Hey,

I'm using LR 2.0 now. I seem to think that the performance from switching modes or just some "other" features about it...to be...a bit sluggish.

I'm booting it in 64-bit mode on my 3.06 Ghz iMac with 2GB RAM.

I have not tried it in the "other" mode yet, but I recall LR 1.4 to be a bit more zippy.

Anyone care to comment?

Thanks.

Since you have 4GB of RAM or less, you may want to run it in 32bit mode.

I thought that by running it in 64-bit mode would take advantage of a Core Duo processor and any "decent" amount of RAM to speed things up.

Is this not the case? I mean, what do you laptop guys do? You can only stuff 4GB in your machines, right?

I'll give it a try and report my findings.


Thanks!

Here's a User to User discussion on it.

I'm going by my own experience on my MBP with 3GB of RAM. It runs faster for me in 32bit mode.

Thanks for that info, Terry. I'll give it a shot. My iMac only maxes out at 4GB anyway.

Oh well.

As stated in the discussion, you will not see any speed increase by using 64-bit mode if you have don't have over 4GB of memory. There's no magic to running a 64-bit program - it just means it can access more than 4 GB of memory efficiently. This is great for a large database server, or Photoshop, or another graphics program (like Lightroom) - but only if you have the memory to use.

The reason it's slower is that a 64-bit program has access to more than 4 GB of memory even if you don't (thanks to swap memory). So all memory requests and addresses used (which is everything) are double the size of those requests in a 32-bit program. This means most instructions in memory are longer, which means they take more time to execute. If you are actually using more than 4GB of memory, and have large database table/photos/etc., you can easily make this time up, but not if you only have 4 GB of memory or less.

Thanks for clearing that up, Jack.

Now I'll just have to buy a new Mac again.

Just kidding!