diff --git a/internal/gitclone/manager.go b/internal/gitclone/manager.go
index 49d0ba7..790e5e3 100644
--- a/internal/gitclone/manager.go
+++ b/internal/gitclone/manager.go
@@ -366,7 +366,7 @@ func mirrorConfigSettings() [][2]string {
 		// Disable auto GC
 		{"gc.auto", "0"},
 		// Pack performance
-		{"pack.threads", "0"},
+		{"pack.threads", "4"},
 		{"pack.deltaCacheSize", "512m"},
 		{"pack.windowMemory", "1g"},
 	}
diff --git a/internal/jobscheduler/jobs.go b/internal/jobscheduler/jobs.go
index 3db0e6c..501db28 100644
--- a/internal/jobscheduler/jobs.go
+++ b/internal/jobscheduler/jobs.go
@@ -13,7 +13,7 @@ import (
 )
 
 type Config struct {
-	Concurrency int    `hcl:"concurrency" help:"The maximum number of concurrent jobs to run (0 means number of cores)." default:"0"`
+	Concurrency int    `hcl:"concurrency" help:"The maximum number of concurrent jobs to run (0 means number of cores)." default:"4"`
 	SchedulerDB string `hcl:"scheduler-db" help:"Path to the scheduler state database." default:"${CACHEW_STATE}/scheduler.db"`
 }
 
diff --git a/internal/snapshot/snapshot.go b/internal/snapshot/snapshot.go
index 2e8f5bb..58fa8da 100644
--- a/internal/snapshot/snapshot.go
+++ b/internal/snapshot/snapshot.go
@@ -45,7 +45,7 @@ func Create(ctx context.Context, remote cache.Cache, key cache.Key, directory st
 	tarArgs = append(tarArgs, ".")
 
 	tarCmd := exec.CommandContext(ctx, "tar", tarArgs...)
-	zstdCmd := exec.CommandContext(ctx, "zstd", "-c", "-T0")
+	zstdCmd := exec.CommandContext(ctx, "zstd", "-c", "-T4")
 
 	tarStdout, err := tarCmd.StdoutPipe()
 	if err != nil {
@@ -102,7 +102,7 @@ func Restore(ctx context.Context, remote cache.Cache, key cache.Key, directory s
 		return errors.Wrap(err, "failed to create target directory")
 	}
 
-	zstdCmd := exec.CommandContext(ctx, "zstd", "-dc", "-T0")
+	zstdCmd := exec.CommandContext(ctx, "zstd", "-dc", "-T4")
 	tarCmd := exec.CommandContext(ctx, "tar", "-xpf", "-", "-C", directory)
 
 	zstdCmd.Stdin = rc