From 09218898e9fed0bac9c1dbc492dd34de3672d43b Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Tue, 9 Jan 2018 23:11:34 +1100
Subject: [PATCH] Use NoSync with bolt storage and piece completion

Fixes terrible slowness on Linux.
---
 storage/boltPieceCompletion.go |  1 +
 storage/boltdb.go              | 15 ++++++++-------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/storage/boltPieceCompletion.go b/storage/boltPieceCompletion.go
index 93cf8d6f..d0accb1d 100644
--- a/storage/boltPieceCompletion.go
+++ b/storage/boltPieceCompletion.go
@@ -35,6 +35,7 @@ func NewBoltPieceCompletion(dir string) (ret PieceCompletion, err error) {
 	if err != nil {
 		return
 	}
+	db.NoSync = true
 	ret = &boltPieceCompletion{db}
 	return
 }
diff --git a/storage/boltdb.go b/storage/boltdb.go
index 6c8de430..6586ff0e 100644
--- a/storage/boltdb.go
+++ b/storage/boltdb.go
@@ -3,7 +3,9 @@ package storage
 import (
 	"encoding/binary"
 	"path/filepath"
+	"time"
 
+	"github.com/anacrolix/missinggo/assert"
 	"github.com/boltdb/bolt"
 
 	"github.com/anacrolix/torrent/metainfo"
@@ -25,13 +27,12 @@ type boltDBTorrent struct {
 }
 
 func NewBoltDB(filePath string) ClientImpl {
-	ret := &boltDBClient{}
-	var err error
-	ret.db, err = bolt.Open(filepath.Join(filePath, "bolt.db"), 0600, nil)
-	if err != nil {
-		panic(err)
-	}
-	return ret
+	db, err := bolt.Open(filepath.Join(filePath, "bolt.db"), 0600, &bolt.Options{
+		Timeout: time.Second,
+	})
+	assert.Nil(err)
+	db.NoSync = true
+	return &boltDBClient{db}
 }
 
 func (me *boltDBClient) Close() error {
-- 
2.48.1