Hi, i have just compared SUNs JDK 1.3 (with Hotspot) against IBM 1.3 (13) with xmlBlaster on Linux (600 MHz): IBMs jdk boosts xmlBlaster message throuput from 300 (with SUN/HotSpot) to 405 messages/second. nice! Marcel -- Marcel Ruff mailto:ruff at swand.lake.de http://www.lake.de/home/lake/swand/ http://www.xmlBlaster.org