Hold select on boot to open the Luma config menu and toggle the New 3DS CPU options.
From the Luma wiki:
"New 3DS CPU: Force the higher clock rate and/or extra L2 cache even on games/applications that do not officially support it. This can have performance benefits but a few rare games have stability issues with it. There are four options:
- Off: Clock/L2 not forced, stock system behavior.
- Clock: The New 3DS CPU will run at 804MHz instead of 268MHz even in games that are not New 3DS-enhanced if this option is selected.
- L2: The New 3DS' extra L2 cache will be enabled for games that do not normally support it.
- Clock+L2: The previous two options, combined.
- Note: Clock/L2 are also toggleable once the 3DS is already booted, via Rosalina. "
"Clock" is the most similar option to what you where using in hans I think.