I did some tests for another bug/thread where a person had no Haste effect being applied, well i found out that Efficiency 3 with regular Haste has no noticable increase in speed from just Efficiency 3, the same goes for Efficiency 4 with Haste 2. Might just be me though. I would say give it a test. I also wanna add in that going from Efficiency 2 with Regular Haste to Efficiency 3 seems like its the same speed, also this happens with Efficiency 3 with Haste 2 to Efficiency 4
From Thread MC-135207
Linked issues
Comments 6
with a Diamond pickaxe it seems like Efficiency 3 with Haste 2 on sandstone is instant, without Haste at all Efficiency 4 is instant, but the guy from the other thread was mining Stone.
with a Gold pickaxe it seems like Efficiency 3 with regular Haste on sandstone is instant like you said, but i also wanna point out that with Efficiency 1 and 2 with regular Haste Gold Pickaxe is the same speeds on sandstone. Seems the same for Haste 2 aswell
Just tested with a Diamond Pickaxe and it seems the same for it aswell so its got the same speeds on sandstone both with Efficiency 1 and 2 with Haste and Haste 2
Relates to MC-136213, see my analysis there.
Forward-resolving to MC-136213.
I am able to instamine sandstone using a gold pickaxe enchanted with efficiency 3 only while under the effects of haste.