From e9a315574b96c6a235c9d55e607c3b4526eedf2f Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Tue, 6 Oct 2015 10:59:49 +0300
Subject: [PATCH] Less memory allocations

---
 daemon.go | 17 +++++++++--------
 events.go | 16 +++++++++++-----
 2 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/daemon.go b/daemon.go
index 30d8c5d..b3fed28 100644
--- a/daemon.go
+++ b/daemon.go
@@ -48,7 +48,7 @@ type Daemon struct {
 	hostname           *string
 	motd               *string
 	passwords          *string
-	clients            map[*Client]bool
+	clients            map[*Client]struct{}
 	clientAliveness    map[*Client]*ClientAlivenessState
 	rooms              map[string]*Room
 	roomSinks          map[*Room]chan ClientEvent
@@ -59,12 +59,12 @@ type Daemon struct {
 
 func NewDaemon(version string, hostname, motd, passwords *string, logSink chan<- LogEvent, stateSink chan<- StateEvent) *Daemon {
 	daemon := Daemon{
-		version: version,
-		hostname: hostname,
-		motd: motd,
+		version:   version,
+		hostname:  hostname,
+		motd:      motd,
 		passwords: passwords,
 	}
-	daemon.clients = make(map[*Client]bool)
+	daemon.clients = make(map[*Client]struct{})
 	daemon.clientAliveness = make(map[*Client]*ClientAlivenessState)
 	daemon.rooms = make(map[string]*Room)
 	daemon.roomSinks = make(map[*Room]chan ClientEvent)
@@ -303,8 +303,9 @@ func (daemon *Daemon) HandlerJoin(client *Client, cmd string) {
 }
 
 func (daemon *Daemon) Processor(events <-chan ClientEvent) {
+	var now time.Time
 	for event := range events {
-		now := time.Now()
+		now = time.Now()
 		client := event.client
 
 		// Check for clients aliveness
@@ -334,9 +335,9 @@ func (daemon *Daemon) Processor(events <-chan ClientEvent) {
 
 		switch event.eventType {
 		case EventNew:
-			daemon.clients[client] = true
+			daemon.clients[client] = struct{}{}
 			daemon.clientAliveness[client] = &ClientAlivenessState{
-				pingSent: false,
+				pingSent:  false,
 				timestamp: now,
 			}
 		case EventDel:
diff --git a/events.go b/events.go
index 843e8b5..44974b8 100644
--- a/events.go
+++ b/events.go
@@ -66,9 +66,12 @@ func Logger(logdir string, events <-chan LogEvent) {
 	mode := os.O_CREATE | os.O_WRONLY | os.O_APPEND
 	perm := os.FileMode(0660)
 	var format string
+	var logfile string
+	var fd *os.File
+	var err error
 	for event := range events {
-		logfile := path.Join(logdir, event.where)
-		fd, err := os.OpenFile(logfile, mode, perm)
+		logfile = path.Join(logdir, event.where)
+		fd, err = os.OpenFile(logfile, mode, perm)
 		if err != nil {
 			log.Println("Can not open logfile", logfile, err)
 			continue
@@ -96,10 +99,13 @@ type StateEvent struct {
 // Room states shows that either topic or key has been changed
 // Each room's state is written to separate file in statedir
 func StateKeeper(statedir string, events <-chan StateEvent) {
+	var fn string
+	var data string
+	var err error
 	for event := range events {
-		fn := path.Join(statedir, event.where)
-		data := event.topic + "\n" + event.key + "\n"
-		err := ioutil.WriteFile(fn, []byte(data), os.FileMode(0660))
+		fn = path.Join(statedir, event.where)
+		data = event.topic + "\n" + event.key + "\n"
+		err = ioutil.WriteFile(fn, []byte(data), os.FileMode(0660))
 		if err != nil {
 			log.Printf("Can not write statefile %s: %v", fn, err)
 		}