Build 3429 speed problem on dual CPU machine

We have pretty fast dual CPU machines at work, but I've found the latest few builds of IDEA to be very slow, especially when swapping from one file to the next. IDEA regurarly pauses for a few seconds.

However, I have found the same builds run at an acceptable speed on my personal two year old, single CPU notebook.

This morning I downloaded build 3429 and noticed a slow down after just a few minutes work. I then, using the Task Manager, set the CPU affinity for idea.exe, restricting IDEA to a single CPU. Since then IDEA has performed without any of the slow downs I noticed in recent builds.

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That may be more related to your OS. We used to have to set affinity on
our duals for W2K Pro. Once we upgraded to XP Pro, we didn't have to.
XP is smart enough to keep a thread on the same CPU.

Eamon Walshe wrote:

>We have pretty fast dual CPU machines at work, but I've found the latest few builds of IDEA to be very slow, especially when swapping from one file to the next. IDEA regurarly pauses for a few seconds.
>
>However, I have found the same builds run at an acceptable speed on my personal two year old, single CPU notebook.
>
>This morning I downloaded build 3429 and noticed a slow down after just a few minutes work. I then, using the Task Manager, set the CPU affinity for idea.exe, restricting IDEA to a single CPU. Since then IDEA has performed without any of the slow downs I noticed in recent builds.
>

>

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That may be more related to your OS. We used to have
to set affinity on
our duals for W2K Pro. Once we upgraded to XP Pro,
we didn't have to.
XP is smart enough to keep a thread on the same CPU.

We run XP Pro on our development desktop machines.

IDEA 4.5 did not exhibit the same slowdown. I also did not notice the same type of slow down with EAP builds before 3290. Where exactly it crept in I'm not sure. We stayed on 3290 for a long time as later builds had problems we could not work with.

In addition to two CPUs we have two displays and have the IDEA project tree window floating on the second display. Sometimes, when IDEA pauses for a think, giving another appliation focus can unlock IDEA. Sadly, this observation is not scientific - it's just possible that IDEA was ready to respond anyway.

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