fix: sync slow issue caused by unnecessary traversals

pkg/skaffold/docker/dependencies.go

@@ -134,6 +134,8 @@ func getDependencies(ctx context.Context, workspace string, dockerfilePath strin
 	}
 
 	excludes, err := readDockerignore(workspace, absDockerfilePath)
+	fmt.Println("ignore....")
+	fmt.Println(excludes)
 	if err != nil {
 		return nil, fmt.Errorf("reading .dockerignore: %w", err)
 	}
@@ -144,6 +146,8 @@ func getDependencies(ctx context.Context, workspace string, dockerfilePath strin
 	}
 
 	files, err := WalkWorkspace(workspace, excludes, deps)
+	fmt.Println("monitored")
+	fmt.Println(files)
 	if err != nil {
 		return nil, fmt.Errorf("walking workspace: %w", err)
 	}
@@ -260,6 +264,10 @@ func WalkWorkspace(workspace string, excludes, deps []string) (map[string]bool,
 			if err != nil {
 				return false, err
 			}
+			// see the comment on walk.Do
+			if info.IsDir() && ignored {
+				return false, filepath.SkipDir
+			}
 			return !ignored, nil
 		}
 

pkg/skaffold/docker/syncmap.go

@@ -88,6 +88,10 @@ func walkWorkspaceWithDestinations(workspace string, excludes []string, fts []Fr
 				if err != nil {
 					return false, err
 				}
+				// see the comment on walk.Do
+				if ignored {
+					return false, filepath.SkipDir
+				}
 
 				return !ignored, nil
 			}