diff --git a/Changes b/Changes
index 685e064..007ff8f 100644
--- a/Changes
+++ b/Changes
@@ -1,4 +1,4 @@
-  - increase TO_JSON performance by 17% on bitfields and 70% on range based
+  - increase TO_JSON performance by 2x on bitfields and 26x on range based vendor section
   - add json section 'publisher' and include all publisher restriction, if any, per purpose id, vendor id and restriction type
 
 0.081
diff --git a/lib/GDPR/IAB/TCFv2.pm b/lib/GDPR/IAB/TCFv2.pm
index c722ea7..359d1e2 100644
--- a/lib/GDPR/IAB/TCFv2.pm
+++ b/lib/GDPR/IAB/TCFv2.pm
@@ -398,14 +398,9 @@ sub TO_JSON {
             ),
         },
         vendor => {
-            consents => $self->_format_json_subsection2(
-                $self->{vendor_consents}->all,
-                $self->max_vendor_id_consent,
-            ),
-            legitimate_interests => $self->_format_json_subsection2(
-                $self->{vendor_legitimate_interests}->all,
-                $self->max_vendor_id_legitimate_interest,
-            ),
+            consents             => $self->{vendor_consents}->TO_JSON,
+            legitimate_interests =>
+              $self->{vendor_legitimate_interests}->TO_JSON,
         },
         publisher => {
             restrictions => $self->{publisher_restrictions}->TO_JSON,
diff --git a/lib/GDPR/IAB/TCFv2/BitField.pm b/lib/GDPR/IAB/TCFv2/BitField.pm
index 01b8bb8..1fa254b 100644
--- a/lib/GDPR/IAB/TCFv2/BitField.pm
+++ b/lib/GDPR/IAB/TCFv2/BitField.pm
@@ -65,10 +65,47 @@ sub all {
 
     my @data = split //, $self->{data};
 
+    return [ grep { $data[ $_ - 1 ] } 1 .. $self->{max_vendor_id} ];
+}
+
+sub TO_JSON {
+    my $self = shift;
+
+    my @data = split //, $self->{data};
+
+    if ( !!$self->{options}->{json}->{compact} ) {
+        return [ grep { $data[ $_ - 1 ] } 1 .. $self->{max_vendor_id} ];
+    }
+
     my ( $false, $true ) = @{ $self->{options}->{json}->{boolean_values} };
 
-    return { map { $_ => $data[ $_ - 1 ] ? $true : $false }
-          1 .. $self->{max_vendor_id} };
+    if ( !!$self->{options}->{json}->{verbose} ) {
+        return { map { $_ => $data[ $_ - 1 ] ? $true : $false }
+              1 .. $self->{max_vendor_id} };
+    }
+
+    return {
+        map  { $_ => $true }
+        grep { $data[ $_ - 1 ] } 1 .. $self->{max_vendor_id}
+    };
+}
+
+sub _format_json_subsection2 {
+    my ( $self, $data, $max ) = @_;
+
+    my ( $false, $true ) = @{ $self->{options}->{json}->{boolean_values} };
+
+    if ( !!$self->{options}->{json}->{compact} ) {
+        return [
+            grep { $data->{$_} } 1 .. $max,
+        ];
+    }
+
+    my $verbose = !!$self->{options}->{json}->{verbose};
+
+    return $data if $verbose;
+
+    return { map { $_ => $true } grep { $data->{$_} } keys %{$data} };
 }
 
 1;
@@ -117,4 +154,4 @@ Returns the max vendor id.
 
 =head2 all
 
-Returns an hashref of all vendors mapped to the bit enable (returns true or false).
+Returns an array of all vendors mapped with the bit enabled.
diff --git a/lib/GDPR/IAB/TCFv2/PublisherRestrictions.pm b/lib/GDPR/IAB/TCFv2/PublisherRestrictions.pm
index 2164d1c..be3f6cb 100644
--- a/lib/GDPR/IAB/TCFv2/PublisherRestrictions.pm
+++ b/lib/GDPR/IAB/TCFv2/PublisherRestrictions.pm
@@ -42,7 +42,7 @@ sub TO_JSON {
         foreach my $restrict_type ( keys %{$restriction_map} ) {
             my $vendors = $restriction_map->{$restrict_type}->all;
 
-            foreach my $vendor ( grep { $vendors->{$_} } keys %{$vendors} ) {
+            foreach my $vendor ( @{$vendors} ) {
                 $purpose_restrictions{$vendor} = int($restrict_type);
             }
         }
diff --git a/lib/GDPR/IAB/TCFv2/RangeConsent.pm b/lib/GDPR/IAB/TCFv2/RangeConsent.pm
index 7998311..a11ef26 100644
--- a/lib/GDPR/IAB/TCFv2/RangeConsent.pm
+++ b/lib/GDPR/IAB/TCFv2/RangeConsent.pm
@@ -46,6 +46,18 @@ sub all {
 
     my ( $false, $true ) = @{ $self->{options}->{json}->{boolean_values} };
 
+    return [ $self->{start} .. $self->{end} ];
+}
+
+sub TO_JSON {
+    my $self = shift;
+
+    if ( !!$self->{options}->{json}->{compact} ) {
+        return [ $self->{start} .. $self->{end} ];
+    }
+
+    my ( $false, $true ) = @{ $self->{options}->{json}->{boolean_values} };
+
     return { map { $_ => $true } $self->{start} .. $self->{end} };
 }
 
@@ -83,4 +95,4 @@ Return true if the id is present on the range [start, end]
 
 =head2 all
 
-Returns an hashref of all vendors mapped to the bit enable (returns true or false).
+Returns an arrayref of all vendors mapped with the bit enabled (or all vendors in range).
diff --git a/lib/GDPR/IAB/TCFv2/RangeSection.pm b/lib/GDPR/IAB/TCFv2/RangeSection.pm
index 9350b61..7732922 100644
--- a/lib/GDPR/IAB/TCFv2/RangeSection.pm
+++ b/lib/GDPR/IAB/TCFv2/RangeSection.pm
@@ -125,12 +125,37 @@ sub contains {
 sub all {
     my $self = shift;
 
+    my @vendors;
+    foreach my $range_consent ( @{ $self->{range_consents} } ) {
+        push @vendors, @{ $range_consent->all };
+    }
+
+    return \@vendors;
+}
+
+sub TO_JSON {
+    my $self = shift;
+
+    if ( !!$self->{options}->{json}->{compact} ) {
+        my @vendors;
+
+        foreach my $range_consent ( @{ $self->{range_consents} } ) {
+            push @vendors, @{ $range_consent->TO_JSON }
+              ;    # todo use all when we convert back to arrayref
+        }
+
+        return \@vendors;
+    }
+
     my ( $false, $true ) = @{ $self->{options}->{json}->{boolean_values} };
 
-    my %map = map { $_ => $false } 1 .. $self->{max_vendor_id};
+    my %map;
+    if ( !!$self->{options}->{json}->{verbose} ) {
+        %map = map { $_ => $false } 1 .. $self->{max_vendor_id};
+    }
 
     foreach my $range_consent ( @{ $self->{range_consents} } ) {
-        %map = ( %map, %{ $range_consent->all } );
+        %map = ( %map, %{ $range_consent->TO_JSON } );
     }
 
     return \%map;
@@ -185,6 +210,6 @@ Returns the max vendor id.
 
 =head2 all
 
-Returns an hashref of all vendors mapped to the bit enable (returns true or false).
+Returns an arrayref of all vendors mapped with the bit enabled.
 
 It is a combination of all the responses of L<GDPR::IAB::TCFv2::RangeConsent#all>.
diff --git a/t/00-load.t b/t/00-load.t
index a5c11bb..d9bd1ce 100644
--- a/t/00-load.t
+++ b/t/00-load.t
@@ -30,15 +30,15 @@ subtest "check interfaces" => sub {
     isa_ok 'GDPR::IAB::TCFv2::Constants::SpecialFeature',  'Exporter';
     isa_ok 'GDPR::IAB::TCFv2::Constants::RestrictionType', 'Exporter';
 
-    my @methods = qw<Parse max_vendor_id contains all>;
+    my @methods = qw<Parse max_vendor_id contains all TO_JSON>;
 
     can_ok 'GDPR::IAB::TCFv2::BitField',     @methods;
     can_ok 'GDPR::IAB::TCFv2::RangeSection', @methods;
 
-    can_ok 'GDPR::IAB::TCFv2::RangeConsent', 'new', 'contains', 'all';
+    can_ok 'GDPR::IAB::TCFv2::RangeConsent', qw<new contains all TO_JSON>;
 
-    can_ok 'GDPR::IAB::TCFv2::PublisherRestrictions', 'new',
-      'check_publisher_restriction', 'TO_JSON';
+    can_ok 'GDPR::IAB::TCFv2::PublisherRestrictions',
+      qw<new check_publisher_restriction TO_JSON>;
 
     done_testing;
 };