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Optimization: Modify Heap
read and write related functions (wip)
#206
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From the spec: > Code pages > A code page contains 216216 instructions. They are not writable. > On genesis, code pages are filled as follows: > The contract code is places starting from the address 0. > The rest is filled with a value guaranteed to decode as invalid > instruction. Our code before this fix panics when running the benchmarks due to this discrepancy. The applied fix creates a newtype for code pages that wraps the `Vec<U256>` and returns `U256::zero()` when reading out of bounds, which decodes to an invalid instruction, matching the spec and fixing the `panic`.
ci: fix yml file ci: fix yml file (again) debug: temporarily comment workflow to test ci
ci: remove working directory step ci: add comment ci: use node-setup
ci: fix yarn cache ci: comment bench step for now ci: add working directory for contracts ci: set path for yarn cache ci: fix path to zksync-era yarn.lock
makefile: remove 'touch' command from make target
zksync-era: bump era commit
JulianVentura
changed the title
Optimization: Modify
Optimization: Modify Aug 20, 2024
Heap::read
function (wip)Heap
read and write related functions (wip)
…to ci/add_era_benches
Close because moved to #216 |
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Description
This PR improves vm performance by updating
Heap
read and write related functions.Inspiration
We are currently iterating and applying
U256
operations with afor
loop on someHeap
functions, likeread
. It works, but it's not very efficient. We may replace this with functions likeU256::from_big_endian
instead.Changes
Heap::store
Heap::read
Heap::expanded_read
Heap::read_unaligned_from_pointer
Results
heap_read_write
.event_spam
benches.