CalculateAverage_gonixunsafe: an attempt in the unsafe category (#695)

Co-authored-by: Giedrius D <[email protected]>

calculate_average_gonixunsafe.sh

@@ -0,0 +1,31 @@
+#!/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.
+#
+
+
+JAVA_OPTS="--enable-preview"
+# Copied from @serkan-ozal
+# Unsure if it helps (maybe something within ~10ms),
+# but at least it doesn't seem to make anything worse.
+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"
+if [[ ! "$(uname -s)" = "Darwin" ]]; then
+  JAVA_OPTS="$JAVA_OPTS -XX:+UseTransparentHugePages"
+fi
+
+exec cat < <(exec java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_gonixunsafe)