nodejs/deps/uv/test/benchmark-million-timers.c

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 *
 * The above copyright notice and this permission notice shall be included in
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#include "task.h"
#include "uv.h"

#define NUM_TIMERS (10 * 1000 * 1000)

static int timer_cb_called;
static int close_cb_called;


static void timer_cb(uv_timer_t* handle) {
  timer_cb_called++;
}


static void close_cb(uv_handle_t* handle) {
  close_cb_called++;
}


BENCHMARK_IMPL(million_timers) {
  uv_timer_t* timers;
  uv_loop_t* loop;
  uint64_t before_all;
  uint64_t before_run;
  uint64_t after_run;
  uint64_t after_all;
  int timeout;
  int i;

  timers = malloc(NUM_TIMERS * sizeof(timers[0]));
  ASSERT(timers != NULL);

  loop = uv_default_loop();
  timeout = 0;

  before_all = uv_hrtime();
  for (i = 0; i < NUM_TIMERS; i++) {
    if (i % 1000 == 0) timeout++;
    ASSERT(0 == uv_timer_init(loop, timers + i));
    ASSERT(0 == uv_timer_start(timers + i, timer_cb, timeout, 0));
  }

  before_run = uv_hrtime();
  ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));
  after_run = uv_hrtime();

  for (i = 0; i < NUM_TIMERS; i++)
    uv_close((uv_handle_t*) (timers + i), close_cb);

  ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));
  after_all = uv_hrtime();

  ASSERT(timer_cb_called == NUM_TIMERS);
  ASSERT(close_cb_called == NUM_TIMERS);
  free(timers);

  fprintf(stderr, "%.2f seconds total\n", (after_all - before_all) / 1e9);
  fprintf(stderr, "%.2f seconds init\n", (before_run - before_all) / 1e9);
  fprintf(stderr, "%.2f seconds dispatch\n", (after_run - before_run) / 1e9);
  fprintf(stderr, "%.2f seconds cleanup\n", (after_all - after_run) / 1e9);
  fflush(stderr);

  MAKE_VALGRIND_HAPPY();
  return 0;
}