Segment 9

In this sub-session, the assistant continued Phase 2 of the cuzk pipelined SNARK proving engine. An initial E2E GPU test of the per-partition pipelined PoRep C2 path revealed a critical performance regression (~611s vs ~93s baseline). To address this, a batch-all-partitions synthesis mode (synthesize_porep_c2_batch) was implemented, synthesizing all 10 partitions in a single rayon call and proving in one GPU call. Pipeline support was also expanded to all proof types by adding synthesize_post() and synthesize_snap_deals() functions. A subsequent GPU test of the batch-mode PoRep C2 pipeline produced a valid 1920-byte proof in 91.2 seconds, matching the monolithic Phase 1 baseline. The assistant then began planning the next architectural goal: true async overlap using a bounded channel between synthesis and GPU workers for throughput on continuous proof streams. All 15 unit tests pass with zero warnings, and both CUDA and non-CUDA builds compile cleanly.

The Phoenix Architecture: How a 6.6× Performance Regression Forged the cuzk Phase 2 Pipelined Proving Engine 3014 words

Chunks

• The Crucible of Reality: How an E2E GPU Test Transformed the cuzk Phase 2 Pipeline Architecture
  2370 words
• From Crisis to Blueprint: How a 6.6× Performance Regression Reshaped the cuzk Pipelined Proving Engine
  1971 words