diff --git a/backend/zeno_backend/classes/metric.py b/backend/zeno_backend/classes/metric.py
index d5727d3d..308cd142 100644
--- a/backend/zeno_backend/classes/metric.py
+++ b/backend/zeno_backend/classes/metric.py
@@ -18,6 +18,14 @@ class Metric(CamelModel):
     type: str
     columns: list[str]
 
+    def __hash__(self):
+        """Hash representation of metric, based on id since guaranteed unique.
+
+        Returns:
+            int: the hash of the metric.
+        """
+        return self.id
+
 
 class MetricKey(CamelModel):
     """Specification of metric keys in zeno.
diff --git a/backend/zeno_backend/processing/metrics/map.py b/backend/zeno_backend/processing/metrics/map.py
index dae43e58..657ae7bd 100644
--- a/backend/zeno_backend/processing/metrics/map.py
+++ b/backend/zeno_backend/processing/metrics/map.py
@@ -1,5 +1,7 @@
 """Map metric names to metric functions."""
 
+from functools import lru_cache
+
 from psycopg import sql
 
 from zeno_backend.classes.base import GroupMetric
@@ -51,6 +53,7 @@ def count(
         )
 
 
+@lru_cache(maxsize=4096)
 def metric_map(
     metric: Metric | None,
     project: str,