Accelerator, probably.

This would be really fantastic. Ive started getting into Fabric lately for the performance gains and the item pipes can barely keep up with a basic mob grinder only pulling out 4 items at a time. Thanks for making this mod.

You can increase the amount of items pulled at once, and the pull frequency, using various upgrades.

To give you an idea of the supported upgrades: (the effects can be seen by pressing U on an extractor in REI)