fix: improve UI performance

internal/orchestrator/orchestrator.go

@@ -117,7 +117,7 @@ func (o *Orchestrator) Run(mainCtx context.Context) error {
 
 // runImmutable is a helper function for Run() that runs the orchestration loop with a single version of the config.
 func (o *Orchestrator) runVersion(mainCtx context.Context, config *v1.Config) bool {
-	lock := sync.Mutex{}
+	var lock sync.Mutex
 	ctx, cancel := context.WithCancel(mainCtx)
 	
 	var wg sync.WaitGroup
@@ -140,7 +140,9 @@ func (o *Orchestrator) runVersion(mainCtx context.Context, config *v1.Config) bo
 			defer wg.Done()
 			select {
 			case <-ctx.Done():
-				timer.Stop()
+				if !timer.Stop() {
+					<-timer.C
+				}
 				zap.L().Debug("cancelled scheduled (but not running) task, orchestrator context is cancelled.", zap.String("task", t.Name()))
 				return
 			case <-timer.C:

internal/orchestrator/repo.go

@@ -19,12 +19,6 @@ type RepoOrchestrator struct {
 
 	repoConfig *v1.Repo
 	repo *restic.Repo
-
-	// TODO: decide if snapshot caching is a good idea. We gain performance but 
-	// increase background memory use by a small amount at all times (probably on the order of 1MB).
-	snapshotsMu sync.Mutex // enable very fast snapshot access IF no update is required.
-	snapshotsResetTimer *time.Timer
-	snapshots []*restic.Snapshot
 }
 
 func newRepoOrchestrator(repoConfig *v1.Repo, repo *restic.Repo) *RepoOrchestrator {
@@ -34,64 +28,26 @@ func newRepoOrchestrator(repoConfig *v1.Repo, repo *restic.Repo) *RepoOrchestrat
 	}
 }
 
-func (r *RepoOrchestrator) updateSnapshotsIfNeeded(ctx context.Context, force bool) error {
+func (r *RepoOrchestrator) Snapshots(ctx context.Context) ([]*restic.Snapshot, error) {
-	if r.snapshots != nil {
-		return nil
-	}
-
-	if r.snapshotsResetTimer != nil {
-		if !r.snapshotsResetTimer.Stop() {
-			<-r.snapshotsResetTimer.C
-		}
-	}
-
-	r.snapshotsResetTimer = time.AfterFunc(10 * time.Minute, func() {
-		r.snapshotsMu.Lock()
-		defer r.snapshotsMu.Unlock()
-		r.snapshots = nil
-	})
-
-	if r.snapshots != nil {
-		return nil
-	}
-
-
-	startTime := time.Now()
-
 	snapshots, err := r.repo.Snapshots(ctx, restic.WithPropagatedEnvVars(restic.EnvToPropagate...), restic.WithFlags("--latest", "1000"))
 	if err != nil {
-		return fmt.Errorf("failed to update snapshots: %w", err)
+		return nil, fmt.Errorf("restic.Snapshots: %w", err)
 	}
 
 	sort.SliceStable(snapshots, func(i, j int) bool {
 		return snapshots[i].UnixTimeMs() < snapshots[j].UnixTimeMs()
 	})
-	r.snapshots = snapshots
 
-	zap.L().Debug("updated snapshots", zap.String("repo", r.repoConfig.Id), zap.Duration("duration", time.Since(startTime)))
+	return snapshots, nil
-
-	return nil
-}
-
-func (r *RepoOrchestrator) Snapshots(ctx context.Context) ([]*restic.Snapshot, error) {
-	r.snapshotsMu.Lock()
-	defer r.snapshotsMu.Unlock()
-	if err := r.updateSnapshotsIfNeeded(ctx, false); err != nil {
-		return nil, err
-	}
-
-	return r.snapshots, nil
 }
 
 func (r *RepoOrchestrator) SnapshotsForPlan(ctx context.Context, plan *v1.Plan) ([]*restic.Snapshot, error) {
-	r.snapshotsMu.Lock()
+	snapshots, err := r.Snapshots(ctx)
-	defer r.snapshotsMu.Unlock()
+	if err != nil {
-	
-	if err := r.updateSnapshotsIfNeeded(ctx, false); err != nil {
 		return nil, err 
 	}
 	
-	return filterSnapshotsForPlan(r.snapshots, plan), nil
+	return filterSnapshotsForPlan(snapshots, plan), nil
 }
 
 func (r *RepoOrchestrator) Backup(ctx context.Context, plan *v1.Plan, progressCallback func(event *restic.BackupProgressEntry)) (*restic.BackupProgressEntry, error) {
@@ -123,14 +79,7 @@ func (r *RepoOrchestrator) Backup(ctx context.Context, plan *v1.Plan, progressCa
 		return nil, fmt.Errorf("failed to backup: %w", err)
 	}
 
-	// Reset snapshots since a new backup has been added.
-	r.snapshotsMu.Lock()
-	r.snapshots = nil
-	r.snapshotsMu.Unlock()
-
 	zap.L().Debug("Backup completed", zap.String("repo", r.repoConfig.Id), zap.Duration("duration", time.Since(startTime)))
-
-
 	return summary, nil
 }
 

webui/src/components/OperationList.tsx

@@ -17,10 +17,6 @@ export const OperationList = ({
 }: React.PropsWithoutRef<{ operations: EOperation[] }>) => {
   operations.sort((a, b) => b.parsedTime - a.parsedTime);
 
-  const elems = operations.map((operation) => (
-    <OperationRow operation={operation} />
-  ));
-
   if (operations.length === 0) {
     return (
       <Empty
@@ -38,6 +34,11 @@ export const OperationList = ({
       renderItem={(item, index) => (
         <OperationRow key={item.parsedId} operation={item} />
       )}
+      pagination={
+        operations.length > 50
+          ? { position: "both", align: "center", defaultPageSize: 50 }
+          : {}
+      }
     />
   );
 };
@@ -68,7 +69,10 @@ export const OperationRow = ({
     const backupOp = operation.operationBackup;
     let desc = `Backup at ${formatTime(operation.unixTimeStartMs!)}`;
     if (operation.status !== OperationStatus.STATUS_INPROGRESS) {
-      desc += ` and finished at ${formatTime(operation.unixTimeEndMs!)}`;
+      desc += ` completed in ${formatDuration(
+        parseInt(operation.unixTimeEndMs!) -
+          parseInt(operation.unixTimeStartMs!)
+      )}`;
     } else {
       desc += " and is still running.";
     }
@@ -273,5 +277,17 @@ const formatTime = (time: number | string) => {
   }
   const d = new Date();
   d.setTime(time);
-  return d.toLocaleString();
+  return d.toISOString();
+};
+
+const formatDuration = (ms: number) => {
+  const seconds = Math.floor(ms / 100) / 10;
+  const minutes = Math.floor(seconds / 60);
+  const hours = Math.floor(minutes / 60);
+  if (hours === 0 && minutes === 0) {
+    return `${seconds % 60}s`;
+  } else if (hours === 0) {
+    return `${minutes}m${seconds % 60}s`;
+  }
+  return `${hours}h${minutes % 60}m${seconds % 60}s`;
 };