1 files changed, 48 insertions, 0 deletions
diff --git a/perf.c b/perf.c
new file mode 100644
index 0000000..8ed1d42
--- /dev/null
+++ b/perf.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2023 Mikhail Burakov. This file is part of streamer.
+ *
+ * streamer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * streamer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with streamer.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "perf.h"
+
+#include <limits.h>
+#include <stdio.h>
+#include <time.h>
+
+#include "util.h"
+
+unsigned long long MicrosNow(void) {
+  struct timespec ts = {.tv_sec = 0, .tv_nsec = 0};
+  clock_gettime(CLOCK_MONOTONIC, &ts);
+  return (unsigned long long)ts.tv_sec * 1000000ull +
+         (unsigned long long)ts.tv_nsec / 1000ull;
+}
+
+void TimingStatsReset(struct TimingStats* timing_stats) {
+  *timing_stats = (struct TimingStats){.min = ULLONG_MAX};
+}
+
+void TimingStatsRecord(struct TimingStats* timing_stats,
+                       unsigned long long value) {
+  timing_stats->min = MIN(timing_stats->min, value);
+  timing_stats->max = MAX(timing_stats->max, value);
+  timing_stats->sum += value;
+}
+
+void TimingStatsLog(const struct TimingStats* timing_stats, const char* name,
+                    unsigned long long counter) {
+  LOG("%s min/avg/max: %llu/%llu/%llu", name, timing_stats->min,
+      timing_stats->sum / counter, timing_stats->max);
+}