These constants are specific to FRAME, and the current implementation of its various components. For example: FRAME System, FRAME Executive, our FRAME support libraries, etc…
Time to execute an empty block. Calculated by multiplying the Average with
Time to execute a NO-OP extrinsic, for example
System::remark. Calculated by multiplying the Average with
ParityDB can be enabled with a feature flag, but is still experimental. These weights are available for brave runtime engineers who may want to try this out as default.
By default, Substrate uses RocksDB, so this will be the weight used throughout the runtime.