Use 8 as default value for git lfs concurrency (#32421)

Author: wxiaoguang

Diff for: custom/conf/app.example.ini

@@ -2650,7 +2650,7 @@ LEVEL = Info
 ;; Limit the number of pointers in each batch request to this number
 ;BATCH_SIZE = 20
 ;; Limit the number of concurrent upload/download operations within a batch
-;BATCH_OPERATION_CONCURRENCY = 3
+;BATCH_OPERATION_CONCURRENCY = 8
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

Diff for: modules/lfs/http_client.go

@@ -136,6 +136,9 @@ func (c *HTTPClient) performOperation(ctx context.Context, objects []Pointer, dc
 		return fmt.Errorf("TransferAdapter not found: %s", result.Transfer)
 	}
 
+	if setting.LFSClient.BatchOperationConcurrency <= 0 {
+		panic("BatchOperationConcurrency must be greater than 0, forgot to init?")
+	}
 	errGroup, groupCtx := errgroup.WithContext(ctx)
 	errGroup.SetLimit(setting.LFSClient.BatchOperationConcurrency)
 	for _, object := range result.Objects {

Diff for: modules/lfs/http_client_test.go

@@ -237,7 +237,7 @@ func TestHTTPClientDownload(t *testing.T) {
 		},
 	}
 
-	defer test.MockVariableValue(&setting.LFSClient.BatchOperationConcurrency, 3)()
+	defer test.MockVariableValue(&setting.LFSClient.BatchOperationConcurrency, 8)()
 	for _, c := range cases {
 		t.Run(c.endpoint, func(t *testing.T) {
 			client := &HTTPClient{
@@ -337,7 +337,7 @@ func TestHTTPClientUpload(t *testing.T) {
 		},
 	}
 
-	defer test.MockVariableValue(&setting.LFSClient.BatchOperationConcurrency, 3)()
+	defer test.MockVariableValue(&setting.LFSClient.BatchOperationConcurrency, 8)()
 	for _, c := range cases {
 		t.Run(c.endpoint, func(t *testing.T) {
 			client := &HTTPClient{

Diff for: modules/setting/lfs.go

@@ -68,8 +68,8 @@ func loadLFSFrom(rootCfg ConfigProvider) error {
 	}
 
 	if LFSClient.BatchOperationConcurrency < 1 {
-		// match the default git-lfs's `lfs.concurrenttransfers`
-		LFSClient.BatchOperationConcurrency = 3
+		// match the default git-lfs's `lfs.concurrenttransfers` https://github.com/git-lfs/git-lfs/blob/main/docs/man/git-lfs-config.adoc#upload-and-download-transfer-settings
+		LFSClient.BatchOperationConcurrency = 8
 	}
 
 	LFS.HTTPAuthExpiry = sec.Key("LFS_HTTP_AUTH_EXPIRY").MustDuration(24 * time.Hour)

Diff for: modules/setting/lfs_test.go

@@ -114,7 +114,7 @@ BATCH_SIZE = 0
 	assert.NoError(t, loadLFSFrom(cfg))
 	assert.EqualValues(t, 100, LFS.MaxBatchSize)
 	assert.EqualValues(t, 20, LFSClient.BatchSize)
-	assert.EqualValues(t, 3, LFSClient.BatchOperationConcurrency)
+	assert.EqualValues(t, 8, LFSClient.BatchOperationConcurrency)
 
 	iniStr = `
 [lfs_client]