[ https://issues.apache.org/jira/browse/IO-278?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sergio Bossa updated IO-278: ---------------------------- Attachment: TailerTest.diff Tailer.diff > Improve Tailer performance with buffered reads > ---------------------------------------------- > > Key: IO-278 > URL: https://issues.apache.org/jira/browse/IO-278 > Project: Commons IO > Issue Type: Improvement > Affects Versions: 2.0.1 > Reporter: Sergio Bossa > Attachments: Tailer.diff, TailerTest.diff > > > I noticed Tailer read performances are pretty poor when dealing with large, > frequently written, log files, and this is due to the use of RandomAccessFile > which does unbuffered reads, hence causing lots of disk I/O. > So I improved the Tailer implementation by introducing buffered reads: it > works by loading large (configurable) file chunks in memory, and reading > lines from there; this enhances performances in my tests from 10x to 30x > depending on the file size. > I also added two test cases: one to simulate reading of a large file (you can > use it to compare performances), the other to verify correct handling on > buffer breaks; obviously, all tests pass. > I'm attaching the diff files, let me know if it's okay for you guys! -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira