Segment 12

This sub-session concluded Phase 3 by executing a systematic E2E GPU testing campaign on the RTX 5070 Ti with real 32 GiB PoRep data, validating timeout flush, batch-of-2 with synthesis amortization (1.42x throughput improvement), 3-proof overflow handling, and WinningPoSt bypass. Results were documented in cuzk-project.md and committed. The sub-session then launched Phase 4, creating local forks of bellpepper-core and supraseal-c2 to implement four optimizations: SmallVec for LC Indexer heap allocations (A1), pre-sizing of ProvingAssignment (A2), parallelization of B_G2 CPU MSMs (A4), pinning of a/b/c vectors via cudaHostRegister (B1), and per-MSM window tuning (D4). An initial benchmark showed a regression (106s vs 89s baseline), prompting immediate reversion of A2's usage in synthesis call sites and the addition of detailed phase-level timing instrumentation to the CUDA code for precise A/B testing.

From Validation to Optimization: How Phase 3 of the cuzk SNARK Engine Was Proven and Phase 4's First Campaign Revealed the Gap Between Theory and Practice 3627 words

Chunks

• The Validation of Cross-Sector Batching: How Phase 3 of the cuzk SNARK Proving Engine Was Systematically Tested and Proven
  2513 words
• The Phase 4 Optimization Campaign: From Reconnaissance to Regression to Instrumentation in the cuzk SNARK Proving Engine
  2345 words