Initialize various maps

tools/tui/key-encoding.go

@@ -151,6 +151,9 @@ type ParsedShortcut struct {
 var parsed_shortcut_cache map[string]ParsedShortcut
 
 func ParseShortcut(spec string) *ParsedShortcut {
+	if parsed_shortcut_cache == nil {
+		parsed_shortcut_cache = make(map[string]ParsedShortcut, 128)
+	}
 	if val, ok := parsed_shortcut_cache[spec]; ok {
 		return &val
 	}

tools/tui/loop.go

@@ -209,7 +209,7 @@ func (self *Loop) Run() (err error) {
 		return nil
 	}
 
-	var selector Select
+	selector := CreateSelect(8)
 	selector.RegisterRead(int(signal_read_file.Fd()))
 	selector.RegisterRead(tty_fd)
 
@@ -318,10 +318,10 @@ func (self *Loop) write_to_tty() error {
 }
 
 func (self *Loop) flush() error {
-	var selector Select
 	if self.controlling_term == nil {
 		return nil
 	}
+	selector := CreateSelect(1)
 	selector.RegisterWrite(self.controlling_term.Fd())
 	deadline := time.Now().Add(2 * time.Second)
 	for len(self.write_buf) > 0 {

tools/tui/select.go

@@ -13,6 +13,14 @@ type Select struct {
 	read_fds, write_fds, err_fds map[int]bool
 }
 
+func CreateSelect(expected_number_of_fds int) *Select {
+	var ans Select
+	ans.read_fds = make(map[int]bool, expected_number_of_fds)
+	ans.write_fds = make(map[int]bool, expected_number_of_fds)
+	ans.err_fds = make(map[int]bool, expected_number_of_fds)
+	return &ans
+}
+
 func (self *Select) register(fd int, fdset *map[int]bool) {
 	(*fdset)[fd] = true
 }