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get rid of unnecessary data copy (#16214)

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* get rid of unnecessary data copy

* preserve rent_epoch
This commit is contained in:
Jeff Washington (jwash)
2021-03-31 09:11:39 -05:00
committed by GitHub
parent e57975de26
commit a5dcee254d
1 changed files with 3 additions and 11 deletions
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14
runtime/src/message_processor.rs
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@ -204,17 +204,9 @@ impl PreAccount {
pub fn update(&mut self, account: &AccountSharedData) { pub fn update(&mut self, account: &AccountSharedData) {
let mut pre = self.account.borrow_mut(); let mut pre = self.account.borrow_mut();
let rent_epoch = pre.rent_epoch();
pre.lamports = account.lamports; *pre = account.clone();
pre.owner = account.owner; pre.set_rent_epoch(rent_epoch);
pre.executable = account.executable;
if pre.data().len() != account.data().len() {
// Only system account can change data size, copy with alloc
pre.set_data(account.data().clone());
} else {
// Copy without allocate
pre.data_as_mut_slice().clone_from_slice(&account.data());
}
self.changed = true; self.changed = true;
} }