Tentative performance fix

Author: mptre

pick.c

@@ -354,8 +354,19 @@ selected_choice(void)
 		length = choices.length;
 		if (doread) {
 			if (get_choices(STDIN_FILENO)) {
-				if (query_length > 0)
+				if (query_length > 0) {
 					dofilter = 1;
+					query_grew = 1;
+					for (i = length; i < choices.length; i++) {
+						struct choice *new, *old, tmp;
+						new = choices.v + i;
+						old = choices.v + choices_count + (i - length);
+						tmp = *new;
+						*new = *old;
+						*old = tmp;
+					}
+					choices_count += choices.length - length;
+				}
 			} else {
 				/*
 				 * if xpoll uses kqueue, close the fd in order