s3: Increase MaxIdleConnsPerHost

src/restic/backend/s3/s3.go

@@ -3,9 +3,12 @@ package s3
 import (
 	"bytes"
 	"io"
+	"net"
+	"net/http"
 	"path"
 	"restic"
 	"strings"
+	"time"
 
 	"restic/backend"
 	"restic/errors"
@@ -36,6 +39,21 @@ func Open(cfg Config) (restic.Backend, error) {
 	}
 
 	be := &s3{client: client, bucketname: cfg.Bucket, prefix: cfg.Prefix}
+
+	t := &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		DialContext: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}).DialContext,
+		MaxIdleConns:          100,
+		MaxIdleConnsPerHost:   30,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+	}
+	client.SetCustomTransport(t)
+
 	be.createConnections()
 
 	found, err := client.BucketExists(cfg.Bucket)