Disable HTTP/2 for speaking to GCS.

Due to golang/go#15930. Fixes #173.

main.go

@@ -21,9 +21,11 @@
 package main
 
 import (
+	"crypto/tls"
 	"fmt"
 	"io/ioutil"
 	"log"
+	"net/http"
 	"os"
 	"os/signal"
 	"path"
@@ -46,6 +48,17 @@ import (
 	"github.com/kardianos/osext"
 )
 
+// httpTransport is a transport with HTTP/2 disabled. This is to work around
+// very high memory usage for our read pattern (http://golang.org/issue/15930)
+// and can be removed when we're building with a version of Go that has that
+// issue fixed.
+var httpTransport = func() *http.Transport {
+	t := &http.Transport{}
+	*t = *(http.DefaultTransport.(*http.Transport))
+	t.TLSNextProto = map[string]func(string, *tls.Conn) http.RoundTripper{}
+	return t
+}()
+
 ////////////////////////////////////////////////////////////////////////
 // Helpers
 ////////////////////////////////////////////////////////////////////////
@@ -205,6 +218,7 @@ func getConn(flags *flagStorage) (c gcs.Conn, err error) {
 	const userAgent = "gcsfuse/0.0"
 	cfg := &gcs.ConnConfig{
 		TokenSource: tokenSrc,
+		Transport:   httpTransport,
 		UserAgent:   userAgent,
 	}
 

vendor/vendor.json

@@ -61,29 +61,34 @@
 			"revisionTime": "2016-05-16T00:07:28Z"
 		},
 		{
+			"checksumSHA1": "v79niRn3bst9dPvawWXCi0BRYS8=",
 			"path": "github.com/jacobsa/gcloud/gcs",
-			"revision": "60dc0c7874d8adf958f7ded1e2edda4d7b3e8318",
-			"revisionTime": "2016-02-19T11:39:26+11:00"
+			"revision": "e9e54fcd1efc94e58b06aed435eca4b3f837da71",
+			"revisionTime": "2016-06-02T12:04:01Z"
 		},
 		{
+			"checksumSHA1": "NpZ4b33firshwopE9w/rzHFMIxg=",
 			"path": "github.com/jacobsa/gcloud/gcs/gcscaching",
-			"revision": "60dc0c7874d8adf958f7ded1e2edda4d7b3e8318",
-			"revisionTime": "2016-02-19T11:39:26+11:00"
+			"revision": "e9e54fcd1efc94e58b06aed435eca4b3f837da71",
+			"revisionTime": "2016-06-02T12:04:01Z"
 		},
 		{
+			"checksumSHA1": "4eF64wIG1vvwDIWOUr355L7zpMQ=",
 			"path": "github.com/jacobsa/gcloud/gcs/gcsfake",
-			"revision": "60dc0c7874d8adf958f7ded1e2edda4d7b3e8318",
-			"revisionTime": "2016-02-19T11:39:26+11:00"
+			"revision": "e9e54fcd1efc94e58b06aed435eca4b3f837da71",
+			"revisionTime": "2016-06-02T12:04:01Z"
 		},
 		{
+			"checksumSHA1": "1gvrpwRo8EnLnufGFGtzcyfUeIk=",
 			"path": "github.com/jacobsa/gcloud/gcs/gcsutil",
-			"revision": "60dc0c7874d8adf958f7ded1e2edda4d7b3e8318",
-			"revisionTime": "2016-02-19T11:39:26+11:00"
+			"revision": "e9e54fcd1efc94e58b06aed435eca4b3f837da71",
+			"revisionTime": "2016-06-02T12:04:01Z"
 		},
 		{
+			"checksumSHA1": "ub1Nzd6BdY10XoHOu3YVdS/6Tok=",
 			"path": "github.com/jacobsa/gcloud/httputil",
-			"revision": "60dc0c7874d8adf958f7ded1e2edda4d7b3e8318",
-			"revisionTime": "2016-02-19T11:39:26+11:00"
+			"revision": "e9e54fcd1efc94e58b06aed435eca4b3f837da71",
+			"revisionTime": "2016-06-02T12:04:01Z"
 		},
 		{
 			"path": "github.com/jacobsa/oglematchers",