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How can it be that the 64bit version of tvpaint (10.5.1) feels a lot slower than the 32 bit version (10.5.1)?
Except for saving your project. In that case the 32 bit version of tvpaint 10.5.1 is a lot slower. (slower than before the 10.5 version of tvpaint).

I work in mac osx 10.8.4

Hmm, indeed, it's not normal.

How do you experiment the lag ? I mean, just by simple drawings ? or with FX ? Or... ?

Just by drawing.
Using the same project size I always use.

Did you recently update your Wacom drivers ?

Yes, I recently updated my drives.

Maybe I have to be more specific: It's not drawing that makes tvpaint slower. the biggest problem is moving trough my timeline. The 64 bit version doesn't work as smooth as the 32 bit version when moving trough my frames with the arrow buttons on my keyboard.

Hmm, I experimented the both version with heavy files and, well, I must admit that something, the 64 bit version lags a lot.

Joost wrote:Yes, I recently updated my drives.

Maybe I have to be more specific: It's not drawing that makes tvpaint slower. the biggest problem is moving trough my timeline. The 64 bit version doesn't work as smooth as the 32 bit version when moving trough my frames with the arrow buttons on my keyboard.

A bug has recently been fixed regarding the timeline / layer change.
Will see if it's still the like this on next build.

Yes, it does Fabrice, I tested with the last intern version