Hashes a transaction outpoint (COutPoint) with a per‐instance random salt.
Synopsis
Declared in <util/hasher.h>
class SaltedOutpointHasher;Member Functions
Name |
Description |
|
Construct the hasher with a fresh random salt. |
Having the hash noexcept allows libstdc++'s unordered_map to recalculate the hash during rehash, so it does not have to cache the value. This reduces node's memory by sizeof(size_t). The required recalculation has a slight performance penalty (around 1.6%), but this is compensated by memory savings of about 9% which allow for a larger dbcache setting. |
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