diff --git a/core/sys/fs_mem.go b/core/sys/fs_mem.go
index 369504a45..3d9f01823 100644
--- a/core/sys/fs_mem.go
+++ b/core/sys/fs_mem.go
@@ -310,7 +310,7 @@ func (f *MemChanFile) Write(p []byte) (n int, err error) {
 		f.Buffer <- data
 	} else {
 		if cap(f.data) == 0 {
-			f.data = make([]byte, 0, f.ChunkWriteSize)
+			f.data = make([]byte, 0, len(p))
 		}
 		f.data = append(f.data, p...)
 	}
@@ -326,7 +326,7 @@ func (f *MemChanFile) Sync() error {
 		}
 		f.Buffer <- f.data[current:end]
 	}
-	f.data = make([]byte, 0, f.ChunkWriteSize)
+	f.data = nil
 	return nil
 }
 func (f *MemChanFile) Seek(offset int64, whence int) (ret int64, err error) {
diff --git a/zboxcore/sdk/allocation.go b/zboxcore/sdk/allocation.go
index 24a2458b1..cd0f01f6e 100644
--- a/zboxcore/sdk/allocation.go
+++ b/zboxcore/sdk/allocation.go
@@ -402,11 +402,13 @@ func (a *Allocation) RepairFile(file sys.File, remotepath string, statusCallback
 			WithEncrypt(true),
 			WithStatusCallback(statusCallback),
 			WithEncryptedPoint(ref.EncryptedKeyPoint),
+			WithChunkNumber(100),
 		}
 	} else {
 		opts = []ChunkedUploadOption{
 			WithMask(mask),
 			WithStatusCallback(statusCallback),
+			WithChunkNumber(100),
 		}
 	}
 	op := &OperationRequest{
@@ -1106,6 +1108,9 @@ func (a *Allocation) generateDownloadRequest(
 	downloadReq.contentMode = contentMode
 	downloadReq.connectionID = connectionID
 	downloadReq.downloadQueue = make(downloadQueue, len(a.Blobbers))
+	for i := 0; i < len(a.Blobbers); i++ {
+		downloadReq.downloadQueue[i].timeTaken = 1000000
+	}
 
 	return downloadReq, nil
 }
@@ -2219,6 +2224,9 @@ func (a *Allocation) downloadFromAuthTicket(fileHandler sys.File, authTicket str
 	downloadReq.fullconsensus = a.fullconsensus
 	downloadReq.consensusThresh = a.consensusThreshold
 	downloadReq.downloadQueue = make(downloadQueue, len(a.Blobbers))
+	for i := 0; i < len(a.Blobbers); i++ {
+		downloadReq.downloadQueue[i].timeTaken = 1000000
+	}
 	downloadReq.connectionID = zboxutil.NewConnectionId()
 	downloadReq.completedCallback = func(remotepath string, remotepathHash string) {
 		a.mutex.Lock()
diff --git a/zboxcore/sdk/downloadworker.go b/zboxcore/sdk/downloadworker.go
index a2c65f3dd..3fbbafd24 100644
--- a/zboxcore/sdk/downloadworker.go
+++ b/zboxcore/sdk/downloadworker.go
@@ -105,7 +105,7 @@ type DownloadRequest struct {
 	bufferMap          map[int]zboxutil.DownloadBuffer
 	downloadStorer     DownloadProgressStorer
 	workdir            string
-	downloadQueue      downloadQueue
+	downloadQueue      downloadQueue // Always initialize this queue with max time taken
 }
 
 type downloadPriority struct {
@@ -681,7 +681,7 @@ func (req *DownloadRequest) processDownload() {
 	var progressLock sync.Mutex
 	firstReqWG := sync.WaitGroup{}
 	firstReqWG.Add(1)
-	eg, _ := errgroup.WithContext(ctx)
+	eg, egCtx := errgroup.WithContext(ctx)
 	eg.SetLimit(downloadWorkerCount + EXTRA_COUNT)
 	for i := 0; i < n; i++ {
 		j := i
@@ -689,6 +689,11 @@ func (req *DownloadRequest) processDownload() {
 			firstReqWG.Wait()
 			heap.Init(&req.downloadQueue)
 		}
+		select {
+		case <-egCtx.Done():
+			goto breakDownloadLoop
+		default:
+		}
 		eg.Go(func() error {
 
 			if j == 0 {
@@ -738,6 +743,7 @@ func (req *DownloadRequest) processDownload() {
 			}
 			return nil
 		})
+	breakDownloadLoop:
 	}
 	if err := eg.Wait(); err != nil {
 		writeCancel()
diff --git a/zboxcore/sdk/repairworker.go b/zboxcore/sdk/repairworker.go
index bc8e0d90e..f271f3939 100644
--- a/zboxcore/sdk/repairworker.go
+++ b/zboxcore/sdk/repairworker.go
@@ -63,7 +63,7 @@ func (r *RepairRequest) processRepair(ctx context.Context, a *Allocation) {
 	if r.checkForCancel(a) {
 		return
 	}
-
+	SetNumBlockDownloads(100)
 	r.iterateDir(a, r.listDir)
 
 	if r.statusCB != nil {
@@ -177,7 +177,7 @@ func (r *RepairRequest) repairFile(a *Allocation, file *ListResult) []OperationR
 					return nil
 				}
 				memFile := &sys.MemChanFile{
-					Buffer:         make(chan []byte, 10),
+					Buffer:         make(chan []byte, 100),
 					ChunkWriteSize: int(a.GetChunkReadSize(ref.EncryptedKey != "")),
 				}
 				op = a.RepairFile(memFile, file.Path, statusCB, found, ref)