diff --git a/client/client_test.go b/client/client_test.go
index 72958da..1daa008 100644
--- a/client/client_test.go
+++ b/client/client_test.go
@@ -2829,24 +2829,11 @@ func testMultipleUsers(t *testing.T, tester shellTester) {
 func createSyntheticImportEntries(t testing.TB, numSyntheticEntries int) {
 	homedir, err := os.UserHomeDir()
 	require.NoError(t, err)
-	filenames := []string{".bash_history", ".zsh_history", ".zhistory"}
-	numFiles := len(filenames) + 1 // The +1 accounts for the fish history file
-	for _, filename := range filenames {
-		f, err := os.OpenFile(path.Join(homedir, filename), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
-		require.NoError(t, err)
-		defer f.Close()
-		for i := 1; i <= numSyntheticEntries/numFiles; i++ {
-			_, err := f.WriteString(fmt.Sprintf("echo command-%s-%d\n", filename, i))
-			require.NoError(t, err)
-		}
-		require.NoError(t, f.Close())
-	}
-	// Write the file for fish too, in the special fish format
-	f, err := os.OpenFile(path.Join(homedir, ".local/share/fish/fish_history"), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	f, err := os.OpenFile(path.Join(homedir, ".bash_history"), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
 	require.NoError(t, err)
 	defer f.Close()
-	for i := 1; i <= numSyntheticEntries/numFiles; i++ {
-		_, err := f.WriteString(fmt.Sprintf("- cmd: echo command-fish-%d\n", i))
+	for i := 1; i <= numSyntheticEntries; i++ {
+		_, err := f.WriteString(fmt.Sprintf("echo command-%d\n", i))
 		require.NoError(t, err)
 	}
 	require.NoError(t, f.Close())
@@ -2881,6 +2868,32 @@ func TestImportHistory(t *testing.T) {
 	testutils.CompareGoldens(t, out, "TestImportHistory-export")
 }
 
+func BenchmarkImport(b *testing.B) {
+	b.StopTimer()
+	// Setup
+	tester := bashTester{}
+	defer testutils.BackupAndRestore(b)()
+
+	// Benchmark it
+	for n := 0; n < b.N; n++ {
+		// Setup
+		testutils.ResetLocalState(b)
+		installHishtory(b, tester, "")
+
+		// Create a large history in bash that we will pre-import
+		numSyntheticEntries := 100_000
+		createSyntheticImportEntries(b, numSyntheticEntries)
+
+		// Benchmarked code:
+		b.StartTimer()
+		ctx := hctx.MakeContext()
+		numImported, err := lib.ImportHistory(ctx, false, true)
+		require.NoError(b, err)
+		require.GreaterOrEqual(b, numImported, numSyntheticEntries)
+		b.StopTimer()
+	}
+}
+
 func TestAugmentedIsOfflineError(t *testing.T) {
 	defer testutils.BackupAndRestore(t)()
 	installHishtory(t, zshTester{}, "")
@@ -2897,30 +2910,4 @@ func TestAugmentedIsOfflineError(t *testing.T) {
 	require.True(t, lib.IsOfflineError(ctx, fmt.Errorf("unchecked error type")))
 }
 
-func BenchmarkImport(b *testing.B) {
-	b.StopTimer()
-	// Setup
-	tester := zshTester{}
-	defer testutils.BackupAndRestore(b)()
-
-	// Benchmark it
-	for n := 0; n < b.N; n++ {
-		// Setup
-		testutils.ResetLocalState(b)
-		installHishtory(b, tester, "")
-
-		// Create a large history in bash that we will pre-import
-		numSyntheticEntries := 1_000_000
-		createSyntheticImportEntries(b, numSyntheticEntries)
-
-		// Benchmarked code:
-		b.StartTimer()
-		ctx := hctx.MakeContext()
-		numImported, err := lib.ImportHistory(ctx, false, true)
-		require.NoError(b, err)
-		require.GreaterOrEqual(b, numImported, numSyntheticEntries)
-		b.StopTimer()
-	}
-}
-
 // TODO: somehow test/confirm that hishtory works even if only bash/only zsh is installed
diff --git a/client/lib/lib.go b/client/lib/lib.go
index 2b3aeb7..2358247 100644
--- a/client/lib/lib.go
+++ b/client/lib/lib.go
@@ -246,7 +246,6 @@ func countLinesInFiles(filenames ...string) (int, error) {
 		if err != nil {
 			return 0, err
 		}
-		hctx.GetLogger().Infof("Importing history entries, file=%#v contains %d lines", f, l)
 		total += l
 	}
 	return total, nil
@@ -704,7 +703,7 @@ func Reupload(ctx context.Context) error {
 		// in a single request (since large individual requests are extremely slow). From benchmarking,
 		// it is apparent that this value seems to work quite well.
 		uploadChunkSize := 500
-		chunks := shared.ChunksIter(entries, uploadChunkSize)
+		chunks := shared.Chunks(entries, uploadChunkSize)
 		err = shared.ForEach(chunks, 10, func(chunk []*data.HistoryEntry) error {
 			jsonValue, err := EncryptAndMarshal(config, chunk)
 			if err != nil {
diff --git a/shared/data.go b/shared/data.go
index 292fa3c..5cd5aef 100644
--- a/shared/data.go
+++ b/shared/data.go
@@ -122,20 +122,3 @@ func Chunks[k any](slice []k, chunkSize int) [][]k {
 	}
 	return chunks
 }
-
-type Seq1[K any] func(yield func(K) bool) bool
-
-func ChunksIter[k any](slice []k, chunkSize int) Seq1[[]k] {
-	return func(yield func([]k) bool) bool {
-		for i := 0; i < len(slice); i += chunkSize {
-			end := i + chunkSize
-			if end > len(slice) {
-				end = len(slice)
-			}
-			if !yield(slice[i:end]) {
-				return false
-			}
-		}
-		return true
-	}
-}
diff --git a/shared/utils.go b/shared/utils.go
index 37c210c..1c4b1f7 100644
--- a/shared/utils.go
+++ b/shared/utils.go
@@ -2,12 +2,14 @@ package shared
 
 import "sync"
 
-func ForEach[T any](iter Seq1[T], numThreads int, fn func(T) error) error {
+func ForEach[T any](arr []T, numThreads int, fn func(T) error) error {
 	wg := &sync.WaitGroup{}
+	wg.Add(len(arr))
+
 	limiter := make(chan bool, numThreads)
+
 	var errors []error
-	iter(func(item T) bool {
-		wg.Add(1)
+	for _, item := range arr {
 		limiter <- true
 		go func(x T) {
 			defer wg.Done()
@@ -17,8 +19,11 @@ func ForEach[T any](iter Seq1[T], numThreads int, fn func(T) error) error {
 			}
 			<-limiter
 		}(item)
-		return true
-	})
+		if len(errors) > 0 {
+			return errors[0]
+		}
+	}
+
 	wg.Wait()
 	if len(errors) > 0 {
 		return errors[0]