travis: Run bench_bitcoin once

.travis.yml

@@ -15,6 +15,7 @@ env:
   global:
     - MAKEJOBS=-j3
     - RUN_TESTS=false
+    - RUN_BENCH=false  # Set to true for any one job that has debug enabled, to quickly check bench is not crashing or hitting assertions
     - DOCKER_NAME_TAG=ubuntu:18.04
     - BOOST_TEST_RANDOM=1$TRAVIS_BUILD_ID
     - CCACHE_SIZE=100M
@@ -65,6 +66,7 @@ env:
         PACKAGES="python3-zmq qtbase5-dev qttools5-dev-tools protobuf-compiler libdbus-1-dev libharfbuzz-dev libprotobuf-dev"
         DEP_OPTS="NO_QT=1 NO_UPNP=1 DEBUG=1 ALLOW_HOST_PACKAGES=1"
         RUN_TESTS=true
+        RUN_BENCH=true
         GOAL="install"
         BITCOIN_CONFIG="--enable-zmq --with-gui=qt5 --enable-glibc-back-compat --enable-reduce-exports --enable-debug CXXFLAGS=\"-g0 -O2\""
 # x86_64 Linux (Qt5 & system libs)
@@ -124,6 +126,7 @@ script:
     - BEGIN_FOLD configure; DOCKER_EXEC ./configure --cache-file=../config.cache $BITCOIN_CONFIG_ALL $BITCOIN_CONFIG || ( cat config.log && false); END_FOLD
     - BEGIN_FOLD build; DOCKER_EXEC make $MAKEJOBS $GOAL || ( echo "Build failure. Verbose build follows." && DOCKER_EXEC make $GOAL V=1 ; false ); END_FOLD
     - if [ "$RUN_TESTS" = "true" ]; then BEGIN_FOLD unit-tests; DOCKER_EXEC LD_LIBRARY_PATH=$TRAVIS_BUILD_DIR/depends/$HOST/lib make $MAKEJOBS check VERBOSE=1; END_FOLD; fi
+    - if [ "$RUN_BENCH" = "true" ]; then BEGIN_FOLD bench; DOCKER_EXEC LD_LIBRARY_PATH=$TRAVIS_BUILD_DIR/depends/$HOST/lib $OUTDIR/bin/bench_bitcoin -scaling=0.001 ; END_FOLD; fi
     - if [ "$TRAVIS_EVENT_TYPE" = "cron" ]; then extended="--extended --exclude feature_pruning,feature_dbcrash"; fi
     - if [ "$RUN_TESTS" = "true" ]; then BEGIN_FOLD functional-tests; DOCKER_EXEC test/functional/test_runner.py --combinedlogslen=4000 --coverage --quiet --failfast ${extended}; END_FOLD; fi
 after_script: