Speed up clear()

[dbsrgits/DBM-Deep.git] / lib / DBM / Deep / Hash.pm

diff --git a/lib/DBM/Deep/Hash.pm b/lib/DBM/Deep/Hash.pm
index 6b43d96..3188dd1 100644 (file)
--- a/lib/DBM/Deep/Hash.pm
+++ b/lib/DBM/Deep/Hash.pm
@@ -111,12 +111,24 @@ sub NEXTKEY {
 sub first_key { (shift)->FIRSTKEY(@_) }
 sub next_key { (shift)->NEXTKEY(@_) }
 
+sub _clear {
+    my $self = shift;
+
+    while ( defined(my $key = $self->first_key) ) {
+      do {
+        $self->_engine->delete_key( $self, $key, $key );
+      } while defined($key = $self->next_key($key));
+    }
+
+    return;
+}
+
 sub _copy_node {
     my $self = shift;
     my ($db_temp) = @_;
 
     my $key = $self->first_key();
-    while ($key) {
+    while (defined $key) {
         my $value = $self->get($key);
         $self->_copy_value( \$db_temp->{$key}, $value );
         $key = $self->next_key($key);