benches, optimizations for sin and cos

Common/Timer/timer.h

@@ -0,0 +1,14 @@
+#ifndef COM_TIMER_H
+#define COM_TIMER_H
+
+#include "../def.h"
+#include <stdint.h>
+
+/* Global monotonic counter, meaning it always increases. Not applicable for
+ * getting "real" time, which the game shouldn't be aware of anyways. */
+uint64_t com_timer_count_ns(void);
+
+/* Output elapsed time against previous com_timer_count_ns() result. */
+void com_timer_profile(uint64_t starttime, const char *what);
+
+#endif

Common/Timer/unix.c

@@ -0,0 +1,17 @@
+#include "timer.h"
+#include <stdint.h>
+#include <stdio.h>
+#define __USE_POSIX199309 1
+#include <time.h>
+
+uint64_t com_timer_count_ns(void) {
+  struct timespec time;
+  clock_gettime(CLOCK_MONOTONIC, &time);
+  return time.tv_sec * 1000000000 + time.tv_nsec;
+}
+
+void com_timer_profile(uint64_t starttime, const char *what) {
+  uint64_t const endtime = com_timer_count_ns();
+  uint64_t const diff = endtime - starttime;
+  printf("profile \"%s\" took %fms\n", what, (double)diff / 1000000);
+}