feat: parallelize ACIR parsing and decompression#20873
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ludamad merged 4 commits intoFeb 27, 2026
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Parallelize the two independent loops in private_execution_steps.cpp: 1. PrivateExecutionSteps::parse() - deserializes ACIR bytecode/witnesses 2. PrivateExecutionStepRaw::load_and_decompress() - decompresses gzip data Both loops operate on independent per-step data with preallocated output vectors, making them trivially parallelizable. The original blocker (bincode thread-safety) is no longer relevant since the format migrated to msgpack. Closes AztecProtocol/barretenberg#1395 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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## Summary - Parallelizes `PrivateExecutionSteps::parse()` — deserializes each step's ACIR bytecode and witness data in parallel using `parallel_for` - Parallelizes `PrivateExecutionStepRaw::load_and_decompress()` — decompresses gzip data for each step in parallel Closes #1395 [ClaudeBox log](http://ci.aztec-labs.com/6987e2365fae49247e056cb7a95c3578)
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Summary
PrivateExecutionSteps::parse()— deserializes each step's ACIR bytecode and witness data in parallel usingparallel_forPrivateExecutionStepRaw::load_and_decompress()— decompresses gzip data for each step in parallelCloses #1395
ClaudeBox log