Merge bitcoin/bitcoin#32888: ci: Use optimized Debug build type in test-each-commit

faa3171 ci: Use optimized Debug build type in test-each-commit (MarcoFalke)
fa21c34 ci: [doc] reword debug log message (MarcoFalke)

Pull request description:

  An optimized debug build is mostly as fast as a release build, because hot loops of heavy debug-only code are rare. So use that setting in the test-each-commit CI, to enable more checks almost "for free".

ACKs for top commit:
  Prabhat1308:
    re-ACK [`faa3171`](bitcoin/bitcoin@faa3171)
  willcl-ark:
    crACK faa3171

Tree-SHA512: ca041cf7f79d7abb6f93e17b58b2aea730f3bb9fc51256c1ca1b9f7ce7e7188d18fd99d3754cdbe3f504f4e08d560e72d4b7a75409c214ee2c3771c9a8ba7f96

Author: fanquake

.github/ci-test-each-commit-exec.py

@@ -17,19 +17,25 @@ def run(cmd, **kwargs):
 
 
 def main():
-    print("Running test-one-commit on ...")
+    print("Running tests on commit ...")
     run(["git", "log", "-1"])
 
     num_procs = int(run(["nproc"], stdout=subprocess.PIPE).stdout)
 
-    # Use clang++, because it is a bit faster and uses less memory than g++
     run([
         "cmake",
         "-B",
         "build",
         "-Werror=dev",
+        # Use clang++, because it is a bit faster and uses less memory than g++
         "-DCMAKE_C_COMPILER=clang",
         "-DCMAKE_CXX_COMPILER=clang++",
+        # Use mold, because it is faster than the default linker
+        "-DCMAKE_EXE_LINKER_FLAGS=-fuse-ld=mold",
+        # Use Debug build type for more debug checks, but enable optimizations
+        "-DAPPEND_CXXFLAGS='-O3 -g2'",
+        "-DAPPEND_CFLAGS='-O3 -g2'",
+        "-DCMAKE_BUILD_TYPE=Debug",
         "-DWERROR=ON",
         "-DWITH_ZMQ=ON",
         "-DBUILD_GUI=ON",

.github/workflows/ci.yml

@@ -77,7 +77,7 @@ jobs:
           git config user.name "CI"
       - run: |
           sudo apt-get update
-          sudo apt-get install clang ccache build-essential cmake ninja-build pkgconf python3-zmq libevent-dev libboost-dev libsqlite3-dev systemtap-sdt-dev libzmq3-dev qt6-base-dev qt6-tools-dev qt6-l10n-tools libqrencode-dev -y
+          sudo apt-get install clang mold ccache build-essential cmake ninja-build pkgconf python3-zmq libevent-dev libboost-dev libsqlite3-dev systemtap-sdt-dev libzmq3-dev qt6-base-dev qt6-tools-dev qt6-l10n-tools libqrencode-dev -y
       - name: Compile and run tests
         run: |
           # Run tests on commits after the last merge commit and before the PR head commit