# A Survey of Parallel VM Systems

Source: https://medium.com/@devteam_48518/a-survey-of-parallel-evm-9aed9d50aee0
Kiwi News: https://news.kiwistand.com/stories/A-Survey-of-Parallel-VM-Systems?index=0x66d17005f4f7e27b1cc970a21939d5e3d70cc0eb6dce1644441c8e856e809f3b78cf7ebe
Submitted by 0x881B...41F2 on 2024-08-30 UTC, 1 upvote, 0 comments

## Summary

This article presents experiments comparing parallel execution models in blockchain systems, arguing that the PREDA model shows significant throughput and scalability gains. It reports absolute TPS for equivalent ERC20 contracts on Sei, Aptos, Sui, Crystality and PREDA on a 128-core machine, with speedup ratios used to compare each system against its own single-VM baseline. Aptos uses optimistic parallelization and Sui uses pessimistic parallelization, while PREDA uses a shared-nothing architecture that relays execution between EVMs.