diff --git a/frontend/dev/bench.cljs b/frontend/dev/bench.cljs
new file mode 100644
index 000000000..cf2a40632
--- /dev/null
+++ b/frontend/dev/bench.cljs
@@ -0,0 +1,48 @@
+(ns bench
+  (:require
+   [app.common.data :as d]
+   [app.common.geom.point :as gpt]
+   [app.common.geom.shapes.rect :as gsr]
+   [app.common.perf :as perf]
+   [clojure.spec.alpha :as s]
+   [clojure.test.check.generators :as gen]))
+
+(def points
+  (gen/sample (s/gen ::gpt/point) 20))
+
+(defn points->rect
+  [points]
+  (when-let [points (seq points)]
+    (loop [minx ##Inf
+           miny ##Inf
+           maxx ##-Inf
+           maxy ##-Inf
+           pts  points]
+      (if-let [pt ^boolean (first pts)]
+        (let [x (d/get-prop pt :x)
+              y (d/get-prop pt :y)]
+          (recur (min minx x)
+                 (min miny y)
+                 (max maxx x)
+                 (max maxy y)
+                 (rest pts)))
+        (when (d/num? minx miny maxx maxy)
+          (gsr/make-rect minx miny (- maxx minx) (- maxy miny)))))))
+
+(defn bench-points
+  []
+  (perf/benchmark
+   :f #(gsr/points->rect points)
+   :name "base")
+  (perf/benchmark
+   :f #(points->rect points)
+   :name "optimized"))
+
+
+(defn main
+  [& [name]]
+  (case name
+    "points" (bench-points)
+    (println "available: points")))
+
+
diff --git a/frontend/shadow-cljs.edn b/frontend/shadow-cljs.edn
index dd5285eac..bb641ad0c 100644
--- a/frontend/shadow-cljs.edn
+++ b/frontend/shadow-cljs.edn
@@ -69,10 +69,10 @@
   {:target :node-script
    :output-to "target/bench.js"
    :output-dir "target/bench/"
-   :main cljs.user/main
+   :main bench/main
 
    :compiler-options
-   {:output-feature-set :es8
+   {:output-feature-set :es2020
     :output-wrapper false
     :warnings {:fn-deprecated false}}