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#!/bin/sh

     

       
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#!/bin/bash

     

       
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#

     

       
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#  Copyright 2023 The original authors

     

       
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#

     
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#  limitations under the License.

     

       
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#

     

       
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# also tried: 23.ea.3-open, 21.0.1-graalce, 21.0.1-graal, 21.0.1.crac-librca (tried CRaC API to see if it preserves JIT state)

     

       
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. "$HOME/.sdkman/bin/sdkman-init.sh"

     

       
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sdk use java 21.0.1-tem

     

       
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# --enable-preview to use the new memory mapped segments

     

       
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# We don't allocate much, so just give it 1G heap and turn off GC; the AlwaysPreTouch was suggested by the ergonomics

     

       
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JAVA_OPTS="--enable-preview -da -dsa -Xms1g -Xmx1g -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC  -XX:+AlwaysPreTouch"

     

       
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# Experimenting on the target VM config with various memory tweaks showed that UseTransparentHugePages gives us 10% boost

     

       
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JAVA_OPTS="--enable-preview -da -dsa -Xms1g -Xmx1g -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC  -XX:+AlwaysPreTouch -XX:+UseTransparentHugePages"

     

       
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time java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_ddimtirov

     

       
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# & "$Env:JAVA_HOME/bin/java" --enable-preview -Xms1g -Xmx1g -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC  -XX:+AlwaysPreTouch --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_ddimtirov