Merge branch 'main' into popzxc-rework-locate-workspace

.github/workflows/ci-zk-toolbox-reusable.yml

@@ -4,14 +4,19 @@ on:
 
 env:
   CLICOLOR: 1
+  # We run multiple binaries in parallel, and by default they will try to utilize all the
+  # available CPUs. In tests, there is not much CPU-intensive work (rayon), but a lot of
+  # async work (tokio), so we prioritize tokio.
+  TOKIO_WORKER_THREADS: 4
+  RAYON_NUM_THREADS: 2
 
 jobs:
   lint:
     name: lint
     uses: ./.github/workflows/ci-core-lint-reusable.yml
 
   tests:
-    runs-on: [ matterlabs-ci-runner ]
+    runs-on: [ matterlabs-ci-runner-ultra-performance ]
     steps:
       - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
         with: