diff --git a/Gopkg.lock b/Gopkg.lock
index 1d6ad607..ac906fb8 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -1,4 +1,5 @@
-memo = "d665cbc0144a6e4c06ed8fcfbee8594a7203e47e654eeca63e11d651ae62a3a7"
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
 
 [[projects]]
   name = "code.cloudfoundry.org/bytefmt"
@@ -20,8 +21,12 @@ memo = "d665cbc0144a6e4c06ed8fcfbee8594a7203e47e654eeca63e11d651ae62a3a7"
 [[projects]]
   branch = "master"
   name = "github.com/goshuirc/irc-go"
-  packages = ["ircfmt","ircmatch","ircmsg"]
-  revision = "1cb16094f055aa5f5b49a1609aeada54d963433c"
+  packages = [
+    "ircfmt",
+    "ircmatch",
+    "ircmsg"
+  ]
+  revision = "8d136c4f92871c1c132bf702022363add479291b"
 
 [[projects]]
   branch = "master"
@@ -50,7 +55,11 @@ memo = "d665cbc0144a6e4c06ed8fcfbee8594a7203e47e654eeca63e11d651ae62a3a7"
 [[projects]]
   branch = "master"
   name = "github.com/stackimpact/stackimpact-go"
-  packages = [".","internal","internal/pprof/profile"]
+  packages = [
+    ".",
+    "internal",
+    "internal/pprof/profile"
+  ]
   revision = "8b5b02c181e477dafcf505342d8a79b5c8241da7"
 
 [[projects]]
@@ -86,7 +95,10 @@ memo = "d665cbc0144a6e4c06ed8fcfbee8594a7203e47e654eeca63e11d651ae62a3a7"
 [[projects]]
   branch = "master"
   name = "github.com/tidwall/rtree"
-  packages = [".","base"]
+  packages = [
+    ".",
+    "base"
+  ]
   revision = "6cd427091e0e662cb4f8e2c9eb1a41e1c46ff0d3"
 
 [[projects]]
@@ -98,19 +110,46 @@ memo = "d665cbc0144a6e4c06ed8fcfbee8594a7203e47e654eeca63e11d651ae62a3a7"
 [[projects]]
   branch = "master"
   name = "golang.org/x/crypto"
-  packages = ["bcrypt","blowfish","ssh/terminal"]
+  packages = [
+    "bcrypt",
+    "blowfish",
+    "ssh/terminal"
+  ]
   revision = "5119cf507ed5294cc409c092980c7497ee5d6fd2"
 
 [[projects]]
   branch = "master"
   name = "golang.org/x/sys"
-  packages = ["unix","windows"]
+  packages = [
+    "unix",
+    "windows"
+  ]
   revision = "37707fdb30a5b38865cfb95e5aab41707daec7fd"
 
 [[projects]]
   branch = "master"
   name = "golang.org/x/text"
-  packages = ["cases","collate","collate/build","internal","internal/colltab","internal/gen","internal/tag","internal/triegen","internal/ucd","language","runes","secure/bidirule","secure/precis","transform","unicode/bidi","unicode/cldr","unicode/norm","unicode/rangetable","width"]
+  packages = [
+    "cases",
+    "collate",
+    "collate/build",
+    "internal",
+    "internal/colltab",
+    "internal/gen",
+    "internal/tag",
+    "internal/triegen",
+    "internal/ucd",
+    "language",
+    "runes",
+    "secure/bidirule",
+    "secure/precis",
+    "transform",
+    "unicode/bidi",
+    "unicode/cldr",
+    "unicode/norm",
+    "unicode/rangetable",
+    "width"
+  ]
   revision = "4e4a3210bb54bb31f6ab2cdca2edcc0b50c420c1"
 
 [[projects]]
@@ -118,3 +157,10 @@ memo = "d665cbc0144a6e4c06ed8fcfbee8594a7203e47e654eeca63e11d651ae62a3a7"
   name = "gopkg.in/yaml.v2"
   packages = ["."]
   revision = "d670f9405373e636a5a2765eea47fac0c9bc91a4"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "1f6e6db999e9e75b04aee6f0018be1557848f8248a28cf21783188fdeb866718"
+  solver-name = "gps-cdcl"
+  solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
index 47c02714..bd71f751 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -57,24 +57,16 @@
 
 [[dependencies]]
   branch = "master"
-  name = "github.com/DanielOaks/girc-go"
+  name = "github.com/goshuirc/irc-go"
 
 [[dependencies]]
   branch = "master"
-  name = "github.com/DanielOaks/go-ident"
+  name = "github.com/oragono/go-ident"
 
 [[dependencies]]
   branch = "master"
   name = "github.com/docopt/docopt-go"
 
-[[dependencies]]
-  branch = "master"
-  name = "github.com/gorilla/mux"
-
-[[dependencies]]
-  branch = "master"
-  name = "github.com/gorilla/websocket"
-
 [[dependencies]]
   branch = "master"
   name = "github.com/mattn/go-colorable"
diff --git a/irc/client.go b/irc/client.go
index 30776416..f105f852 100644
--- a/irc/client.go
+++ b/irc/client.go
@@ -820,13 +820,13 @@ func (client *Client) SendRawMessage(message ircmsg.IrcMessage) error {
 
 	// assemble message
 	maxlenTags, maxlenRest := client.maxlens()
-	line, err := message.LineMaxLen(maxlenTags, maxlenRest)
+	line, err := message.LineMaxLenBytes(maxlenTags, maxlenRest)
 	if err != nil {
 		logline := fmt.Sprintf("Error assembling message for sending: %v\n%s", err, debug.Stack())
 		client.server.logger.Error("internal", logline)
 
 		message = ircmsg.MakeMessage(nil, client.server.name, ERR_UNKNOWNERROR, "*", "Error assembling message for sending")
-		line, _ := message.Line()
+		line, _ := message.LineBytes()
 
 		client.socket.Write(line)
 		return err
@@ -834,10 +834,14 @@ func (client *Client) SendRawMessage(message ircmsg.IrcMessage) error {
 
 	// if we used the trailing hack, we need to strip the final space we appended earlier on
 	if usedTrailingHack {
-		line = line[:len(line)-3] + "\r\n"
+		copy(line[len(line)-3:], []byte{'\r', '\n'})
+		line = line[:len(line)-1]
 	}
 
-	client.server.logger.Debug("useroutput", client.nick, " ->", strings.TrimRight(line, "\r\n"))
+	if client.server.logger.IsLoggingRawIO() {
+		logline := string(line[:len(line)-2]) // strip "\r\n"
+		client.server.logger.Debug("useroutput", client.nick, " ->", logline)
+	}
 
 	client.socket.Write(line)
 
diff --git a/irc/logger/logger.go b/irc/logger/logger.go
index 2e9f2f05..48cbb097 100644
--- a/irc/logger/logger.go
+++ b/irc/logger/logger.go
@@ -12,6 +12,7 @@ import (
 	"strings"
 
 	"sync"
+	"sync/atomic"
 
 	colorable "github.com/mattn/go-colorable"
 	"github.com/mgutz/ansi"
@@ -57,7 +58,7 @@ type Manager struct {
 	loggers         []singleLogger
 	stdoutWriteLock sync.Mutex // use one lock for both stdout and stderr
 	fileWriteLock   sync.Mutex
-	loggingRawIO    bool
+	loggingRawIO    uint32
 }
 
 // LoggingConfig represents the configuration of a single logger.
@@ -95,7 +96,7 @@ func (logger *Manager) ApplyConfig(config []LoggingConfig) error {
 	}
 
 	logger.loggers = nil
-	logger.loggingRawIO = false
+	atomic.StoreUint32(&logger.loggingRawIO, 0)
 
 	// for safety, this deep-copies all mutable data in `config`
 	// XXX let's keep it that way
@@ -124,7 +125,7 @@ func (logger *Manager) ApplyConfig(config []LoggingConfig) error {
 			fileWriteLock:   &logger.fileWriteLock,
 		}
 		if typeMap["userinput"] || typeMap["useroutput"] || (typeMap["*"] && !(excludedTypeMap["userinput"] && excludedTypeMap["useroutput"])) {
-			logger.loggingRawIO = true
+			atomic.StoreUint32(&logger.loggingRawIO, 1)
 		}
 		if sLogger.MethodFile.Enabled {
 			file, err := os.OpenFile(sLogger.MethodFile.Filename, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0666)
@@ -143,9 +144,7 @@ func (logger *Manager) ApplyConfig(config []LoggingConfig) error {
 
 // IsLoggingRawIO returns true if raw user input and output is being logged.
 func (logger *Manager) IsLoggingRawIO() bool {
-	logger.configMutex.RLock()
-	defer logger.configMutex.RUnlock()
-	return logger.loggingRawIO
+	return atomic.LoadUint32(&logger.loggingRawIO) == 1
 }
 
 // Log logs the given message with the given details.
diff --git a/irc/socket.go b/irc/socket.go
index 6382e498..663377d3 100644
--- a/irc/socket.go
+++ b/irc/socket.go
@@ -34,7 +34,8 @@ type Socket struct {
 	// this is a trylock enforcing that only one goroutine can write to `conn` at a time
 	writerSemaphore Semaphore
 
-	buffer        []byte
+	buffers       [][]byte
+	totalLength   int
 	closed        bool
 	sendQExceeded bool
 	finalData     string // what to send when we die
@@ -121,15 +122,23 @@ func (socket *Socket) Read() (string, error) {
 // 2. MUST NOT reorder messages
 // 3. MUST provide mutual exclusion for socket.conn.Write
 // 4. SHOULD NOT tie up additional goroutines, beyond the one blocked on socket.conn.Write
-func (socket *Socket) Write(data string) (err error) {
+func (socket *Socket) Write(data []byte) (err error) {
+	if len(data) == 0 {
+		return
+	}
+
 	socket.Lock()
 	if socket.closed {
 		err = io.EOF
-	} else if len(data)+len(socket.buffer) > socket.maxSendQBytes {
-		socket.sendQExceeded = true
-		err = errSendQExceeded
 	} else {
-		socket.buffer = append(socket.buffer, data...)
+		prospectiveLen := socket.totalLength + len(data)
+		if prospectiveLen > socket.maxSendQBytes {
+			socket.sendQExceeded = true
+			err = errSendQExceeded
+		} else {
+			socket.buffers = append(socket.buffers, data)
+			socket.totalLength = prospectiveLen
+		}
 	}
 	socket.Unlock()
 
@@ -165,7 +174,7 @@ func (socket *Socket) readyToWrite() bool {
 	socket.Lock()
 	defer socket.Unlock()
 	// on the first time observing socket.closed, we still have to write socket.finalData
-	return !socket.finalized && (len(socket.buffer) > 0 || socket.closed || socket.sendQExceeded)
+	return !socket.finalized && (socket.totalLength > 0 || socket.closed || socket.sendQExceeded)
 }
 
 // send actually writes messages to socket.Conn; it may block
@@ -193,11 +202,13 @@ func (socket *Socket) send() {
 func (socket *Socket) performWrite() {
 	// retrieve the buffered data, clear the buffer
 	socket.Lock()
-	buffer := socket.buffer
-	socket.buffer = nil
+	buffers := socket.buffers
+	socket.buffers = nil
+	socket.totalLength = 0
 	socket.Unlock()
 
-	_, err := socket.conn.Write(buffer)
+	// on Linux, the runtime will optimize this into a single writev(2) call:
+	_, err := (*net.Buffers)(&buffers).WriteTo(socket.conn)
 
 	socket.Lock()
 	shouldClose := (err != nil) || socket.closed || socket.sendQExceeded
diff --git a/vendor b/vendor
index f606564d..9dd7467d 160000
--- a/vendor
+++ b/vendor
@@ -1 +1 @@
-Subproject commit f606564da4732e70afeb93a0fc5d80a9f8a04c56
+Subproject commit 9dd7467d3dfc045cf5dee2f6f6951465437e2ac5