Constant cfx_parameters::light::LOG_FILTERING_LOOKAHEAD

pub const LOG_FILTERING_LOOKAHEAD: usize = 100;

During log filtering, we stream a set of items (blooms, receipts, txs) to match against. To make the process faster, we need to make sure that there’s always plenty of items in flight. This way, we can reduce idle time when we’re waiting to receive an item.