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Added comments to used flags, clean up code, final fine tuning. (#674)

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Thomas Wuerthinger
2024-01-31 09:34:15 +01:00
committed by GitHub
parent 7f0e517811
commit a5ce4ba771
2 changed files with 114 additions and 136 deletions
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16
prepare_thomaswue.sh
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@@ -20,7 +20,19 @@ sdk use java 21.0.2-graal 1>&2
# ./mvnw clean verify removes target/ and will re-trigger native image creation.
if [ ! -f target/CalculateAverage_thomaswue_image ]; then
NATIVE_IMAGE_OPTS="--gc=epsilon -O3 -H:TuneInlinerExploration=1 -march=native --enable-preview --initialize-at-build-time=dev.morling.onebrc.CalculateAverage_thomaswue\$Scanner"
# Use -H:MethodFilter=CalculateAverage_thomaswue.* -H:Dump=:2 -H:PrintGraph=Network for IdealGraphVisualizer graph dumping.
# Performance tuning flags, optimization level 3, maximum inlining exploration, and compile for the architecture where the native image is generated.
NATIVE_IMAGE_OPTS="-O3 -H:TuneInlinerExploration=1 -march=native"
# Need to enable preview for accessing the raw address of the foreign memory access API.
# Initializing the Scanner to make sure the unsafe access object is known as a non-null compile time constant.
NATIVE_IMAGE_OPTS="$NATIVE_IMAGE_OPTS --enable-preview --initialize-at-build-time=dev.morling.onebrc.CalculateAverage_thomaswue\$Scanner"
# There is no need for garbage collection and therefore also no safepoints required.
NATIVE_IMAGE_OPTS="$NATIVE_IMAGE_OPTS --gc=epsilon -H:-GenLoopSafepoints"
# Uncomment the following line for outputting the compiler graph to the IdealGraphVisualizer
# NATIVE_IMAGE_OPTS="$NATIVE_IMAGE_OPTS -H:MethodFilter=CalculateAverage_thomaswue.* -H:Dump=:2 -H:PrintGraph=Network"
native-image $NATIVE_IMAGE_OPTS -cp target/average-1.0.0-SNAPSHOT.jar -o target/CalculateAverage_thomaswue_image dev.morling.onebrc.CalculateAverage_thomaswue
fi