From 0293b1a0cd6deb04d8c4e4e2840e50d6b838e692 Mon Sep 17 00:00:00 2001
From: Thomas <thomas.schneider@datadoghq.com>
Date: Fri, 8 May 2026 16:43:07 -0400
Subject: [PATCH 1/2] chore(ci): centralize CARGO_INCREMENTAL=0 in setup action

---
 .github/actions/setup/action.yml        | 2 ++
 .github/workflows/coverage.yml          | 1 -
 .github/workflows/k8s_e2e.yml           | 5 -----
 .github/workflows/test-make-command.yml | 1 -
 .github/workflows/unit-tests.yml        | 1 -
 .github/workflows/unit_mac.yml          | 2 --
 6 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/.github/actions/setup/action.yml b/.github/actions/setup/action.yml
index 3c7e645e6831b..4e0ee71078b05 100644
--- a/.github/actions/setup/action.yml
+++ b/.github/actions/setup/action.yml
@@ -142,6 +142,8 @@ runs:
           echo "RUST_BACKTRACE=full" >> "$GITHUB_ENV"
           # Set nice CI colors
           echo "CARGO_TERM_COLOR=always" >> "$GITHUB_ENV"
+          # Incremental compilation is useless in CI: no state is shared between runs
+          echo "CARGO_INCREMENTAL=0" >> "$GITHUB_ENV"
         fi
 
     - name: Enable rust matcher
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 5af2787d2b90f..a07ec850373a4 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -28,7 +28,6 @@ permissions:
   contents: read
 
 env:
-  CARGO_INCREMENTAL: "0" # Disable incremental compilation for coverage
   CI: true
 
 jobs:
diff --git a/.github/workflows/k8s_e2e.yml b/.github/workflows/k8s_e2e.yml
index 53f811f0a2a35..49c725e04fd4e 100644
--- a/.github/workflows/k8s_e2e.yml
+++ b/.github/workflows/k8s_e2e.yml
@@ -72,10 +72,6 @@ jobs:
     if: ${{ !failure() && !cancelled() && github.event_name != 'pull_request' && needs.changes.outputs.website_only != 'true' && needs.changes.outputs.k8s != 'false' }}
     # cargo-deb requires a release build, but we don't need optimizations for tests
     env:
-      CARGO_PROFILE_RELEASE_OPT_LEVEL: 0
-      CARGO_PROFILE_RELEASE_LTO: thin # fat LTO OOMs/timeouts on standard 16GB runners; thin is sufficient to verify linking
-      CARGO_PROFILE_RELEASE_CODEGEN_UNITS: 256
-      CARGO_INCREMENTAL: 0
       DISABLE_MOLD: true
     steps:
       - name: Checkout branch
@@ -211,7 +207,6 @@ jobs:
         env:
           USE_MINIKUBE_CACHE: "true"
           SKIP_PACKAGE_DEB: "true"
-          CARGO_INCREMENTAL: 0
           HELM_CHART_REPO: ${{ github.workspace }}/helm-charts/charts/vector
         with:
           timeout_minutes: 45
diff --git a/.github/workflows/test-make-command.yml b/.github/workflows/test-make-command.yml
index 2a93f9016fcd1..b0a5e9aa6b4aa 100644
--- a/.github/workflows/test-make-command.yml
+++ b/.github/workflows/test-make-command.yml
@@ -37,7 +37,6 @@ jobs:
       id-token: write
     timeout-minutes: 90
     env:
-      CARGO_INCREMENTAL: 0
       DD_ENV: "ci"
     steps:
       - name: Checkout branch
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 3f95e9262a21f..b6bf76de5f10c 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -55,7 +55,6 @@ permissions:
   contents: read
 
 env:
-  CARGO_INCREMENTAL: "0"
   CI: true
   DD_ENV: "ci"
 
diff --git a/.github/workflows/unit_mac.yml b/.github/workflows/unit_mac.yml
index a44a84d368953..aec7b4521e26a 100644
--- a/.github/workflows/unit_mac.yml
+++ b/.github/workflows/unit_mac.yml
@@ -15,8 +15,6 @@ jobs:
   unit-mac:
     runs-on: macos-14-xlarge
     timeout-minutes: 90
-    env:
-      CARGO_INCREMENTAL: 0
     steps:
       - name: Checkout branch
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

From 1ae4faf67bd011659152965bc71f69967fc4592a Mon Sep 17 00:00:00 2001
From: Thomas <thomas.schneider@datadoghq.com>
Date: Fri, 8 May 2026 16:46:09 -0400
Subject: [PATCH 2/2] Update .github/actions/setup/action.yml

Co-authored-by: Pavlos Rontidis <pavlos.rontidis@gmail.com>
---
 .github/actions/setup/action.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/actions/setup/action.yml b/.github/actions/setup/action.yml
index f049516993951..7257d92a8266b 100644
--- a/.github/actions/setup/action.yml
+++ b/.github/actions/setup/action.yml
@@ -142,7 +142,7 @@ runs:
           echo "RUST_BACKTRACE=full" >> "$GITHUB_ENV"
           # Set nice CI colors
           echo "CARGO_TERM_COLOR=always" >> "$GITHUB_ENV"
-          # Incremental compilation is useless in CI: no state is shared between runs
+          # Incremental compilation has no benefit because in our CI we always start from a clean state.
           echo "CARGO_INCREMENTAL=0" >> "$GITHUB_ENV"
         fi