diff --git a/devel/bench.c b/devel/bench.c
new file mode 100644
index 0000000..2e5ad2a
--- /dev/null
+++ b/devel/bench.c
@@ -0,0 +1,87 @@
+/* darkhttpd benchmark.
+ * https://unix4lyfe.org/darkhttpd/
+ * Copyright (c) 2018 Emil Mikulic <emikulic@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/socket.h>
+#include <sys/types.h>
+
+#include <arpa/inet.h>
+#include <err.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+
+static const char req[] = "GET /../ HTTP/1.0\r\n\r\n";
+static const int req_len = sizeof(req) - 1;
+
+int main(int argc, char **argv) {
+  int fd;
+  const char *host = "127.0.0.1";
+  int port = 8080;
+  struct sockaddr_in addrin;
+  char buf[2096];
+  ssize_t rcvd, sent;
+  struct timespec t0, t1;
+  int every = 10;
+  int count = 0;
+
+  addrin.sin_family = AF_INET;
+  addrin.sin_port = htons(port);
+  if (inet_aton(host, &addrin.sin_addr) == 0) err(1, "inet_aton");
+
+  clock_gettime(CLOCK_MONOTONIC, &t0);
+  while (1) {
+    fd = socket(AF_INET, SOCK_STREAM, 0);
+    if (fd == -1) err(1, "socket");
+
+    if (connect(fd, (const struct sockaddr *)&addrin,
+                sizeof(struct sockaddr)) == -1)
+      err(1, "connect");
+
+    sent = send(fd, req, req_len, 0);
+    if (sent != req_len) err(1, "send");
+    rcvd = recv(fd, buf, sizeof(buf), 0);
+    if (rcvd == -1) err(1, "recv");
+    if (rcvd == 0) errx(1, "eof");
+    if (rcvd == sizeof(buf)) errx(1, "long response");
+    close(fd);
+
+    count++;
+    if (count >= every) {
+      double dt;
+      double qps;
+
+      clock_gettime(CLOCK_MONOTONIC, &t1);
+      dt = t1.tv_sec - t0.tv_sec;
+      dt += (double)(t1.tv_nsec - t0.tv_nsec) / 1e9;
+      qps = count / dt;
+      printf("%f qps\n", qps);
+      fflush(stdout);
+
+      every = (every / 2) + (int)(qps / 2);
+      t0 = t1;
+      count = 0;
+    }
+  }
+
+  return 0;
+}
+
+/* vim:set ts=2 sw=2 sts=2 expandtab tw=80: */