chore: remove unneeded code; add throughput example

example/throughput.c

@@ -0,0 +1,53 @@
+#include "lnm/http/res.h"
+#include "lnm/log.h"
+#include "lnm/http/loop.h"
+#include "lnm/loop.h"
+
+lnm_err ctx_init(void **c_ctx, void *gctx) {
+  *c_ctx = NULL;
+
+  return lnm_err_ok;
+}
+
+void ctx_reset(void *c_ctx) {}
+void ctx_free(void *c_ctx) {}
+
+lnm_err data_streamer(uint64_t *written, char *buf,
+                                   lnm_http_conn *conn, uint64_t offset,
+                                   uint64_t len) {
+  // Don't do anything, just let the application return random data stored in
+  // the read buffer. The goal is to benchmark the networking pipeline
+  *written = len;
+
+  return lnm_err_ok;
+}
+
+lnm_http_step_err step_fn(lnm_http_conn *conn) {
+  lnm_http_loop_ctx *ctx = conn->ctx;
+  uint64_t len = 1 << 30;
+  lnm_http_res_body_set_fn(&ctx->res, data_streamer, len);
+
+  return lnm_http_step_err_done;
+}
+
+int main() {
+  lnm_http_loop *hl;
+
+  lnm_http_loop_init(&hl, NULL, ctx_init,
+                     ctx_reset,
+                     ctx_free);
+
+  lnm_http_router *router;
+  lnm_http_router_init(&router);
+
+  lnm_http_route *route;
+  lnm_http_router_add(&route, router, lnm_http_method_get, "/");
+  lnm_http_route_step_append(route, step_fn, false);
+
+  lnm_http_loop_router_set(hl, router);
+
+  lnm_log_init_global();
+  lnm_log_register_stdout(lnm_log_level_warning);
+
+  printf("res = %i\n", lnm_http_loop_run(hl, 8080, 1, 0));
+}