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Diffstat (limited to 'calculate_average_roman-r-m.sh')
| -rwxr-xr-x | calculate_average_roman-r-m.sh | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/calculate_average_roman-r-m.sh b/calculate_average_roman-r-m.sh index 47626a1..fe468dc 100755 --- a/calculate_average_roman-r-m.sh +++ b/calculate_average_roman-r-m.sh @@ -16,4 +16,10 @@ # JAVA_OPTS="--enable-preview -XX:+UseTransparentHugePages" + +# epsilon GC needs enough memory or it makes things worse +# see https://stackoverflow.com/questions/58087596/why-are-repeated-memory-allocations-observed-to-be-slower-using-epsilon-vs-g1 +# 2GB seems to be the sweet spot +JAVA_OPTS="$JAVA_OPTS -XX:+UnlockExperimentalVMOptions -XX:-EnableJVMCI -XX:+UseEpsilonGC -Xmx2G -Xms2G -XX:+AlwaysPreTouch" + java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_roman_r_m |