CalcBlake2b256
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class CalcBlake2b256
| package sigmastate
Cost of: of hashing 1 block of data.
Cost of: of hashing 1 block of data.
This cost is used as a baseline to connect cost units with absolute time. The block validation have 1000000 of cost units budget, and we want this to correspond to 1 second. Thus we can assume 1 cost unit == 1 micro-second.
It takes approximately 1 micro-seconds on average to compute hash of 128 bytes block on MacBook Pro (16-inch, 2019) 2.3 GHz 8-Core Intel Core i9.
Thus per block cost of Blake2b256 hashing can be limited by 1 cost units. However, on a less powerful processor it may take much more time, so we add a factor of 3 for that. Additionally, the interpreter has overhead so that performing 1000 of hashes in a tight loop is 3-4 times faster than doing the same via ErgoTreeEvaluator. Thus we should add another factor of 2 and this takes place for all operations. So we will use a total factor of 10 to convert actual operation micro-seconds time (obtained via benchmarking) to cost unit estimation (used for cost prediction).
Cost_in_units = time_in_micro-seconds * 7 = 7
NOTE, 128 is the size of message chunk processed by Blake2b256 algorithm.
Unique id of the node class used in serialization of ErgoTree.
Unique id of the node class used in serialization of ErgoTree.