f9c58414da
* cleanup prepare script * native image options * fix quardaric probing (no change to perf) * mask to get the last chunk of the name * extract hash functions * tweak the probing loop (-100ms) * fiddle with native image options * Reorder conditions in hope it makes branch predictor happier * extracted constant
31 lines
1.4 KiB
Bash
Executable File
31 lines
1.4 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright 2023 The original authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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if [ -f target/CalculateAverage_roman_r_m_image ]; then
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echo "Running native image 'target/CalculateAverage_roman_r_m_image'." 1>&2
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target/CalculateAverage_roman_r_m_image
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else
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JAVA_OPTS="--enable-preview -XX:+UseTransparentHugePages"
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JAVA_OPTS="$JAVA_OPTS -XX:+UnlockExperimentalVMOptions -XX:+TrustFinalNonStaticFields -dsa -XX:+UseNUMA"
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# epsilon GC needs enough memory or it makes things worse
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# see https://stackoverflow.com/questions/58087596/why-are-repeated-memory-allocations-observed-to-be-slower-using-epsilon-vs-g1
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JAVA_OPTS="$JAVA_OPTS -XX:+UnlockExperimentalVMOptions -XX:-EnableJVMCI -XX:+UseEpsilonGC -Xmx1G -Xms1G -XX:+AlwaysPreTouch"
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echo "Running on JVM" 1>&2
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java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_roman_r_m
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fi
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