during the first launch of java applets or jnlp apps, after you upgrade to java 6, you will encounter the cache upgrade, before the applet or application will load.

it might take seconds or minutes, depending on the previous java cache size on the local disk.

one possible way to improve is to instead just check and see if the resource requested can be upgraded, and then load the applet/jnlp app right the way, and continue the complete cache upgrade in the background. consumers should not need to wait for the upgrade to complete before the applet/app can start.