Our latest release (from late yesterday) has a fix which should cause some improvement in lag for projects with large numbers of blocks. The improvement should occur when moving, modifying, adding and deleting blocks. The improvement may be significant for some projects and marginal for others. Let us know if you notice any change.
We have also started to make some more changes which, when complete, should further improve lagginess with large numbers of blocks and screens. This work is likely cause more dramatic improvements than yesterday’s but YMMV. We’ll keep you posted.
-Mark
P.S. Make sure that you do a hard reload in your browser in order to ensure that you get the latest changes to Thunkable ✕.
P.P.S. The new changes that we are still working on should deal with the lagginess brought about by the use of variables.