintf(stderr, "connect error %s\n", uv_err_name(status));
+#endif
+    uv_close((uv_handle_t*)req->handle, close_cb);
+    conns_failed++;
+    return;
+  }
+
+  ASSERT_NOT_NULL(req);
+  ASSERT_OK(status);
+
+  conn = (conn_rec*)req->data;
+  ASSERT_NOT_NULL(conn);
+
+#if DEBUG
+  printf("connect_cb %d\n", conn->i);
+#endif
+
+  r = uv_read_start(&conn->stream, alloc_cb, read_cb);
+  ASSERT_OK(r);
+
+  buf.base = buffer;
+  buf.len = sizeof(buffer) - 1;
+
+  r = uv_write(&conn->write_req, &conn->stream, &buf, 1, after_write);
+  ASSERT_OK(r);
+}
+
+
+static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
+
+  ASSERT_NOT_NULL(stream);
+
+#if DEBUG
+  printf("read_cb %d\n", p->i);
+#endif
+
+  uv_close((uv_handle_t*)stream, close_cb);
+
+  if (nread < 0) {
+    if (nread == UV_EOF) {
+      ;
+    } else if (nread == UV_ECONNRESET) {
+      conns_failed++;
+    } else {
+      fprintf(stderr, "read error %s\n", uv_err_name(nread));
+      ASSERT(0);
+    }
+  }
+}
+
+
+static void close_cb(uv_handle_t* handle) {
+  conn_rec* p = (conn_rec*)handle->data;
+
+  ASSERT_NOT_NULL(handle);
+  closed_streams++;
+
+#if DEBUG
+  printf("close_cb %d\n", p->i);
+#endif
+
+  if (uv_now(loop) - start < 10000) {
+    p->make_connect(p);
+  }
+}
+
+
+static void tcp_do_setup(int num, void* arg) {
+  int i;
+
+  for (i = 0; i < num; i++) {
+    tcp_conns[i].i = i;
+  }
+}
+
+
+static void pipe_do_setup(int num, void* arg) {
+  int i;
+
+  for (i = 0; i < num; i++) {
+    pipe_conns[i].i = i;
+  }
+}
+
+
+static void tcp_make_connect(conn_rec* p) {
+  struct sockaddr_in addr;
+  tcp_conn_rec* tp;
+  int r;
+
+  tp = (tcp_conn_rec*) p;
+
+  r = uv_tcp_init(loop, (uv_tcp_t*)&p->stream);
+  ASSERT_OK(r);
+
+  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+
+  r = uv_tcp_connect(&tp->conn_req,
+                     (uv_tcp_t*) &p->stream,
+                     (const struct sockaddr*) &addr,
+                     connect_cb);
+  if (r) {
+    fprintf(stderr, "uv_tcp_connect error %s\n", uv_err_name(r));
+    ASSERT(0);
+  }
+
+#if DEBUG
+  printf("make connect %d\n", p->i);
+#endif
+
+  p->conn_req.data = p;
+  p->write_req.data = p;
+  p->stream.data = p;
+}
+
+
+static void pipe_make_connect(conn_rec* p) {
+  int r;
+
+  r = uv_pipe_init(loop, (uv_pipe_t*)&p->stream, 0);
+  ASSERT_OK(r);
+
+  uv_pipe_connect(&((pipe_conn_rec*) p)->conn_req,
+                  (uv_pipe_t*) &p->stream,
+                  TEST_PIPENAME,
+                  connect_cb);
+
+#if DEBUG
+  printf("make connect %d\n", p->i);
+#endif
+
+  p->conn_req.data = p;
+  p->write_req.data = p;
+  p->stream.data = p;
+}
+
+
+static int tcp_do_connect(int num, make_connect_fn make_connect, void* arg) {
+  int i;
+
+  for (i = 0; i < num; i++) {
+    tcp_make_connect((conn_rec*)&tcp_conns[i]);
+    tcp_conns[i].make_connect = make_connect;
+  }
+
+  return 0;
+}
+
+
+static int pipe_do_connect(int num, make_connect_fn make_connect, void* arg) {
+  int i;
+
+  for (i = 0; i < num; i++) {
+    pipe_make_connect((conn_rec*)&pipe_conns[i]);
+    pipe_conns[i].make_connect = make_connect;
+  }
+
+  return 0;
+}
+
+
+static int pound_it(int concurrency,
+                    const char* type,
+                    setup_fn do_setup,
+                    connect_fn do_connect,
+                    make_connect_fn make_connect,
+                    void* arg) {
+  double secs;
+  int r;
+  uint64_t start_time; /* in ns */
+  uint64_t end_time;
+
+  loop = uv_default_loop();
+
+  uv_update_time(loop);
+  start = uv_now(loop);
+
+  /* Run benchmark for at least five seconds. */
+  start_time = uv_hrtime();
+
+  do_setup(concurrency, arg);
+
+  r = do_connect(concurrency, make_connect, arg);
+  ASSERT(!r);
+
+  uv_run(loop, UV_RUN_DEFAULT);
+
+  end_time = uv_hrtime();
+
+  /* Number of fractional seconds it took to run the benchmark. */
+  secs = (double)(end_time - start_time) / NANOSEC;
+
+  fprintf(stderr, "%s-conn-pound-%d: %.0f accepts/s (%d failed)\n",
+          type,
+          concurrency,
+          closed_streams / secs,
+          conns_failed);
+  fflush(stderr);
+
+  MAKE_VALGRIND_HAPPY(loop);
+  return 0;
+}
+
+
+BENCHMARK_IMPL(tcp4_pound_100) {
+  return pound_it(100,
+                  "tcp",
+                  tcp_do_setup,
+                  tcp_do_connect,
+                  tcp_make_connect,
+                  NULL);
+}
+
+
+BENCHMARK_IMPL(tcp4_pound_1000) {
+  return pound_it(1000,
+                  "tcp",
+                  tcp_do_setup,
+                  tcp_do_connect,
+                  tcp_make_connect,
+                  NULL);
+}
+
+
+BENCHMARK_IMPL(pipe_pound_100) {
+  return pound_it(100,
+                  "pipe",
+                  pipe_do_setup,
+                  pipe_do_connect,
+                  pipe_make_connect,
+                  NULL);
+}
+
+
+BENCHMARK_IMPL(pipe_pound_1000) {
+  return pound_it(1000,
+                  "pipe",
+                  pipe_do_setup,
+                  pipe_do_connect,
+                  pipe_make_connect,
+                  NULL);
+}