Only run after 100ms to prevent flashing updates

When updating too often the content flashes and looks very weird.

zig/sdl/hello_sdl.zig

@@ -333,10 +333,13 @@ pub fn main() !void {
    var quit = false;
    var skip: i32 = 0;
    var num_lines: i32 = 0;
    var changed = false;
    var lastChange: u32 = 0;
    while (!quit) {
        var event: c.SDL_Event = undefined;
        var changed = false;
        var confirmed = false;
        var event: c.SDL_Event = undefined;
        while (c.SDL_PollEvent(&event) != 0) {
            const ctrlPressed = (keyboardState[c.SDL_SCANCODE_LCTRL] != 0);
            switch (event.@"type") {
@@ -452,10 +455,13 @@ pub fn main() !void {
        const cmd = std.mem.trim(u8, std.mem.sliceTo(&msg, 0), &std.ascii.spaces);
        if (changed) {
        if (changed and c.SDL_GetTicks() - lastChange > 100) {
            for (commands) |*command| {
                _ = try command.run(gpa, cmd, confirmed);
            }
            changed = false;
            lastChange = c.SDL_GetTicks();
        }
        _ = c.SDL_SetRenderDrawColor(renderer, 0, 0, 0, 100);