diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 35dda6c3cf..bfa140a920 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,15 +8,12 @@ on:
     paths-ignore:
       - "**.md"
 
-jobs:
-  no-scheduling:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Dont schedule all jobs
-        run: sleep 10
+concurrency:
+  group: build-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
 
+jobs:
   code-formatting-perf-regressions:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 15
     env:
@@ -47,7 +44,6 @@ jobs:
         run: cmd/tools/repeat --max_time 1501 --series 3 --count 20 --nmins 2 --nmaxs 5 --warmup 3 --fail_percent 10 -t 'cd {T} ; ./v -show-timings -o v.c cmd/v' . ./vmaster
 
   ubuntu-tcc:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 121
     env:
@@ -115,7 +111,6 @@ jobs:
         run: cd cmd/tools/fast && ../../../v fast.v && ./fast
 
   ubuntu-tcc-boehm-gc:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 121
     env:
@@ -170,7 +165,6 @@ jobs:
           [ "$(stat -c %s leaks.txt)" = "0" ]
 
   misc-tooling:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 121
     env:
@@ -223,7 +217,6 @@ jobs:
 
 
   alpine-docker-musl-gcc:
-    needs: no-scheduling
     name: alpine-musl
     runs-on: ubuntu-20.04
     timeout-minutes: 121
@@ -255,7 +248,6 @@ jobs:
         run: ./v -silent test-self
 
   macos:
-    needs: no-scheduling
     runs-on: macOS-latest
     timeout-minutes: 121
     env:
@@ -346,7 +338,6 @@ jobs:
           ## ../v run examples/build_examples.vsh
 
   ubuntu:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 121
     steps:
@@ -442,7 +433,6 @@ jobs:
   #        github-token: ${{ secrets.GITHUB_TOKEN }}
 
   ubuntu-clang:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 121
     env:
@@ -538,7 +528,6 @@ jobs:
 
   # Ubuntu docker pre-built container
   ubuntu-musl:
-    needs: no-scheduling
     name: ubuntu-musl
     runs-on: ubuntu-20.04
     timeout-minutes: 121
@@ -591,7 +580,6 @@ jobs:
   #       run: ./v -silent test-self
 
   windows-gcc:
-    needs: no-scheduling
     runs-on: windows-2019
     timeout-minutes: 121
     env:
@@ -634,7 +622,6 @@ jobs:
         run: .\v.exe -o v2.exe cmd/v && .\v2.exe -o v3.exe cmd/v
 
   windows-msvc:
-    needs: no-scheduling
     runs-on: windows-2019
     timeout-minutes: 121
     env:
@@ -678,7 +665,6 @@ jobs:
         run: .\v.exe -o v2.exe cmd/v && .\v2.exe -o v3.exe cmd/v
 
   windows-tcc:
-    needs: no-scheduling
     runs-on: windows-2019
     timeout-minutes: 121
     env:
@@ -777,7 +763,6 @@ jobs:
         ##        run: .\v.exe -o v2.exe cmd/v && .\v2.exe -o v3.exe cmd/v
 
   parser-silent:
-    needs: no-scheduling
     name: Parser silent mode
     runs-on: ubuntu-20.04
     timeout-minutes: 121
@@ -817,7 +802,6 @@ jobs:
           ./v test-parser -S examples/2048/2048_fuzz.v
 
   v-apps-compile:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 121
     steps:
diff --git a/.github/workflows/ci_sanitized.yml b/.github/workflows/ci_sanitized.yml
index 89c0655e85..9bd61f2f2c 100644
--- a/.github/workflows/ci_sanitized.yml
+++ b/.github/workflows/ci_sanitized.yml
@@ -53,15 +53,12 @@ on:
       - 'vlib/v/preludes/**.v'
       - 'vlib/v/embed_file/**.v'
 
-jobs:
-  no-scheduling:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Dont schedule all jobs
-        run: sleep 10
+concurrency:
+  group: build-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
 
+jobs:
   tests-sanitize-undefined-clang:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 180
     env:
@@ -87,7 +84,6 @@ jobs:
         run: ./v2 build-examples
 
   tests-sanitize-undefined-gcc:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 180
     env:
@@ -112,7 +108,6 @@ jobs:
         run: ./v2 build-examples
 
   tests-sanitize-address-clang:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 180
     env:
@@ -142,7 +137,6 @@ jobs:
         run: ASAN_OPTIONS=detect_leaks=0 ./v build-examples
 
   tests-sanitize-address-msvc:
-    needs: no-scheduling
     runs-on: windows-2019
     timeout-minutes: 180
     env:
@@ -169,7 +163,6 @@ jobs:
       ##          .\v.exe -cflags "/fsanitize=address" test-self
 
   tests-sanitize-address-gcc:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 180
     env:
@@ -199,7 +192,6 @@ jobs:
         run: ASAN_OPTIONS=detect_leaks=0 ./v build-examples
 
   tests-sanitize-memory-clang:
-    needs: no-scheduling
     runs-on: ubuntu-20.04
     timeout-minutes: 180
     env: