First version - roman_r_m (#193)

* initial commit

* - use loop
- use mutable object to store results

* get rid of regex

* Do not allocate measurement objects

* MMap + custom double parsing ~ 1:30 (down from ~ 2:05)

* HashMap for accumulation and only sort at the end - 1:05

* MMap the whole file

* Use graal

* no GC

* Store results in an array list to avoid double map lookup

* Adjust max buf size

* Manual parsing number to long

* Add --enable-preview

* remove buffer size check (has no effect on performance)

* fix min & max initialization

* do not check for \r

* Revert "do not check for \r"

This reverts commit 9da1f574bf6261ea49c353488d3b4673cad3ce6e.

* Optimise parsing. Now completes in 31 sec down from ~43

* trying to parse numbers faster

* use open address hash table instead of the standard HashMap

* formatting

* Rename the script to match github username (change underscores to slashes)
Enable transparent huge pages, seems to improve by ~2 sec

* Revert "formatting"

This reverts commit 4e90797d2a729ed7385c9000c85cc7e87d935f96.

* Revert "use open address hash table instead of the standard HashMap"

This reverts commit c784b55f61e48f548b2623e5c8958c9b283cae14.

* add prepare_roman-r-m.sh

* SWAR tricks to find semicolon (-2 seconds ro run time)

* remove time call

* fix test

* Parallel version (~6.5 seconds)

1 files changed, 19 insertions, 0 deletions

diff --git a/calculate_average_roman-r-m.sh b/calculate_average_roman-r-m.sh
new file mode 100755
index 0000000..47626a1
--- /dev/null
+++ b/calculate_average_roman-r-m.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+#
+#  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 -XX:+UseTransparentHugePages"
+java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_roman_r_m