So Windows should no longer warn that the application is from an unknown publisher. In SongKong 8.4 we had to purchase a new Windows security certificate because the previous one had expired, however there was an issue with the build process that meant the new security certificate was not correctly applied, this has now been resolved. We have now modified the report so it only summarizes the duplicates found by artist on the main page, and there are separate artist pages (Song is duplicate if same Song) or artist and album pages (Song is duplicate if same Song and Album) for details of the duplicates.= Windows Security Certificate Previously, when a large number of duplicates were found the Delete Duplicates report could get very large because all results are stored on a single web-page, this can then mean the web-page takes a long time to load in your web-browser. This means deletion still has effect even if any problem occurs during the process, this improvement is most useful when trying to run Delete Duplicates on large quantities of music files. We have now changed things so that files are checked for duplication as they are loaded, and if we have two files with the same duplicate key the one with the less preferred deletion criteria is immediately deleted. This meant that if anything went wrong before that nothing would be deleted, and it also mean't that if dealing with alot of files the deletion could take some time. Travel, Transport, Logistics & Hospitality.Application Modernization & Integration.Before this release, Delete Duplicates would not actually delete any duplicate files until all files were loaded. Java application performance has always been a mere buzzword until you face its real implications. It may vary depending on your interpretation and experience. You may be facing one of the issues listed below: The finally block is a key tool for preventing resource leaks In this blog, I am focusing specifically on Java heap and Java performance tuning. Your application may not be responding well because it's spending too much time in cleaning up the garbage rather than running the necessary processes. This can be either due to valid objects that are required to stay in Java heap memory, or because the programmer forgot to remove the reference to unwanted objects (typically known as 'memory leaks' in Java parlance).īelow are a few simple Java performance tuning tips which you can follow during your development process: The memory usage of the application is related to the number and size of live objects that are in the Java virtual machine (JVM) at any given point of time. XX:MaxPermSize=256m(: PermGen space): PermGen space Xmx (: Java heap space).: Java heap space JavaHeap space is low to create new objects.This exception mainly occurs due to possible reasons listed below: When the memory footprint hits the threshold, the JVM throws the exception. The Java Native Interface (JNI) Heap runs low on memory, even though the JavaHeap and the PermGen have memory. This typically happens if you are making lots of heavy JNI calls, but the JavaHeap objects occupy little space. In that scenario, the garbage collector (GC) thread might not feel the urge to clean up JavaHeap memory, while the JNI Heap keeps on increasing till it goes out of memory. It is recommended to increase the Java heap space only up to one-half of the total RAM available on the server. Increasing the Java heap space beyond that value can cause performance problems. If you are using Tomcat, you can follow the steps below: For example, if your server has 16 GB of RAM available, then the maximum heap space you should use is 8 GB. Open the catalina.bat file (TomcatInstallDirectory/bin/catalina.bat). StringBuilder can be used to concatenate strings programmatically. There are lots of different options to concatenate strings in Java. You can, for example, use a simple “+” or “+=”, the good old StringBuffer, or a StringBuilder. Another quick and easy way to avoid any overhead and improve the performance of your application is to use primitive types instead of their wrapper classes. So, it’s better to use an “int” instead of an Integer, or a “double” instead of a Double. That allows your JVM to store the value in the stack instead of the heap to reduce memory consumption and overall handle it more efficiently.Īs we’re already talking about data types, we should also take a quick look at BigInteger and BigDecimal. Especially the latter one is popular because of its precision. BigInteger and BigDecimal require much more memory than a simple “long” or “double” and slow down all calculations dramatically.
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