serkan-ozal's 3rd submission with some minor improvements: (#615)

- faster merge by ignoring empty entries in the map
- enable CDS for faster startup (added `prepare_serkan-ozal.sh` to generate CDS archive in advance)
- some tweaks with JVM options
- optimized result printing

1 files changed, 42 insertions, 0 deletions

diff --git a/prepare_serkan-ozal.sh b/prepare_serkan-ozal.sh
new file mode 100755
index 0000000..75df48a
--- /dev/null
+++ b/prepare_serkan-ozal.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+#
+#  Copyright 2023 The original authors
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+
+source "$HOME/.sdkman/bin/sdkman-init.sh"
+sdk use java 21.0.1-open 1>&2
+
+JAVA_OPTS="--enable-preview --enable-native-access=ALL-UNNAMED --add-modules=jdk.incubator.vector "
+JAVA_OPTS="$JAVA_OPTS -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions"
+JAVA_OPTS="$JAVA_OPTS -XX:-TieredCompilation -XX:MaxInlineSize=10000 -XX:InlineSmallCode=10000 -XX:FreqInlineSize=10000"
+JAVA_OPTS="$JAVA_OPTS -XX:-UseCountedLoopSafepoints -XX:GuaranteedSafepointInterval=0"
+JAVA_OPTS="$JAVA_OPTS -XX:+TrustFinalNonStaticFields -da -dsa -XX:+UseNUMA -XX:-EnableJVMCI"
+JAVA_OPTS="$JAVA_OPTS -Djdk.incubator.vector.VECTOR_ACCESS_OOB_CHECK=0"
+JAVA_OPTS="${JAVA_OPTS} -Dfile.path=src/test/resources/samples/measurements-10000-unique-keys.txt"
+if [[ ! "$(uname -s)" = "Darwin" ]]; then
+  JAVA_OPTS="$JAVA_OPTS -XX:+UseTransparentHugePages"
+fi
+
+# Set configs
+export USE_SHARED_ARENA=true
+export USE_SHARED_REGION=true
+export CLOSE_STDOUT_ON_RESULT=true
+
+CLASS_NAME="CalculateAverage_serkan_ozal"
+
+# Create CDS archive
+java ${JAVA_OPTS} -Xshare:off -XX:DumpLoadedClassList=target/${CLASS_NAME}.classlist --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.${CLASS_NAME}
+java ${JAVA_OPTS} -Xshare:dump -XX:SharedClassListFile=target/${CLASS_NAME}.classlist -XX:SharedArchiveFile=target/${CLASS_NAME}.jsa --class-path target/average-1.0.0-SNAPSHOT.jar
+java ${JAVA_OPTS} -Xshare:on -XX:SharedArchiveFile=target/${CLASS_NAME}.jsa -XX:ArchiveClassesAtExit=target/${CLASS_NAME}_cds.jsa --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.${CLASS_NAME}