loop: add sleep between loop

Author: krichprollsch

src/async/tcp.zig

@@ -41,7 +41,10 @@ pub const Conn = struct {
         }
 
         fn wait(self: *Command) !usize {
-            while (!self.done) try self.impl.tick();
+            while (!self.done) {
+                try self.impl.tick();
+                std.time.sleep(100); // 100ns
+            }
 
             if (self.err) |err| return err;
             return self.ln;

src/server.zig

@@ -464,5 +464,6 @@ pub fn listen(
             if (err != error.NoError) log.err("Server error: {any}", .{err});
             break;
         }
+        std.time.sleep(1000); // 1ms
     }
 }