We have been using IntelliJ since 4.0 here at Alcatel, Canada, with the majority of the group using 4.5.2. Since IntelliJ 5.0 seems to be getting more stable, I decided to give it a try over the past few weeks (latest try - build# 3496).
Our project has about 29000 classes, with some classes having greater than 10000 lines (on account of being code-generated). Because of the nature of the code, and dependencies, multi-modules does not help - hence the whole source is loaded as a single-module project.
In the IntelliJ 5.0 builds that I have tried (including # 3496), initial project loading takes close to an hour and a half. The same project takes about 25 minutes in IntelliJ 4.5.2.
Subsequent project restarts are comparable. Project loads with IntelliJ 5.0 were done with ALL inspections off (just in case they were causing the slowness) whereas they were on in IntelliJ 4.5.2. Moreover, CVS updates again cause the IDE to freeze for 30+ minutes with 1 CPU pegged.
Tests were conducted on a hyper-threaded 3.0 Ghz Dell Pentium, with 3 GB of RAM (/3GB disabled), with de-fragmented MFT and disk (SATA 150). Both IDE versions were started with Xmx set to 892 Mb.
Are there any plans on addressing this? This is a major road-block for us to recommending upgrading to Intellij 5.0 internally.