connection.go | 10 ----------
 global.go     |  1 -

diff --git a/connection.go b/connection.go
index 45c2c20a387259d3349490d36f542cbb5647377f..05c5f5ea44a0406e95d852b3d8a89e4289c669a9 100644
--- a/connection.go
+++ b/connection.go
@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"bytes"
 	"errors"
-	"expvar"
 	"fmt"
 	"io"
 	"log"
@@ -23,8 +22,6 @@
 	"github.com/anacrolix/torrent/bencode"
 	pp "github.com/anacrolix/torrent/peer_protocol"
 )
-
-var optimizedCancels = expvar.NewInt("optimizedCancels")
 
 type peerSource string
 
@@ -337,13 +334,6 @@ 			}
 		}(),
 	})
 }
-
-var (
-	// Track connection writer buffer writes and flushes, to determine its
-	// efficiency.
-	connectionWriterFlush = expvar.NewInt("connectionWriterFlush")
-	connectionWriterWrite = expvar.NewInt("connectionWriterWrite")
-)
 
 func (cn *connection) fillWriteBuffer(msg func(pp.Message) bool) {
 	numFillBuffers.Add(1)
diff --git a/global.go b/global.go
index a89659aeb2b720a9c9b36d9f5f3739dfeaaf696d..9e357c5678ab8e8fb52101880eb8c00af8d42946 100644
--- a/global.go
+++ b/global.go
@@ -63,7 +63,6 @@ 	peersAddedBySource = expvar.NewMap("peersAddedBySource")
 
 	uploadChunksPosted = expvar.NewInt("uploadChunksPosted")
 	unexpectedCancels  = expvar.NewInt("unexpectedCancels")
-	postedCancels      = expvar.NewInt("postedCancels")
 
 	pieceHashedCorrect    = expvar.NewInt("pieceHashedCorrect")
 	pieceHashedNotCorrect = expvar.NewInt("pieceHashedNotCorrect")