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Remove redundant memory usage in Checkpoints #4540

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Merged
Amxx merged 8 commits into from
Jan 17, 2024
Merged

Remove redundant memory usage in Checkpoints #4540

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74ef057
Remove redundant memory usage in checkpoints
0xVolosnikov Aug 25, 2023
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0xVolosnikov Aug 28, 2023
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0xVolosnikov Aug 28, 2023
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0xVolosnikov Aug 28, 2023
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Merge branch 'master' into optimize-checkpoints
ernestognw Jan 16, 2024
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Remove redundant memory usage in checkpoints
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@0xVolosnikov
0xVolosnikov committed Aug 25, 2023
commit 74ef057d3ee33685ab61bbeee4240f04de133db7
24 changes: 14 additions & 10 deletions contracts/utils/structs/Checkpoints.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,7 @@ library Checkpoints {
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint224 memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
Checkpoint224 storage ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._key, ckpt._value);
}
}
Expand Down Expand Up @@ -127,20 +127,22 @@ library Checkpoints {

if (pos > 0) {
// Copying to memory is important here.
Checkpoint224 memory last = _unsafeAccess(self, pos - 1);
Checkpoint224 storage last = _unsafeAccess(self, pos - 1);
uint32 lastKey = last._key;
uint224 lastValue = last._value;

// Checkpoint keys must be non-decreasing.
if (last._key > key) {
if (lastKey > key) {
revert CheckpointUnorderedInsertion();
}

// Update or push new checkpoint
if (last._key == key) {
if (lastKey == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint224({_key: key, _value: value}));
}
return (last._value, value);
return (lastValue, value);
} else {
self.push(Checkpoint224({_key: key, _value: value}));
return (0, value);
Expand Down Expand Up @@ -286,7 +288,7 @@ library Checkpoints {
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint160 memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
Checkpoint160 storage ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._key, ckpt._value);
}
}
Expand Down Expand Up @@ -314,20 +316,22 @@ library Checkpoints {

if (pos > 0) {
// Copying to memory is important here.
Checkpoint160 memory last = _unsafeAccess(self, pos - 1);
Checkpoint160 storage last = _unsafeAccess(self, pos - 1);
uint96 lastKey = last._key;
uint160 lastValue = last._value;

// Checkpoint keys must be non-decreasing.
if (last._key > key) {
if (lastKey > key) {
revert CheckpointUnorderedInsertion();
}

// Update or push new checkpoint
if (last._key == key) {
if (lastKey == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint160({_key: key, _value: value}));
}
return (last._value, value);
return (lastValue, value);
} else {
self.push(Checkpoint160({_key: key, _value: value}));
return (0, value);
Expand Down