Use memmap2 in deserialize_from_file #1927
Merged
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Description
As discussed in CosmWasm/cosmwasm#660, we might want to use memmap in deserialize_from_file to speed up artifact loading.
This uses the fork memmap2 because https://rustsec.org/advisories/RUSTSEC-2020-0077.html
This is based on df3a211 and a CHANGELOG entry is missing, but adding it now for visibility and testing.Review