improve speed, thanks to the following improvements: (#550)

* improve speed, thanks to the following improvements:
- loop unrolling and eleminating extra calculations
- eleminating instance level variable access
- quicker equals check, checking long by long chunks instead of bytes
- update GraalVM version to the latest

* faster equals check

* fix equals bug in 10K, more optimizations on equals and calculate hash parts

* New solution optimized for Linux/AMD hardware

* Optimize solution, try to fix 10K bug on native

* Optimize solution, move records to a local field

* test timing

* revert back accidentally pushed code

---------

Co-authored-by: Yavuz Tas <yavuz.tas@ing.com>

calculate_average_yavuztas.sh

@@ -15,5 +15,11 @@
 #  limitations under the License.
 #
 
-JAVA_OPTS="-Xms128m -Xmx128m -XX:MaxGCPauseMillis=1 -XX:-AlwaysPreTouch -XX:+UseSerialGC --enable-preview"
-java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_yavuztas
+if [ -f target/CalculateAverage_yavuztas_image ]; then
+    echo "Picking up existing native image 'target/CalculateAverage_yavuztas_image', delete the file to select JVM mode." 1>&2
+    target/CalculateAverage_yavuztas_image
+else
+    JAVA_OPTS="-XX:MaxGCPauseMillis=1 -XX:-AlwaysPreTouch -XX:+UseSerialGC -XX:+TieredCompilation --enable-preview"
+    echo "Choosing to run the app in JVM mode as no native image was found, use prepare_yavuztas.sh to generate." 1>&2
+    java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_yavuztas
+fi