diff --git a/src/twn_util.c b/src/twn_util.c
index 05db8ad..85a0aff 100644
--- a/src/twn_util.c
+++ b/src/twn_util.c
@@ -9,6 +9,14 @@
 #include <stdarg.h>
 
 
+static struct ProfileItem {
+    char const *key;
+    struct Profile {
+        uint64_t tick;
+    } value;
+} *profiles;
+
+
 void cry_impl(const char *file, const int line, const char *title, const char *text) {
     SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION,
                     "TEARS AT %s:%d: %s ... %s", file, line, title, text);
@@ -287,3 +295,19 @@ char *expand_asterisk(const char *mask, const char *to) {
     SDL_memcpy(str + (offset - mask) + to_len, offset + 1, mask_len - (offset - mask));
     return str;
 }
+
+
+void profile_start(char profile[const static 1]) {
+    shput(profiles, profile, (struct Profile){ .tick = SDL_GetPerformanceCounter() });
+}
+
+
+void profile_end(char profile[const static 1]) {
+    struct ProfileItem *p = shgetp_null(profiles, profile);
+    if (!p) {
+        log_warn("profile %s wasn't started!", profile);
+        return;
+    }
+    log_info("profile '%s' took: %fsec", profile, (double)(SDL_GetPerformanceCounter() - p->value.tick) / (double)(SDL_GetPerformanceFrequency()));
+    shdel(profiles, profile);
+}
diff --git a/src/twn_util_c.h b/src/twn_util_c.h
index c867ea3..5f83682 100644
--- a/src/twn_util_c.h
+++ b/src/twn_util_c.h
@@ -23,6 +23,9 @@ _Noreturn void die_abruptly(void);
 /* note: you must free the returned string */
 char *expand_asterisk(const char *mask, const char *to);
 
+void profile_start(char profile[const static 1]);
+void profile_end(char profile[const static 1]);
+
 /* http://www.azillionmonkeys.com/qed/sqroot.html */
 static inline float fast_sqrt(float x)
 {