diff --git a/README.md b/README.md
index 566d65b3..c237ec7a 100644
--- a/README.md
+++ b/README.md
@@ -156,6 +156,35 @@ This project is a fork of [zrepl](https://github.com/zrepl/zrepl).
     type: "cron" still works too, just for compatibility. Both of them is the
     same type.
 
+  * Fast skip "keep all" pruning.
+
+    Instead of configuration like this:
+
+    ``` yaml
+    pruning:
+      keep:
+        - type: "regex"
+          regex: ".*"
+    ```
+
+    or like this:
+
+    ``` yaml
+    pruning:
+      keep_sender:
+        - type: "regex"
+          regex: ".*"
+      keep_receiver:
+    ```
+
+    which keeps all snapshots, now it's possible to omit `pruning:` at all, or
+    one of `keep_sender:` or `keep_receiver:`. In this case zrepl will early
+    abort pruning and mark it as done.
+
+    Originally zrepl requests all snapshots and does nothing after that, because
+    pruning configured to keep all snapshots, but anyway it spends some time
+    executing zfs commands.
+
   * Small cosmetic changes
 
 ## User Documentation
diff --git a/config/config.go b/config/config.go
index 15d6c271..037d10e4 100644
--- a/config/config.go
+++ b/config/config.go
@@ -103,7 +103,7 @@ type PassiveJob struct {
 type SnapJob struct {
 	Type             string            `yaml:"type"`
 	Name             string            `yaml:"name"`
-	Pruning          PruningLocal      `yaml:"pruning"`
+	Pruning          PruningLocal      `yaml:"pruning,optional"`
 	Snapshotting     SnapshottingEnum  `yaml:"snapshotting"`
 	Filesystems      FilesystemsFilter `yaml:"filesystems"`
 	MonitorSnapshots MonitorSnapshots  `yaml:"monitor,optional"`
@@ -266,8 +266,8 @@ type SnapshottingManual struct {
 }
 
 type PruningSenderReceiver struct {
-	KeepSender   []PruningEnum `yaml:"keep_sender"`
-	KeepReceiver []PruningEnum `yaml:"keep_receiver"`
+	KeepSender   []PruningEnum `yaml:"keep_sender,optional"`
+	KeepReceiver []PruningEnum `yaml:"keep_receiver,optional"`
 }
 
 type PruningLocal struct {
diff --git a/daemon/pruner/pruner.go b/daemon/pruner/pruner.go
index 9c2e7d0f..45b184c5 100644
--- a/daemon/pruner/pruner.go
+++ b/daemon/pruner/pruner.go
@@ -212,6 +212,12 @@ func (s State) IsTerminal() bool {
 type updater func(func(*Pruner))
 
 func (p *Pruner) Prune() {
+	if len(p.args.rules) == 0 {
+		l := GetLogger(p.args.ctx)
+		l.Info("skip pruning, because no keep rules configured")
+		p.state = Done
+		return
+	}
 	p.prune(p.args)
 }