From 818f68ec53ce3c2c88064bbbc9cc3249917b8a00 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 24 Aug 2022 20:47:00 +0530
Subject: [PATCH] Initialize various maps

---
 tools/tui/key-encoding.go | 3 +++
 tools/tui/loop.go         | 4 ++--
 tools/tui/select.go       | 8 ++++++++
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/tools/tui/key-encoding.go b/tools/tui/key-encoding.go
index 339fdab24..79a06d758 100644
--- a/tools/tui/key-encoding.go
+++ b/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
 	}
diff --git a/tools/tui/loop.go b/tools/tui/loop.go
index 14d09e5da..f7a930be5 100644
--- a/tools/tui/loop.go
+++ b/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 {
diff --git a/tools/tui/select.go b/tools/tui/select.go
index 571ffdb03..8eb665ef6 100644
--- a/tools/tui/select.go
+++ b/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
 }