C style code. Should be ~4secs or lower based on local testing. (#559)

1. Use Unsafe
2. Fit hashtable in L2 cache.
3. If we can find a good hash function, it can fit in L1 cache even.
4. Improve temperature parsing by using a lookup table
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Vemana 2024-01-26 03:10:14 +05:30 committed by GitHub
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commit 80cd738b4b
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#!/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.
#
# Basics
JAVA_OPTS=""
JAVA_OPTS="$JAVA_OPTS --enable-preview"
JAVA_OPTS="$JAVA_OPTS --add-exports java.base/jdk.internal.ref=ALL-UNNAMED"
JAVA_OPTS="$JAVA_OPTS --add-opens java.base/java.nio=ALL-UNNAMED"
# JIT parameters
JAVA_OPTS="$JAVA_OPTS -XX:+AlwaysCompileLoopMethods"
# GC parameters
JAVA_OPTS="$JAVA_OPTS -XX:+UseParallelGC"
java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_vemanaNonIdiomatic "$@"

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prepare_vemanaNonIdiomatic.sh Executable file
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#!/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-graal 1>&2

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