Add bench step

.gitlab-ci.yml

@@ -12,6 +12,7 @@ variables:
 stages:
   - stack
   - cabal
+  - bench
   - test
 
 stack:
@@ -37,6 +38,18 @@ cabal:
     - nix-shell --run "./bin/update-cabal-project $CABAL_STORE_DIR && cabal --store-dir=$CABAL_STORE_DIR v2-build --ghc-options='-O0 -fclear-plugins'"
   allow_failure: false
 
+bench:
+  stage: bench
+  cache:
+    key: cabal.project
+    paths:
+      - dist-newstyle/
+      - .cabal/
+    policy: pull-push
+  script:
+    - nix-shell --run "cabal --store-dir=$CABAL_STORE_DIR v2-bench --ghc-options='-fclear-plugins'"
+  allow_failure: false
+
 test:
   stage: test
   cache: