only set swap interval if needed

2 files changed, 10 insertions, 2 deletions

diff --git a/main.c b/main.c
index c261817..5a86677 100644
--- a/main.c
+++ b/main.c
@@ -1147,7 +1147,15 @@ int main(int argc, char **argv) {
 					SDL_Delay((u32)ms_wait);
 				}
 			}
-			SDL_GL_SetSwapInterval(settings->vsync ? 1 : 0);
+			
+			// i don't know if SDL_GL_SetSwapInterval is slow on any platform
+			// (if you're not actually changing it). just in case, let's make sure
+			// we only call it when the vsync setting actually changes.
+			static int prev_vsync = -1;
+			if (settings->vsync != prev_vsync) {
+				prev_vsync = settings->vsync;
+				SDL_GL_SetSwapInterval(settings->vsync ? 1 : 0);
+			}
 			SDL_GL_SwapWindow(window);
 		}
 		PROFILE_TIME(frame_end)
diff --git a/ted.cfg b/ted.cfg
index 05116a5..52978cf 100644
--- a/ted.cfg
+++ b/ted.cfg
@@ -52,7 +52,7 @@ max-file-size = 20000000
 max-file-size-view-only = 100000000
 
 # whether to use vsync or not. you probably want this on.
-vsync = off
+vsync = on
 # max framerate. vsync overrides this.
 # you might want to increase this if you have a >60Hz monitor and you don't care about CPU usage.
 framerate-cap = 60