solana/runtime
behzad nouri 3252dc7203
uses structural sharing for stake-delegations hash-map (#23585)
StakeDelegations is using Arc to implement copy-on-write semantics:
https://github.com/solana-labs/solana/blob/58c0db970/runtime/src/stake_delegations.rs#L14-L16

However a single delegation change will still clone the entire hash-map,
resulting in excessive memory use as observed in:
https://github.com/solana-labs/solana/issues/23061#issuecomment-1063444072

This commit instead uses immutable hash-map implementing structural
sharing:
> which means that if two data structures are mostly copies of each
> other, most of the memory they take up will be shared between them.
https://docs.rs/im/latest/im/
2022-03-16 12:58:05 +00:00
..
benches plumbing for 'other_slot' in 'update_index' (#23330) 2022-02-25 12:58:08 -06:00
src uses structural sharing for stake-delegations hash-map (#23585) 2022-03-16 12:58:05 +00:00
store-tool Bump version to 1.10.3 (#23648) 2022-03-14 11:18:45 -05:00
tests Reformat imports to a consistent style for imports 2021-12-03 09:19:13 -08:00
.gitignore
Cargo.toml uses structural sharing for stake-delegations hash-map (#23585) 2022-03-16 12:58:05 +00:00
build.rs