Merge branch 'trunk' into new_num_layer

.github/workflows/ci.yml

@@ -2,9 +2,6 @@ on: [pull_request]
 
 name: CI
 
-env:
-  RUSTC_WRAPPER: "./ci/sccache"
-
 jobs:
   test:
     name: fmt, clippy, test, test --release
@@ -31,6 +28,24 @@ jobs:
 
       - run: rustup component add rustfmt
 
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Cache compiled valgrind
+        uses: actions/cache@v1
+        with:
+          path: ~/valgrind-3.6.1/
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
+
       - uses: actions-rs/cargo@v1
         name: rustfmt version
         with:
@@ -69,5 +84,3 @@ jobs:
         with:
           command: test
           args: --release
-
-      - run: ./ci/sccache --show-stats