Granular Gamerules lets you accelerate certain game elements that are randomly ticked, by granting them an extra amount of ticks.
Increasing these values to a large value will tank performance similar to changing the base randomTickSpeed rule - make sure you profile for any major impact, and I don't recommend setting them above 1000. The following gifs are for demonstration purposes.
Copper Blocks
Copper blocks oxidizing at 40,000x base rate (!).
How many extra random ticks copper blocks will receive, per game tick.