diff --git a/backend/src/main/java/com/bakdata/conquery/apiv1/FilterSearch.java b/backend/src/main/java/com/bakdata/conquery/apiv1/FilterSearch.java
index c0c94c343c..0339f0d2b6 100644
--- a/backend/src/main/java/com/bakdata/conquery/apiv1/FilterSearch.java
+++ b/backend/src/main/java/com/bakdata/conquery/apiv1/FilterSearch.java
@@ -26,14 +26,18 @@
 import com.bakdata.conquery.models.jobs.SimpleJob;
 import com.bakdata.conquery.util.search.TrieSearch;
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.google.common.base.Functions;
 import com.google.common.collect.Sets;
-import lombok.Value;
+import it.unimi.dsi.fastutil.objects.Object2LongAVLTreeMap;
+import it.unimi.dsi.fastutil.objects.Object2LongMap;
+import it.unimi.dsi.fastutil.objects.Object2LongMaps;
+import lombok.Data;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.time.StopWatch;
 
 
 @Slf4j
-@Value
+@Data
 public class FilterSearch {
 
 	private final NamespaceStorage storage;
@@ -48,6 +52,7 @@ public class FilterSearch {
 	 */
 	@JsonIgnore
 	private final Map<Searchable, TrieSearch<FEValue>> searchCache = new HashMap<>();
+	private Object2LongMap<SelectFilter<?>> totals = Object2LongMaps.emptyMap();
 
 	/**
 	 * From a given {@link FEValue} extract all relevant keywords.
@@ -75,6 +80,10 @@ public List<TrieSearch<FEValue>> getSearchesFor(SelectFilter<?> filter) {
 					 .collect(Collectors.toList());
 	}
 
+	public long getTotal(SelectFilter<?> filter) {
+		return totals.getOrDefault(filter, 0);
+	}
+
 
 	/**
 	 * Scan all SelectFilters and submit {@link SimpleJob}s to create interactive searches for them.
@@ -159,6 +168,23 @@ public void updateSearch() {
 						log.debug("Still waiting for {} to finish.", Sets.difference(collectedSearchables, synchronizedResult.keySet()));
 					}
 
+					log.debug("BEGIN counting Search totals.");
+
+
+					// Precompute totals as that can be extremly slow.
+					totals = new Object2LongAVLTreeMap<>(
+							allSelectFilters.parallelStream()
+											.collect(Collectors.toMap(
+													Functions.identity(),
+													filter -> filter.getSearchReferences().stream()
+																	.map(synchronizedResult::get)
+																	.flatMap(TrieSearch::stream)
+																	.mapToInt(FEValue::hashCode)
+																	.distinct()
+																	.count()
+											)));
+
+
 					log.debug("DONE loading SourceSearch");
 				}
 		));
diff --git a/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java b/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java
index 4611bee134..88efe59c87 100644
--- a/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java
+++ b/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java
@@ -15,9 +15,8 @@
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
-import javax.validation.Validator;
-
 import javax.inject.Inject;
+import javax.validation.Validator;
 
 import com.bakdata.conquery.apiv1.IdLabel;
 import com.bakdata.conquery.apiv1.frontend.FEList;
@@ -54,7 +53,6 @@
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.Getter;
-import lombok.NoArgsConstructor;
 import lombok.RequiredArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
@@ -273,10 +271,7 @@ private long countAllValues(SelectFilter<?> filter) {
 		final Namespace namespace = namespaces.get(filter.getDataset().getId());
 
 
-		return namespace.getFilterSearch()
-						.getSearchesFor(filter).stream()
-						.mapToLong(TrieSearch::calculateSize)
-						.sum();
+		return namespace.getFilterSearch().getTotal(filter);
 	}
 
 	/**
diff --git a/docs/REST API JSONs.md b/docs/REST API JSONs.md
index ba5d5289a6..d9857c8d23 100644
--- a/docs/REST API JSONs.md	
+++ b/docs/REST API JSONs.md	
@@ -1297,7 +1297,7 @@ Supported Fields:
 | [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/apiv1/ExecutionStatus.java#L25) | tags | list of `String` | `null` |  |  | 
 </p></details>
 
-### Type ResolvedConceptsResult<sup><sub><sup> [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L359)</sup></sub></sup>
+### Type ResolvedConceptsResult<sup><sub><sup> [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L354)</sup></sub></sup>
 
 
 <details><summary>Details</summary><p>
@@ -1308,12 +1308,12 @@ Supported Fields:
 
 |  | Field | Type | Default | Example | Description |
 | --- | --- | --- | --- | --- | --- |
-| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L364) | resolvedConcepts | `Set<ConceptElementId<?>>` | ? |  |  | 
-| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L365) | resolvedFilter | [ResolvedFilterResult](#Type-ResolvedFilterResult) | ? |  |  | 
-| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L366) | unknownCodes | `Collection<String>` | ? |  |  | 
+| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L359) | resolvedConcepts | `Set<ConceptElementId<?>>` | ? |  |  | 
+| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L360) | resolvedFilter | [ResolvedFilterResult](#Type-ResolvedFilterResult) | ? |  |  | 
+| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L361) | unknownCodes | `Collection<String>` | ? |  |  | 
 </p></details>
 
-### Type ResolvedFilterResult<sup><sub><sup> [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L349)</sup></sub></sup>
+### Type ResolvedFilterResult<sup><sub><sup> [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L344)</sup></sub></sup>
 
 
 <details><summary>Details</summary><p>
@@ -1324,9 +1324,9 @@ Supported Fields:
 
 |  | Field | Type | Default | Example | Description |
 | --- | --- | --- | --- | --- | --- |
-| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L355) | filterId | ID of `Filter` | ? |  |  | 
-| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L354) | tableId | ID of `Connector` | ? |  |  | 
-| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L356) | value | `Collection<FEValue>` | ? |  |  | 
+| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L350) | filterId | ID of `Filter` | ? |  |  | 
+| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L349) | tableId | ID of `Connector` | ? |  |  | 
+| [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/resources/api/ConceptsProcessor.java#L351) | value | `Collection<FEValue>` | ? |  |  | 
 </p></details>
 
 ### Type ValidityDateContainer<sup><sub><sup> [✎](https://github.com/bakdata/conquery/edit/develop/backend/src/main/java/com/bakdata/conquery/apiv1/query/concept/filter/ValidityDateContainer.java#L9)</sup></sub></sup>