CI/Build: Speedup unit tests

.github/workflows/ci.yml

@@ -40,17 +40,21 @@ jobs:
   unit-tests:
     runs-on: ubuntu-latest
     steps:
+      - name: Add code coverage tools
+        run: |
+          rustup component add llvm-tools-preview
+          cargo install grcov
       - uses: actions/checkout@v2
       - name: Run units tests (with coverage)
         env:
-          DOCKER_BUILDKIT: 1
-        # Remove .dockerignore file so codecov has access to git info
+          RUSTFLAGS: -Cinstrument-coverage
+          LLVM_PROFILE_FILE: stacks-blockchain-%p-%m.profraw
         run: |
-          rm .dockerignore
-          docker build -o coverage-output -f ./.github/actions/bitcoin-int-tests/Dockerfile.code-cov .
+          cargo test --workspace
+          grcov . --binary-path ./target/debug/ -s . -t lcov --branch --ignore-not-existing --ignore "/*" -o lcov.info
       - uses: codecov/codecov-action@v2
         with:
-          files: ./coverage-output/lcov.info
+          files: ./lcov.info
           name: unit_tests
           fail_ci_if_error: false
 

Cargo.toml

@@ -109,8 +109,16 @@ monitoring_prom = ["prometheus"]
 slog_json = ["slog-json", "stacks_common/slog_json", "clarity/slog_json"]
 testing = []
 
-[profile.dev.package.regex]
-opt-level = 2
+# Use a bit more than default optimization for
+#  dev builds to speed up test execution
+[profile.dev]
+opt-level = 1
+
+# Use release-level optimization for dependencies
+# This slows down "first" builds on development environments,
+#  but won't impact subsequent builds.
+[profile.dev.package."*"]
+opt-level = 3
 
 [target.'cfg(all(any(target_arch = "x86_64", target_arch = "x86", target_arch = "aarch64"), not(target_env = "msvc")))'.dependencies]
 sha2 = { version = "0.10", features = ["asm"] }