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perf: eager resize for ´load_data´ #1117

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merged 2 commits into from
May 5, 2023
Merged

perf: eager resize for ´load_data´ #1117

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perf: eager resize for ´load_data´
Oppen May 4, 2023
aabef6b
Merge branch 'main' into perf/eager_memory_resize_load_data
Oppen May 5, 2023
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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -2,6 +2,8 @@

#### Upcoming Changes

* perf: insert elements from the tail in `load_data` so reallocation happens only once [#1117](https://github.com/lambdaclass/cairo-rs/pull/1117)

* Use to_signed_felt as function for felt252 as BigInt within [-P/2, P/2] range and use to_bigint as function for representation as BigInt. [#1100](https://github.com/lambdaclass/cairo-rs/pull/1100)

* Implement hint on field_arithmetic lib [#1090](https://github.com/lambdaclass/cairo-rs/pull/1090)
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4 changes: 3 additions & 1 deletion src/vm/vm_memory/memory_segments.rs
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Expand Up @@ -55,7 +55,9 @@ impl MemorySegmentManager {
ptr: Relocatable,
data: &Vec<MaybeRelocatable>,
) -> Result<Relocatable, MemoryError> {
for (num, value) in data.iter().enumerate() {
// Starting from the end ensures any necessary resize
// is performed once with enough room for everything
for (num, value) in data.iter().enumerate().rev() {
self.memory.insert((ptr + num)?, value)?;
}
(ptr + data.len()).map_err(MemoryError::Math)
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